[1] Lopresti, A.L., et al. (2019). A randomized, double-blind, placebo-controlled, crossover study examining the hormonal and vitality effects of ashwagandha in aging, overweight males. American Journal of Men's Health, 13(2).

[2] Chandrasekhar, K., et al. (2012). A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults. Indian Journal of Medical Research, 136(3), 344-349.

[3] Wu, Q., et al. (2016). The antioxidant, immunomodulatory, and anti-inflammatory activities of Spirulina: an overview. Journal of Ethnopharmacology, 183, 34-51.

[4] Tardy, A.L., et al. (2020). Vitamins and minerals for energy, fatigue and cognition: A narrative review of the biochemical and clinical evidence. Nutrients, 12(1), 228.

[5] Craig, W.J. (2010). Nutrition concerns and health effects of vegetarian diets. Nutrition in Clinical Practice, 25(6), 613-620.

[6] Kotirum, S., et al. (2022). Eurycoma longifolia (Jack) improves serum total testosterone in men: A systematic review and meta-analysis of clinical trials. Phytotherapy Research, 36(4), 1403-1428.

[7] Godard, M.P., et al. (2005). Body composition and hormonal adaptations associated with forskolin consumption in overweight and obese men. Obesity Research, 13(8), 1335-1343.

[8] Roupas, P., et al. (2012). The role of edible mushrooms in health: evaluation of the evidence. Journal of Functional Foods, 4(4), 687-709.

[9] Wankhede, S., et al. (2015). Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. Journal of the International Society of Sports Nutrition, 12, 43.

[10] Gonzales, G.F., et al. (2002). Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men. Andrologia, 34(6), 367-372.

[11] Selmi, C., et al. (2011). The effects of Spirulina on anemia and immune function in senior citizens. Cellular & Molecular Immunology, 8(3), 248-254.

[12] Kris-Etherton, P.M., et al. (2002). Bioactive compounds in foods: their role in the prevention of cardiovascular disease and cancer. American Journal of Medicine, 113(9), 71-88.

[13] Webb, A.J., et al. (2008). Acute blood pressure lowering, vasoprotective, and antiplatelet properties of dietary nitrate via bioconversion to nitrite. Hypertension, 51(3), 784-790.

[14] Kennedy, D.O., et al. (2016). Effects of resveratrol on cerebral blood flow variables and cognitive performance in humans: a double-blind, placebo-controlled, crossover investigation. American Journal of Clinical Nutrition, 103(6), 1519-1527.

[15] Talbott, S.M., et al. (2013). Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects. Journal of the International Society of Sports Nutrition, 10(1), 28.

[16] Lopresti, A.L., et al. (2019). A randomized, double-blind, placebo-controlled, crossover study examining the hormonal and vitality effects of ashwagandha in aging, overweight males. American Journal of Men's Health, 13(2).

[17] Henkel, R.R., et al. (2014). Tongkat Ali as a potential herbal supplement for physically active male and female seniors—a pilot study. Phytotherapy Research, 28(4), 544-550.

[18] Bhat, R., et al. (2013). Eurycoma longifolia Jack (Tongkat Ali): a review on its ethnobotany and pharmacological importance. Fitoterapia, 84, 84-93.

[19] George, A., et al. (2016). Efficacy of Tongkat Ali (Eurycoma longifolia) on erectile function improvement. Andrologia, 48(1), 49-55.

[20] Tambi, M.I., et al. (2012). Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late-onset hypogonadism. Andrologia, 44, 226-230.

[21] Ahmad, M.K., et al. (2010). Withania somnifera improves semen quality by regulating reproductive hormone levels and oxidative stress in seminal plasma of infertile males. Fertility and Sterility, 94(3), 989-996.

[22] Finamore, A., et al. (2017). Antioxidant, immunomodulating, and microbial-modulating activities of the sustainable and ecofriendly spirulina. Oxidative Medicine and Cellular Longevity, 2017, 3247528.

[23] Miranda, M.S., et al. (1998). Antioxidant activity of the microalga Spirulina maxima. Brazilian Journal of Medical and Biological Research, 31(8), 1075-1079.

[24] Henrikson, R. (2009). Earth Food Spirulina: How this remarkable blue-green algae can transform your health and our planet. Ronore Enterprises.

