You Have Too Much Man Greens. That's Not a Reason to Quit — It's the Diagnosis.

Every study behind this formula tested a fixed dose taken every single day. Not most days. Every day. Here's what the research says about the men who don't — and what they're leaving on the table.

From impressive increases in testosterone, fat loss, and stress reduction, to what happens if you miss a day, and how missing a week makes you start from scratch - you get to choose the results you get.

If you're reading this, there's a decent chance you opened a cupboard this week, found two bags, and thought: I'm ahead. I'll pause until I catch up.

Let me be straight with you, because you're a grown man and I'd rather have your trust than your click.

Extra product is not evidence you're overstocked. It's evidence you missed days.

One bag is thirty servings. If a bag lasts you six weeks, you took 30 of 42 doses. Eight weeks? 30 of 56 — you're supplementing on a coin flip. And there's something nobody in this industry will tell you, because it's inconvenient for every single one of us selling you something:

There is not one study — not one — on any ingredient in Man Greens that tested taking it most of the time.

Every trial below used a fixed daily dose, taken every day, for a fixed number of weeks. That's not a footnote. That's the experimental condition. The +46 kg bench press, the +96 ng/dL testosterone, the 32% cortisol crash, the 167% sperm count increase — every one of those numbers exists because of the daily part.

Take it four days out of seven and you aren't getting a smaller result. You're running a protocol that has never been tested by anyone, on anyone, ever.

So let's go through what these ingredients actually did to people in clinical trials. Then let's talk about why it's already working in you whether you feel it or not — and what to do with that spare bag.

Part 1: The clock is the active ingredient

Here's the most important study on this formula, and almost nobody cites it — because it's boring. It's boring because they measured the same men over and over instead of once at the end.

Testosterone —

Chinnappan et al., 2021, Food & Nutrition Research. Twelve weeks. Randomized, double-blind, placebo-controlled, multi-centre. 105 men, 50 to 70 years old, every one of them starting with total testosterone below 300 ng/dL. The active arm took 200 mg of standardised tongkat ali root extract, once daily after breakfast — the exact dose in every scoop of Man Greens.

Total testosterone in the 200 mg group, versus placebo:

Timepoint	Total testosterone	vs. placebo
Baseline	200.5 ng/dL	—
Week 2	207.9 ng/dL	p = 0.06 — NOT significant
Week 4	215.4 ng/dL	p = 0.01
Week 8	218.9 ng/dL	p = 0.002
Week 12	225.0 ng/dL	p < 0.001

Read that table twice. It is the entire argument.

At two weeks, a full clinical dose of tongkat ali did nothing statistically real. A man who quit on day 14 would have concluded — correctly, based on his own experience — that it didn't work. By week four it worked. By week twelve the effect was ten times more statistically robust and the gain had nearly doubled, and it was still climbing when the study ran out of time.

Those men didn't get a result because they took tongkat ali. They got a result because they took it eighty-four mornings in a row.

Their Aging Males' Symptoms score fell from 58.3 to 26.7 — cut by more than half. Fatigue Severity improved at p < 0.001 at every timepoint. Strength on a back-leg-chest dynamometer went 60.07 → 63.06 kg versus placebo (p = 0.01).

And this isn't a one-off. The same pattern is stamped across the entire formula.

Cortisol (stress) — 

Salve et al., 2019, Cureus. Eight weeks of KSM-66 ashwagandha, twice daily. Serum cortisol, baseline → week 4 → week 8:

• KSM-66: 16.12 → 14.30 → 10.86 µg/dL. A 32.6% collapse in cortisol. p < 0.0001.
• Placebo: 16.15 → 15.52 → 15.52 (−3.9%)

Week four was the halfway house — cortisol falling with the statistical verdict not delivered until week eight. Perceived stress and sleep quality slid down the same eight-week ramp.

Most greens powders on the shelf carry ashwagandha in the tens of milligrams, a rounding error included so it can appear on the label. We print every milligram because the milligrams are the product.

Aerobic capacity —

Choudhary, Shetty & Langade, 2015, AYU. Twelve weeks, KSM-66 50 athletic adults. VO2max climbed 41.74 → 47.41 in the ashwagandha group versus 42.18 → 44.03 in placebo — three times the improvement, p < 0.0001.

Quality of life improved across every domain at both the eight- and twelve-week marks, and the twelve-week gain was larger than the eight-week gain.

Libido —

Gonzales et al., 2002, Andrologia. Twelve weeks, gelatinized maca at 1,500 mg/day versus placebo, men aged 21–56, sexual desire assessed at weeks 4, 8 and 12. The authors' own words: "An improvement in sexual desire was observed with Maca since 8 weeks of treatment." Logistic regression confirmed maca's independent effect at 8 and 12 weeks. Not at 4. And the lower dose worked as well as the higher one.

Then the companion paper — Gonzales et al., 2003, Journal of Endocrinology — measured LH, FSH, prolactin, 17-OH-progesterone, testosterone and estradiol at baseline, week 2, 4, 8 and 12, and found "Maca had no effect on any of the hormones studied."

Sit with that. The libido effect was real, statistically confirmed, and completely invisible to a full hormone panel.Something was improving in those men that the best available blood test could not see. Remember it — we're coming back to it.

Part 2: What's actually in the scoop — and what it did in trials

Tongkat Ali — 200 mg

The most rigorously studied hormonal botanical on earth, and for the three trials that matter most, our dose is the studied dose.

• Chinnappan 2021 (above): 200 mg/day, 12 weeks, RCT. Progressive testosterone increase from week 4. AMS score cut from 58.3 to 26.7.
• Talbott et al., 2013, J Int Soc Sports Nutr: 200 mg/day for four weeks in 63 moderately stressed adults, placebo-controlled. Salivary free hormones: cortisol −16%. Testosterone +37%. Cortisol-to-testosterone ratio −36%.Tension −11%, anger −12%, confusion −15% on the Profile of Mood States. Four weeks. Same dose that's in your scoop.
• Tambi, Imran & Henkel, 2012, Andrologia: 200 mg/day for one month in 76 men with late-onset hypogonadism. Men with testosterone in the normal range went from 35.5% to 90.8% (p < 0.0001). Men reporting no aging-male complaints: 10.5% to 71.7%. (Open-label, no placebo arm — weight it accordingly, but the effect size is hard to ignore.)
• Henkel et al., 2014, Phytotherapy Research: five weeks of daily tongkat ali in physically active seniors aged 57–72 produced "significant increases in total and free testosterone concentrations and muscular force in men and women." Double our dose, in a small uncontrolled pilot — included for direction, not for magnitude.
• Leisegang et al., 2022, Medicina — meta-analysis, 5 RCTs, 232 participants: pooled effect on total testosterone SMD 1.352 (95% CI 0.565–2.138), p = 0.001. In statistics an SMD above 0.8 is a large effect. This is 1.35. The strongest signal came from men who started below 300 ng/dL — which, if you're over 40 and tired, is very possibly you. (The authors flag high heterogeneity and publication bias in that subgroup; the effect is large and the literature is young.)

KSM-66® Ashwagandha — 500 mg

The most-studied branded ashwagandha extract in the world. 

• Wankhede et al., 2015, J Int Soc Sports Nutr: eight weeks, 50 men aged 18–50, supervised resistance training, KSM-66 versus placebo. The results are frankly ridiculous:
  • Bench press 1RM: +46.0 kg versus +26.4 kg placebo (p = 0.001). Nearly double the strength gain from identical training.
  • Serum testosterone: +96.2 ng/dL versus +18.0 (p = 0.004). Five times the increase.
  • Arm muscle cross-section +8.6 vs +5.3 cm² (p = 0.01). Chest +3.3 vs +1.4 cm (p < 0.001).
  • Body fat −3.5% versus −1.5% (p = 0.03).
  • Creatine kinase — the marker of muscle damage — rose less in the ashwagandha group (p = 0.03). They trained the same and recovered better.
• Chandrasekhar, Kapoor & Anishetty, 2012, Indian J Psychological Medicine: 60 days, 64 chronically stressed adults. Stress and anxiety scales improved at p < 0.0001; serum cortisol substantially reduced at p = 0.0006.
• Salve 2019, Langade 2019, Choudhary 2015: the cortisol, sleep and VO2max data above.
• Ambiye 2013: the 90-day sperm data above, at 675 mg/day.