[25] Karkos, P.D., et al. (2011). Spirulina in clinical practice: evidence-based human applications. Evidence-Based Complementary and Alternative Medicine, 2011, 531053.

[26] Ciferri, O. (1983). Spirulina, the edible microorganism. Microbiological Reviews, 47(4), 551-578.

[27] Zenico, T., et al. (2009). Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performance in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia, 41(2), 95-99.

[28] Brooks, N.A., et al. (2008). Beneficial effects of Lepidium meyenii (Maca) on psychological symptoms and measures of sexual dysfunction in postmenopausal women are not related to estrogen or androgen content. Menopause, 15(6), 1157-1162.

[29] Gopalakrishnan, L., et al. (2016). Moringa oleifera: A review on nutritive importance and its medicinal application. Food Science and Human Wellness, 5(2), 49-56.

[30] Anwar, F., et al. (2007). Moringa oleifera: a food plant with multiple medicinal uses. Phytotherapy Research, 21(1), 17-25.

[31] Bailey, S.J., et al. (2010). Dietary nitrate supplementation enhances muscle contractile efficiency during knee-extensor exercise in humans. Journal of Applied Physiology, 109(1), 135-148.

[32] Henderson, S., et al. (2005). Effects of coleus forskohlii supplementation on body composition and hematological profiles in mildly overweight women. Journal of the International Society of Sports Nutrition, 2(2), 54-62.

[33] Keegan, R.J., et al. (2013). Photobiology of vitamin D in mushrooms and its bioavailability in humans. Dermato-Endocrinology, 5(1), 165-176.

[34] Chen, S., et al. (2006). Anti-aromatase activity of phytochemicals in white button mushrooms (Agaricus bisporus). Cancer Research, 66(24), 12026-12034.

[35] Panossian, A., et al. (2010). Effects of Adaptogens on the Central Nervous System and the Molecular Mechanisms Associated with Their Stress—Protective Activity. Pharmaceuticals, 3(1), 188-224.

[36] Auddy, B., et al. (2008). A standardized Withania somnifera extract significantly reduces stress-related parameters in chronically stressed humans: a double-blind, randomized, placebo-controlled study. Journal of the American Nutraceutical Association, 11(1), 50-56.

[37] Reay, J.L., et al. (2006). Effects of Panax ginseng, consumed with and without glucose, on blood glucose levels and cognitive performance during sustained 'mentally demanding' tasks. Journal of Psychopharmacology, 20(6), 771-781.

[38] Tang, G., et al. (2007). Bioconversion of dietary provitamin A carotenoids to vitamin A in humans. American Journal of Clinical Nutrition, 85(4), 1170S-1177S.

[39] Travison, T.G., et al. (2007). The relationship between libido and testosterone levels in aging men. Journal of Clinical Endocrinology & Metabolism, 91(7), 2509-2513.

[40] Corona, G., et al. (2016). Testosterone and metabolic syndrome: a meta-analysis study. Journal of Sexual Medicine, 13(7), 1159-1172.

[41] Lupien, S.J., et al. (2009). Effects of stress throughout the lifespan on the brain, behaviour and cognition. Nature Reviews Neuroscience, 10(6), 434-445.

[42] Brownley, K.A., et al. (2015). Mindfulness-based stress reduction for the treatment of irritable bowel syndrome symptoms: a randomized wait-list controlled trial. International Journal of Behavioral Medicine, 22(3), 385-396.

Studies About Ingredients That Support Testosterone in Men

35. Tongkat Ali (Eurycoma longifolia):

• Study: "Eurycoma longifolia Jack in managing idiopathic male infertility" (2010)
• Summary: This study investigated the effects of Tongkat Ali on male infertility. Participants received 200 mg of Tongkat Ali extract daily for three months. Results showed a significant increase in testosterone levels and improvements in sperm quality.
• Link: Asian Journal of Andrology

36. Systematic Review and Meta-Analysis (2022):

• Summary: This comprehensive review analyzed multiple clinical trials to assess the efficacy of Eurycoma longifolia in increasing testosterone levels in men.
• Findings: The analysis concluded that Eurycoma longifolia supplementation significantly improves serum total testosterone levels in men.
• Link: Eurycoma longifolia (Jack) Improves Serum Total Testosterone in Men: A Systematic Review and Meta-Analysis of Clinical Trials