Eight weeks is what it took to nearly double a man's strength gains. Not eight sessions. Fifty-six consecutive days.

Organic Spirulina — 5,000 mg

Five grams. A genuine food-level dose, inside the 1–8 g/day range human trials use.

• Kalafati et al., 2010, Medicine & Science in Sports & Exercise: four weeks daily in trained men, placebo-controlled crossover. Time to fatigue improved after a two-hour run. Carbohydrate oxidation −10.3%, fat oxidation +10.9% — a measurable shift toward burning fat for fuel. Glutathione higher and lipid peroxidation blunted after exercise.
• Park et al., 2008, Annals of Nutrition & Metabolism: randomized, double-blind, placebo-controlled, 16 consecutive weeks in 78 older adults. Cholesterol down, IL-2 up, IL-6 significantly reduced, and a statistically significant time-by-treatment antioxidant effect — meaning the two groups' trajectories genuinely diverged over four months.
• Machowiec et al., 2021, Nutrients — meta-analysis: systolic −4.59 mmHg (95% CI −8.20 to −0.99), diastolic −4.29 mmHg. Doses 1–8 g/day. Baseline mattered most: −9.18 mmHg in hypertensive participants versus −2.26 in normotensive.
• Torres-Durán et al., 2007, Lipids in Health and Disease: six weeks daily with blood drawn every single week.Triglycerides 233.7 → 167.7 mg/dL (p < 0.001). Total cholesterol 181.7 → 163.5 (p < 0.001). HDL 43.5 → 50 (p < 0.01). Systolic pressure down roughly 10 mmHg. And the line that matters here: "a significant decrease on systolic blood pressure was observed since the fourth week." Three weeks of perfect daily compliance, nothing. Week four, it showed up. (Open-label with no control group — so treat it as a timeline observation, not proof of effect. The timeline is the point.)

Organic Maca Root Extract 4:1 — 1,500 mg

The 12-week libido data above, plus Zenico et al., 2009, Andrologia — 12 weeks of daily maca dry extract in 50 men with mild erectile dysfunction: IIEF-5 improvement +1.6 versus +0.5 placebo, p < 0.001, with maca alone improving physical and social performance well-being. Twelve weeks. Daily.

Forskolin (Coleus forskohlii) — 250 mg

Godard, Johnson & Richmond, 2005, Obesity Research: twelve weeks, 30 overweight men, randomized and double-blind.

• Free testosterone significantly increased versus placebo (p ≤ 0.05).
• Body fat percentage and fat mass significantly reduced on DXA (p ≤ 0.05).
• Bone mass favourably changed versus placebo (p ≤ 0.05) — in twelve weeks.
• Lean body mass trended up (p = 0.097). Total testosterone rose 16.77% while falling 1.08% in placebo, though that particular difference didn't reach statistical significance.

Part 3: You will not feel it first. That's not a flaw — that's biology.

This is what costs men their results.

The expectation is that a supplement should announce itself. A rush. A switch flipping. That's what a stimulant does. It is emphatically not what a hormonal or nutritional intervention does, and the biology explains why with zero ambiguity.

Your tissues turn over on schedules measured in months.

• A red blood cell lives about 116 days (Shrestha et al., 2016, J Pharmacokinet Pharmacodyn — mean 115.60, 95% CI 109.17–121.66). Nutrient status carried in red cells physically cannot reflect what you did last week.
  
• One cancellous bone remodelling cycle takes about 200 days — resorption 30–40 days, formation ~150 (Eriksen, 2010, Reviews in Endocrine and Metabolic Disorders). Godard's men changed bone mass in twelve weeks. Not one of them felt it.
• Muscle is the cleanest case in all of physiology. Damas et al., 2016, Journal of Physiology: ten previously untrained men, ten weeks of resistance training, muscle biopsies at weeks 1, 3 and 10. Fibre cross-sectional area increased only at week 10 (p = 0.017). Nine weeks of hard, productive, adaptive training and the biopsy showed no fibre growth. The work landed every session. The tissue just hadn't filed its report.

And you are measurably terrible at detecting slow change.

Not a character defect — a documented property of human perception. Simons, Franconeri & Reimer, 2000, Perception showed change blindness with no visual interruption at all: when a scene changed via a gradual twelve-second dissolve, people spotted it no better than across a blank screen — and for colour changes they did worse (31% detection for gradual versus 41% across a disruption). Change that arrives slowly enough is invisible while you stare directly at it.

Now apply that to your own body. Your cortisol curve flattening by a third over eight weeks. Your sleep latency dropping six minutes. Your testosterone climbing 25 ng/dL. Your body fat down 3.5%. Every one of those is a real, published, statistically significant effect — and every one arrives too slowly and too far below your perceptual threshold to register as an event.

The most valuable improvements in all of medicine are ones nobody can feel.

One of the largest blood pressure meta-analyses ever assembled — Ettehad et al., 2016, The Lancet, 123 trials, 613,815 participants — found every 10 mmHg drop in systolic pressure was associated with a 27% lower risk of stroke (RR 0.73, 95% CI 0.68–0.77), 20% fewer major cardiovascular events, and 13% lower all-cause mortality. The Cholesterol Treatment Trialists' 2010 analysis in The Lancet, 26 trials and ~170,000 people: every 1.0 mmol/L drop in LDL cut major vascular events 22% (RR 0.78, 95% CI 0.76–0.80).

No man in history has ever felt his systolic pressure fall ten points. None has felt his stroke risk drop by a quarter. The benefit was enormous. The sensation was zero. Torres-Durán's spirulina subjects dropped roughly ten systolic points in six weeks and felt precisely nothing.

Sometimes the gap is stark. In the D-Vitaal trial (de Koning et al., 2019, American Journal of Clinical Nutrition), daily vitamin D doubled participants' serum 25(OH)D by the six-month mark — 85 versus 43 nmol/L, p < 0.001 — and changed nothing about how they said they felt across a full year. That trial makes one narrow point undeniably: your subjective experience is not a measuring instrument. A biomarker can move dramatically while the man carrying it notices nothing whatsoever.

And remember maca. Twelve weeks of daily dosing produced a confirmed improvement in sexual desire with zero movement in any measured hormone. Those men felt something no blood panel could detect. 

So stop asking the wrong question. "Do I feel different today?" has no informational content at week two — Chinnappan proved that at p = 0.06. The only question with predictive power is:

am I hitting the dose every day, the way every subject in every study on this page did?

That's the one variable you control. It's also the only one that determined whether those trials produced a result at all.

Part 4: What actually happens when you pause

Here's where the extra bag stops being an inventory question and becomes a biological one.

Lopresti, Drummond & Smith, 2019, American Journal of Men's Health ran a 16-week crossover trial of a standardised ashwagandha extract in men aged 40–70 and deliberately built it with no washout period — specifically to see what happened to their hormones after they stopped.

Eight weeks of daily dosing: DHEA-S rose 18.0% more than placebo (p = .005). Testosterone rose 14.7% more (p = .010).

Then they stopped taking it.

DHEA-S fell from 9.98 to 8.24 nmol/L — a statistically significant reversal (p = .035). Testosterone drifted down too, from 332.77 to 295.41 pmol/L, though that decline didn't reach significance on its own. The authors' conclusion was that the hormonal changes were not sustained after discontinuation. Eight weeks of gains, given back.

The same pattern appears everywhere anyone bothers to measure it. Kapil et al., 2015, Hypertension gave 68 hypertensive patients a daily dietary nitrate dose for four weeks: blood pressure fell 7.7/2.4 mmHg in clinic and 7.7/5.2 mmHg on 24-hour monitoring, endothelial function improved ~20%, arterial stiffness dropped — with "no evidence of tachyphylaxis over the 4-week intervention period." The benefit never faded from continued use. It faded when they stopped: after two weeks off, pressure was heading back to baseline and plasma nitrate and nitrite had returned to baseline outright. (Their nitrate dose was far above anything in a greens scoop — the finding I'm borrowing is about cessation, not about our beetroot.)