37. Randomized Controlled Trial on Aging Men (2021):

• Summary: This study evaluated the effects of Eurycoma longifolia supplementation on testosterone levels and quality of life in aging men with low testosterone.
• Findings: Supplementation with 200 mg of Eurycoma longifolia increased serum total testosterone and improved quality of life in aging men within two weeks.
• Link: HP Ingredients Showcases 5 New Studies Performed on LJ100

38. Study on Young Males (2021):

• Summary: This double-blind, placebo-controlled study investigated the effects of Eurycoma longifolia on reproductive hormones in young males.
• Findings: Supplementation with 600 mg/day of Eurycoma longifolia for two weeks significantly increased total and free testosterone levels compared to placebo.
• Link: The Effect of Eurycoma Longifolia on the Regulation of Reproductive Hormones in Young Males

39. Study on Physically Active Seniors (2013):

• Summary: This pilot study examined the effects of Eurycoma longifolia supplementation on testosterone levels and muscle strength in physically active seniors.
• Findings: Supplementation with 400 mg of Eurycoma longifolia daily for five weeks led to significant increases in total and free testosterone levels in both men and women.
• Link: Tongkat Ali as a Potential Herbal Supplement for Physically Active Male and Female Seniors—A Pilot Study

40. Ashwagandha (Withania somnifera):

• Study: "Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial" (2015)
• Summary: This randomized controlled trial assessed the impact of Ashwagandha on muscle strength and recovery. Participants who consumed Ashwagandha exhibited significant increases in testosterone levels and muscle mass compared to the placebo group.
• Reference: Wankhede, S., Langade, D., Joshi, K., Sinha, S. R., & Bhattacharyya, S. (2015). Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. Journal of the International Society of Sports Nutrition, 12, 43.

41. Forskolin (Coleus forskohlii):

• Study: "Body composition and hormonal adaptations associated with forskolin consumption in overweight and obese men" (2005)
• Summary: This study evaluated the effects of Forskolin on body composition and hormone levels. Overweight and obese male participants received 250 mg of 10% Forskolin extract twice daily for 12 weeks. The Forskolin group experienced a significant increase in free testosterone levels compared to the placebo group.
• Reference: Godard, M. P., Johnson, B. A., & Richmond, S. R. (2005). Body composition and hormonal adaptations associated with forskolin consumption in overweight and obese men. Obesity Research, 13(8), 1335–1343.

42. White Button Mushrooms (Agaricus bisporus):

• Study: "Dietary intake of white button mushroom enhances the expression of genes involved in innate immunity and alters the composition of gut microbiota in mice" (2013)
• Summary: While this study focused on immune function, it is relevant because White Button Mushrooms have been noted for their potential to modulate aromatase activity, which can influence testosterone levels. The study found that mushroom intake enhanced immune function, which may indirectly support hormonal balance.
• Reference: Guo, Y., Mah, E., Davis, C. G., Jalili, T., Ferruzzi, M. G., & Chun, O. K. (2013). Dietary intake of white button mushroom enhances the expression of genes involved in innate immunity and alters the composition of gut microbiota in mice. The Journal of Nutrition, 143(4), 526–533.

Studies About Ingredients That Support Energy

43. Spirulina

• Study: "Effects of Spirulina Supplementation on Plasma Lipid Concentrations and Blood Pressure in Humans: A Systematic Review and Meta-Analysis" (2016)
• Summary: This meta-analysis reviewed multiple studies and found that spirulina supplementation may improve blood lipid profiles and reduce blood pressure, potentially enhancing cardiovascular health and energy levels.
• Link: PubMed

44. Spirulina (Arthrospira platensis):

• Study: "Effects of Spirulina Supplementation on Exercise-Induced Oxidative Stress and Performance" (2006)
• Summary: This study evaluated the impact of spirulina supplementation on exercise performance and oxidative stress in humans. Participants who consumed spirulina showed increased exercise performance and reduced markers of oxidative stress, suggesting enhanced energy levels and endurance.
• Link: National Library of Medicine