Even creatine — the most reliably effective legal supplement in existence — needs only 4 to 6 weeks for muscle stores to fall back to baseline once you quit (Kreider et al., 2017, ISSN position stand).

Understand what this means. A "pause" is not a pause. A pause is a partial reversal, and then you restart at week zero of the Chinnappan table. Week two. p = 0.06. Nothing.

You do not get to keep your place in line. Twelve weeks of work, surrendered to save less than $2/day.

Part 5: The real problem — and it isn't the product

If bags are stacking up, the honest diagnosis is that you don't have a supplement problem. You have a cue problem. The dose isn't attached to anything in your day, so it depends on remembering — and remembering is the least reliable system you own.

The research here is unusually clear, and unusually good news.

Lally, van Jaarsveld, Potts & Wardle, 2010, European Journal of Social Psychology recruited 96 people to form a new daily habit and measured automaticity every single day for twelve weeks. Of those, 39 produced clean habit-formation curves, and the finding from those curves was this: "The median time to reach 95% of asymptote was 66 days, with a range from 18 to 254 days."

Sixty-six days is roughly two bags.

That is very likely exactly how far you are from this being automatic — not remembered, not willed, just done, like brushing your teeth. The two bags in your cupboard aren't surplus. They're the precise quantity required to stop thinking about this forever.

And the finding that should take all the pressure off: Lally measured what happened after a missed day. "Immediately following a missed opportunity, automaticity decreased by an average of 0.29 points... a very small decrease," and "there were no longer-term costs associated with a single omission."

One missed day costs you essentially nothing. What genuinely damages habit formation is stopping for a week or more— which is precisely, exactly what "pausing my subscription" means in practice.

So don't try harder. Anchor it. Gardner, Lally & Wardle, 2012, British Journal of General Practice: "A cue located within an existing daily routine... provides a convenient and stable starting point." Repeat the behaviour in the same context until it's "automatic and effortless." And their warning: "Variation may stave off boredom, but is effortful and... incompatible with development of automaticity."

The protocol:

1. One scoop, one glass, one place, one moment. With your first meal — the way Chinnappan's men took their 200 mg of tongkat ali, once daily after breakfast, for eighty-four days.
2. Anchor it to coffee. It's the best cue most men own: daily, non-negotiable, already on the counter. The bag lives beside the kettle or in the fridge. Not in the pantry.
3. Same glass, same shaker, same order, every day. Don't optimise the ritual. Automate it.
4. Miss a day? Take it tomorrow and don't audit yourself. 0.29 points. Nothing. Missing a week is the only real failure mode.
5. Judge this at twelve weeks. Not twelve days. Twelve weeks is the horizon every study on this page used — and in Chinnappan the numbers were still climbing when the trial ended.

Part 6: Give the extra bag away

If you're genuinely a bag ahead, there's a far better answer than cancelling.

Give it to a man who needs it.

That's not a marketing line. You almost certainly know a guy sitting exactly where the men in these trials started — the 50-to-70 cohort in Chinnappan with total testosterone under 300 ng/dL and an Aging Males' Symptoms score of 58. The friend who's tired in a way sleep doesn't fix. Your brother who's stopped training. The guy at work who's stopped mentioning the gym at all.

Hand him the spare bag with one instruction: every morning, with your coffee, for eighty-four days. Then keep taking yours.

You both run the protocol the studies actually used. In twelve weeks you've got a man to compare notes with — which is, not incidentally, the most reliable adherence device ever invented.

That's the Arena. Not a slogan. Two men who both showed up every morning for three months, instead of one man who quit at week five — five weeks before his sleep would have measurably improved, and seven weeks before his testosterone hit its peak.

The bottom line

Every number on this page came from a fixed dose taken every single day for weeks:

• Tongkat ali, 200 mg/day — our exact dose: nothing significant at week 2. Significant at week 4. Strongest at week 12 and still climbing. AMS score 58.3 → 26.7. Meta-analysis effect size 1.35.
• KSM-66 ashwagandha: cortisol −32.6% at eight weeks (and −16.5% at half our dose). Bench press +46 kg versus +26 kg placebo. Testosterone +96 ng/dL versus +18. Body fat −3.5%. Sleep latency significant only at week 10.
• Maca, 1,500 mg/day: libido improvement from week 8 — and completely invisible to a hormone panel.
• Spirulina: systolic pressure moved from week four, not week three. Four months of daily dosing moved immune and antioxidant markers.
• Forskolin: free testosterone up, body fat down, bone mass changed — over twelve weeks.
• Ashwagandha and fertility: sperm count +167% at ninety days. Registered by the men only at the end.
• Muscle fibre growth: measurable at week 10. Not week 3.
• Stop taking it, and the hormonal gains measurably reverse.
• New daily habits reach automaticity at a median of 66 days. Two bags.

You're not overstocked. You're mid-protocol, holding precisely the amount of product the research says it takes to finish — and about two bags from never having to think about this again.

Don't pause. Put the bag next to the kettle, take it tomorrow morning, and give the spare to a man who's still standing where you were.

Keep going. You're much closer than you feel.