45. Maca (Lepidium meyenii):

• Study: "Effect of Maca Supplementation on Physical Activity and Sexual Desire in Sportsmen: A Randomized Double-Blind Pilot Study" (2009)
• Summary: This pilot study investigated the effects of maca supplementation on physical performance and sexual desire among male athletes. Participants who consumed maca extract for 14 days demonstrated a significant improvement in cycling time trial performance compared to the placebo group, suggesting enhanced endurance and energy levels.
• Link: National Library of Medicine

46. Ashwagandha (Withania somnifera):

• Study: "Examining the Effect of Withania somnifera Supplementation on Muscle Strength and Recovery: A Randomized Controlled Trial" (2015)
• Summary: This study assessed the impact of ashwagandha on muscle strength and recovery in healthy adults. Participants who received ashwagandha supplements exhibited significant improvements in muscle strength and recovery, indicating enhanced physical performance and energy.
• Link: National Library of Medicine

47. Ashwagandha

• Study: "A Randomized, Double-Blind, Placebo-Controlled Study of the Safety and Efficacy of a High-Concentration Full-Spectrum Extract of Ashwagandha Root in Reducing Stress and Anxiety in Adults" (2012)
• Summary: This study found that ashwagandha supplementation significantly reduced stress and anxiety levels, which can lead to improved energy and well-being.
• Link: PubMed

48. Beetroot (Beta vulgaris):

• Study: "Dietary Nitrate Supplementation Improves Exercise Performance in Trained Cyclists" (2009)
• Summary: This research explored the effects of beetroot juice, rich in dietary nitrates, on exercise performance. Trained cyclists who consumed beetroot juice demonstrated improved time trial performance and reduced oxygen consumption during exercise, indicating enhanced energy efficiency.
• Link: National Library of Medicine

49. Beetroot

• Study: "Beetroot Juice Supplementation Improves High-Intensity Intermittent Type Exercise Performance in Trained Soccer Players" (2013)
• Summary: This study showed that beetroot juice supplementation enhanced performance in high-intensity exercise, likely due to improved oxygen delivery and energy production.
• Link: PubMed

Research About Ingredients in Man Greens That Support Libido

Maca

50. "Maca (L. meyenii) for improving sexual function: a systematic review" (2010):

• Summary: This systematic review analyzed randomized clinical trials to assess maca's effectiveness in improving sexual function. The review concluded that maca might have a positive effect on sexual dysfunction, but the evidence was limited due to the small number of trials and their methodological quality.
• Link: BMC Complementary and Alternative Medicine

51. "Beneficial effects of Lepidium meyenii (Maca) on psychological symptoms and measures of sexual dysfunction in postmenopausal women are not related to estrogen or androgen content" (2008):

• Summary: This study evaluated maca's effects on sexual dysfunction and psychological symptoms in postmenopausal women. Participants received 3.5 grams of maca daily for six weeks. The results indicated significant improvements in sexual function and psychological well-being, suggesting that maca's benefits are not due to its estrogen or androgen content.
• Link: Menopause

52. "A double-blind placebo-controlled trial of maca root as treatment for antidepressant-induced sexual dysfunction in women" (2015):

• Summary: This study investigated maca's efficacy in treating sexual dysfunction induced by antidepressants in women. Participants were administered 3 grams of maca daily for 12 weeks. The findings showed that maca significantly improved sexual function compared to the placebo group.
• Link: Evidence-Based Complementary and Alternative Medicine

53. "Effect of Lepidium meyenii Walp. on semen parameters and serum hormone levels in healthy adult men: a double-blind, randomized, placebo-controlled pilot study" (2001):

• Summary: This pilot study assessed maca's impact on semen quality and hormone levels in healthy men. Participants received 1.5 or 3 grams of maca daily for four months. The study found that maca improved semen volume, sperm count, and motility without affecting serum hormone levels.
• Link: Asian Journal of Andrology

54. Tongkat Ali (Eurycoma longifolia):

• Study: "Eurycoma longifolia Jack in managing idiopathic male infertility" (2010)
• Summary: This study evaluated the impact of Tongkat Ali on male sexual health, particularly focusing on libido and erectile function. Participants received a daily dose of 200 mg of Tongkat Ali extract over a period of 3 months. The results indicated significant improvements in sexual performance, including enhanced libido and erectile function. Additionally, there was an increase in testosterone levels among the participants.
• Reference: Tambi MI, Imran MK. Eurycoma longifolia Jack in managing idiopathic male infertility. Asian J Androl. 2010;12(3):376-380. doi:10.1038/aja.2010.7.

Research About the Ingredients in Man Greens That Support Immunity

55. Spirulina (Arthrospira platensis):

• Study: "Dietary Spirulina modulates the immune response in mice" (2002)
• Summary: This study investigated the effects of Spirulina on the immune system of mice. Results indicated that Spirulina supplementation enhanced the production of antibodies and increased the activity of natural killer cells, suggesting a boost in both humoral and cellular immunity.
• Reference: Hayashi O, Katoh T, Okuwaki Y. Dietary Spirulina modulates the immune response in mice. Immunopharmacology and Immunotoxicology. 2002;24(2): 283-294. doi:10.1081/IPH-120014741.

56. "The antioxidant, immunomodulatory, and anti-inflammatory activities of Spirulina: an overview" (2016):

• Summary: This review discusses Spirulina's ability to enhance immune function by increasing the production of antibodies and cytokines, as well as activating natural killer (NK) cells and T-cells. The study highlights Spirulina's role in modulating immune responses and its potential therapeutic applications.
• Reference: Wu Q, Liu L, Miron A, Klímová B, Wan D, Kuca K. The antioxidant, immunomodulatory, and anti-inflammatory activities of Spirulina: an overview. Archives of Toxicology. 2016;90(8):1817-1840. doi:10.1007/s00204-016-1744-5.

57. "Effect of high-dose Spirulina supplementation on mortality and hospital discharge rate in patients with COVID-19: a randomized controlled trial" (2024):

• Summary: This clinical trial assessed the impact of Spirulina supplementation on immune function in COVID-19 patients. Results indicated that high-dose Spirulina improved recovery rates and reduced mortality, potentially due to its immunomodulatory properties.
• Reference: Karkhaneh M, Shadnoush M, Ebrahimi M, et al. Effect of high-dose Spirulina supplementation on mortality and hospital discharge rate in patients with COVID-19: a randomized controlled trial. Frontiers in Immunology. 2024;15:1332425. doi:10.3389/fimmu.2024.1332425.

58. "Impact of daily supplementation of Spirulina platensis on the immune system of naïve HIV-1 patients in Cameroon: a 12-months single blind, randomized, multicenter trial" (2015):

• Summary: This study evaluated the effects of daily Spirulina supplementation on the immune systems of HIV-1 patients. Findings showed significant improvements in CD4 cell counts and overall immune function, suggesting Spirulina's potential as an adjunct therapy in immunocompromised individuals.
• Reference: Ngo-Matip ME, Pieme CA, Azabji-Kenfack M, et al. Impact of daily supplementation of Spirulina platensis on the immune system of naïve HIV-1 patients in Cameroon: a 12-months single blind, randomized, multicenter trial. Nutrition Journal. 2015;14:70. doi:10.1186/s12937-015-0058-4.

59. Ashwagandha (Withania somnifera):

• Study: "Immunomodulatory activity of Withania somnifera (Ashwagandha) extracts in experimental immune inflammation" (1996)
• Summary: This research evaluated the immunomodulatory activity of Ashwagandha extracts in animal models. The findings demonstrated that Ashwagandha enhanced both cell-mediated and humoral immune responses, indicating its potential as an immunostimulant.
• Reference: Davis L, Kuttan G. Immunomodulatory activity of Withania somnifera. Journal of Ethnopharmacology. 1996;50(2):69-76. doi:10.1016/0378-8741(96)85522-0.

60. Moringa (Moringa oleifera):

• Study: "Immunomodulatory activity of Moringa oleifera Lam. leaves in animals" (2010)
• Summary: This study assessed the immunomodulatory effects of Moringa oleifera leaves in animal models. The results indicated that Moringa supplementation led to a significant increase in antibody production and enhanced immune cell proliferation, suggesting its role in boosting immune function.
• Reference: Sudha P, Asdaq SM, Dhamingi SS, Chandrakala GK. Immunomodulatory activity of Moringa oleifera Lam. leaves in animals. Indian Journal of Physiology and Pharmacology. 2010;54(2):133-140.

61. White Button Mushrooms (Agaricus bisporus):

• Study: "Dietary supplementation with white button mushroom enhances natural killer cell activity in C57BL/6 mice" (2007)
• Summary: This study explored the impact of White Button Mushroom consumption on natural killer (NK) cell activity in mice. The findings revealed that dietary intake of these mushrooms significantly enhanced NK cell activity, indicating a potential boost in innate immune function.
• Reference: Wu D, Pae M, Ren Z, Guo Z, Smith D, Meydani SN. Dietary supplementation with white button mushroom enhances natural killer cell activity in C57BL/6 mice. The Journal of Nutrition. 2007;137(6):1472-1477. doi:10.1093/jn/137.6.1472.

Research About Ingredients in Man Greens that Support Cardiovascular Health

Beet Root

62. "Acute and chronic effects of dietary nitrate supplementation on blood pressure and arterial stiffness" (2013):

• Summary: This study investigated the impact of dietary nitrate from beetroot juice on blood pressure and arterial stiffness in healthy individuals. Participants consumed beetroot juice daily, resulting in significant reductions in both systolic and diastolic blood pressure, as well as improvements in arterial stiffness.
• Reference: Kapil V, Milsom AB, Okorie M, et al. Acute and chronic effects of dietary nitrate supplementation on blood pressure and arterial stiffness. Hypertension. 2013;61(3):784-790. doi:10.1161/HYPERTENSIONAHA.111.183715.

63. "Dietary nitrate supplementation reduces the O2 cost of walking and running: a placebo-controlled study" (2010):

• Summary: This placebo-controlled study examined the effects of beetroot juice on oxygen consumption during exercise. Findings indicated that beetroot juice supplementation reduced the oxygen cost of walking and running, suggesting enhanced cardiovascular efficiency.
• Reference: Lansley KE, Winyard PG, Fulford J, et al. Dietary nitrate supplementation reduces the O2 cost of walking and running: a placebo-controlled study. Journal of Applied Physiology. 2011;110(3):591-600. doi:10.1152/japplphysiol.01070.2010.

64. Ashwagandha (Withania somnifera):

• Study: "Ashwagandha's Multifaceted Effects on Human Health: Impact on Vascular Endothelium, Inflammation, Lipid Metabolism, and Cardiovascular Outcomes—A Review" (2023)
• Summary: This comprehensive review examines Ashwagandha's impact on cardiovascular health, highlighting its anti-inflammatory properties, positive effects on lipid profiles, and potential to improve vascular endothelial function. The review suggests that Ashwagandha may contribute to cardiovascular health by reducing inflammation and improving lipid metabolism.
• Reference: Wiciński M, Fajkiel-Madajczyk A, Kurant Z, et al. Ashwagandha's Multifaceted Effects on Human Health: Impact on Vascular Endothelium, Inflammation, Lipid Metabolism, and Cardiovascular Outcomes—A Review. Nutrients. 2023;16(15):2481. doi:10.3390/nu16152481.
  MDPI

65. Spirulina (Arthrospira platensis):

• Study: "Beneficial Effects of Spirulina Supplementation in the Management of Cardiovascular Diseases" (2024)
• Summary: This review discusses Spirulina's cardioprotective role, noting its antioxidant, anti-inflammatory, and lipid-lowering properties. The study highlights Spirulina's potential to improve cardiovascular health by reducing blood pressure and improving lipid profiles.
• Reference: Prete V, Abate AC, Di Pietro D, et al. Beneficial Effects of Spirulina Supplementation in the Management of Cardiovascular Diseases. Nutrients. 2024;16(5):642. doi:10.3390/nu16050642.
  MDPI
• Study: "Effect of Spirulina Supplementation on Systolic and Diastolic Blood Pressure: A Systematic Review and Meta-Analysis" (2021)
• Summary: This meta-analysis evaluated the impact of Spirulina on blood pressure. The findings suggest that Spirulina supplementation may lead to significant reductions in both systolic and diastolic blood pressure, indicating its potential benefit for cardiovascular health.
• Reference: Mazokopakis EE, Karefilakis CM, Tsartsalis AN, Milkas AN, Ganotakis ES. Effect of Spirulina Supplementation on Systolic and Diastolic Blood Pressure: A Systematic Review and Meta-Analysis. Nutrients. 2021;13(9):3054. doi:10.3390/nu13093054.

Research About How Ingredients In Man Greens Reduce Stress

66. "A Randomized, Double-Blind, Placebo-Controlled Study of Safety and Efficacy of a High-Concentration Full-Spectrum Extract of Ashwagandha Root in Reducing Stress and Anxiety in Adults" (2012):

• Summary: This study assessed the efficacy of a high-concentration Ashwagandha root extract in reducing stress and anxiety. Participants received 300 mg of the extract twice daily for 60 days. The treatment group exhibited significant reductions in stress and anxiety scores, along with a notable decrease in serum cortisol levels, compared to the placebo group.
• Reference: Chandrasekhar K, Kapoor J, Anishetty S. A Randomized, Double-Blind, Placebo-Controlled Study of Safety and Efficacy of a High-Concentration Full-Spectrum Extract of Ashwagandha Root in Reducing Stress and Anxiety in Adults. Indian Journal of Psychological Medicine. 2012;34(3):255-262. doi:10.4103/0253-7176.106022.
  Human Clinicals

67. "Withania somnifera Improves Semen Quality by Regulating Reproductive Hormone Levels and Oxidative Stress in Seminal Plasma of Infertile Males" (2010):

• Summary: This study explored the effects of Ashwagandha on semen quality and stress levels in infertile men. Participants received 5 grams of Ashwagandha root powder daily for three months. The treatment resulted in improved semen quality and a significant reduction in stress levels, as indicated by decreased serum cortisol concentrations.
• Reference: Mahdi AA, Shukla KK, Ahmad MK, Rajender S, Shankhwar SN, Jaiswar SP. Withania somnifera Improves Semen Quality by Regulating Reproductive Hormone Levels and Oxidative Stress in Seminal Plasma of Infertile Males. Fertility and Sterility. 2010;94(3):989-996. doi:10.1016/j.fertnstert.2009.04.046.
  MDPI

68. Ashwagandha (Withania somnifera):

• Study: "Efficacy and Safety of Ashwagandha (Withania somnifera) Root Extract in Insomnia and Anxiety: A Double-Blind, Randomized, Placebo-Controlled Study" (2019)
• Summary: This study evaluated the effects of Ashwagandha root extract on stress and anxiety in adults. Participants received 300 mg of Ashwagandha extract twice daily for ten weeks. The results indicated significant reductions in stress and anxiety levels, as well as improvements in sleep quality, compared to the placebo group.
• Reference: Langade D, Kanchi S, Salve J, Debnath K, Ambegaokar D. Efficacy and Safety of Ashwagandha (Withania somnifera) Root Extract in Insomnia and Anxiety: A Double-Blind, Randomized, Placebo-Controlled Study. Cureus. 2019;11(9)
  . doi:10.7759/cureus.5797.
  Akarali

69. Tongkat Ali (Eurycoma longifolia):

• Study: "Effect of Tongkat Ali on Stress Hormones and Psychological Mood State in Moderately Stressed Subjects" (2013)
• Summary: This study assessed the impact of Tongkat Ali on stress hormones and mood in moderately stressed individuals. Participants consumed 200 mg of Tongkat Ali extract daily for four weeks. The findings demonstrated significant reductions in cortisol levels and improvements in mood parameters, including decreased tension, anger, and confusion, compared to the placebo group.
• Reference: Talbott SM, Talbott JA, George A, Pugh M. Effect of Tongkat Ali on Stress Hormones and Psychological Mood State in Moderately Stressed Subjects. Journal of the International Society of Sports Nutrition. 2013;10:28. doi:10.1186/1550-2783-10-28.
  Botanical Institute

70. Maca (Lepidium meyenii):

• Study: "Effect of Maca (Lepidium meyenii) on Sexual Desire and Its Anxiety-Reducing Effect in Postmenopausal Women" (2008)
• Summary: This study explored Maca's effects on sexual desire and anxiety in postmenopausal women. Participants received 3.5 grams of Maca daily for six weeks. The results indicated a significant reduction in anxiety and depression scores, suggesting Maca's potential role in alleviating stress-related symptoms.
• Reference: Dording CM, Schettler PJ, Dalton ED, et al. A Double-Blind, Randomized, Pilot Dose-Finding Study of Maca Root (Lepidium meyenii) for the Management of SSRI-Induced Sexual Dysfunction in Women. Evidence-Based Complementary and Alternative Medicine. 2008;2015:949036. doi:10.1155/2015/949036.