→ Man Greens

References

1. Chinnappan SM, et al. Efficacy of Eurycoma longifolia on testosterone, muscular strength and quality of life in men. Food & Nutrition Research. 2021;65. doi:10.29219/fnr.v65.5647
2. Talbott SM, Talbott JA, George A, Pugh M. Effect of Eurycoma longifolia extract on stress hormones and psychological mood state in moderately stressed subjects. J Int Soc Sports Nutr. 2013;10:28. doi:10.1186/1550-2783-10-28
3. Tambi MI, Imran MK, Henkel RR. Standardised water-soluble extract of Eurycoma longifolia on men with late-onset hypogonadism. Andrologia. 2012;44(Suppl 1):226–230. doi:10.1111/j.1439-0272.2011.01168.x
4. Henkel RR, et al. Tongkat Ali as a potential herbal supplement for physically active male and female seniors — a pilot study. Phytother Res. 2014;28(4):544–550. doi:10.1002/ptr.5017
5. Leisegang K, et al. Eurycoma longifolia on serum testosterone: a systematic review and meta-analysis. Medicina. 2022;58(8):1047. doi:10.3390/medicina58081047
6. Salve J, Pate S, Debnath K, Langade D. Adaptogenic and anxiolytic effects of ashwagandha root extract in healthy adults. Cureus. 2019;11(12):e6466. doi:10.7759/cureus.6466
7. Chandrasekhar K, Kapoor J, Anishetty S. A prospective, randomized double-blind, placebo-controlled study of a high-concentration full-spectrum extract of ashwagandha root. Indian J Psychol Med. 2012;34(3):255–262. doi:10.4103/0253-7176.106022
8. Wankhede S, Langade D, Joshi K, Sinha SR, Bhattacharyya S. Examining the effect of Withania somniferasupplementation on muscle strength and recovery. J Int Soc Sports Nutr. 2015;12:43. doi:10.1186/s12970-015-0104-9
9. Choudhary B, Shetty A, Langade DG. Efficacy of ashwagandha in improving cardiorespiratory endurance in healthy athletic adults. AYU. 2015;36(1):63–68. doi:10.4103/0974-8520.169002
10. Langade D, Kanchi S, Salve J, Debnath K, Ambegaokar D. Efficacy and safety of ashwagandha root extract in insomnia and anxiety. Cureus. 2019;11(9):e5797. doi:10.7759/cureus.5797
11. Ambiye VR, et al. Clinical evaluation of the spermatogenic activity of the root extract of ashwagandha in oligospermic males. Evid Based Complement Alternat Med. 2013;2013:571420. doi:10.1155/2013/571420
12. Gonzales GF, et al. Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men. Andrologia. 2002;34(6):367–372. doi:10.1046/j.1439-0272.2002.00519.x
13. Gonzales GF, et al. Effect of Lepidium meyenii (Maca) on serum reproductive hormone levels in adult healthy men. J Endocrinol. 2003;176(1):163–168.
14. Zenico T, Cicero AFG, Valmorri L, Mercuriali M, Bercovich E. Subjective effects of Lepidium meyenii extract on well-being and sexual performance in patients with mild erectile dysfunction. Andrologia. 2009;41(2):95–99.
15. Godard MP, Johnson BA, Richmond SR. Body composition and hormonal adaptations associated with forskolin consumption in overweight and obese men. Obes Res. 2005;13(8):1335–1343. doi:10.1038/oby.2005.162
16. Kalafati M, et al. Ergogenic and antioxidant effects of spirulina supplementation in humans. Med Sci Sports Exerc. 2010;42(1):142–151. doi:10.1249/MSS.0b013e3181ac7a45
17. Torres-Durán PV, Ferreira-Hermosillo A, Juárez-Oropeza MA. Antihyperlipemic and antihypertensive effects of Spirulina maxima. Lipids Health Dis. 2007;6:33. doi:10.1186/1476-511X-6-33
18. Park HJ, et al. A randomized double-blind, placebo-controlled study to establish the effects of spirulina in elderly Koreans. Ann Nutr Metab. 2008;52(4):322–328. doi:10.1159/000151486
19. Machowiec P, et al. Effect of spirulina supplementation on systolic and diastolic blood pressure: systematic review and meta-analysis. Nutrients. 2021;13(9):3054. doi:10.3390/nu13093054
20. Grube BJ, Eng ET, Kao YC, Kwon A, Chen S. White button mushroom phytochemicals inhibit aromatase activity and breast cancer cell proliferation. J Nutr. 2001;131(12):3288–3293.
21. Chen S, et al. Anti-aromatase activity of phytochemicals in white button mushrooms. Cancer Res. 2006;66(24):12026–12034.
22. Shrestha RP, et al. Models for the red blood cell lifespan. J Pharmacokinet Pharmacodyn. 2016;43(3):259–274. doi:10.1007/s10928-016-9470-4
23. Misell LM, et al. A stable isotope-mass spectrometric method for measuring human spermatogenesis kinetics in vivo. J Urol. 2006;175(1):242–246.
24. Eriksen EF. Cellular mechanisms of bone remodeling. Rev Endocr Metab Disord. 2010;11(4):219–227. doi:10.1007/s11154-010-9153-1
25. Damas F, et al. Resistance training-induced changes in integrated myofibrillar protein synthesis are related to hypertrophy only after attenuation of muscle damage. J Physiol. 2016;594(18):5209–5222.
26. Simons DJ, Franconeri SL, Reimer RL. Change blindness in the absence of a visual disruption. Perception. 2000;29(10):1143–1154.
27. Ettehad D, et al. Blood pressure lowering for prevention of cardiovascular disease and death: a systematic review and meta-analysis. Lancet. 2016;387(10022):957–967.
28. Cholesterol Treatment Trialists' (CTT) Collaboration. Efficacy and safety of more intensive lowering of LDL cholesterol: a meta-analysis of data from 170,000 participants in 26 randomised trials. Lancet. 2010;376(9753):1670–1681.
29. de Koning EJ, et al. Vitamin D supplementation for the prevention of depression and poor physical function in older persons: the D-Vitaal study. Am J Clin Nutr. 2019;110(5):1119–1130.
30. Lopresti AL, Drummond PD, Smith SJ. A randomized, double-blind, placebo-controlled, crossover study examining the hormonal and vitality effects of ashwagandha in aging, overweight males. Am J Mens Health. 2019;13(2):1557988319835985. doi:10.1177/1557988319835985
31. Kapil V, Khambata RS, Robertson A, Caulfield MJ, Ahluwalia A. Dietary nitrate provides sustained blood pressure lowering in hypertensive patients. Hypertension. 2015;65(2):320–327. doi:10.1161/HYPERTENSIONAHA.114.04675
32. Kreider RB, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation. J Int Soc Sports Nutr. 2017;14:18. doi:10.1186/s12970-017-0173-z
33. Lally P, van Jaarsveld CHM, Potts HWW, Wardle J. How are habits formed: modelling habit formation in the real world. Eur J Soc Psychol. 2010;40(6):998–1009. doi:10.1002/ejsp.674
34. Gardner B, Lally P, Wardle J. Making health habitual: the psychology of "habit-formation" and general practice. Br J Gen Pract. 2012;62(605):664–666.

---

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Studies cited investigated individual ingredients rather than the finished Man Greens formula, and in several cases used doses, ingredient forms or populations that differ from those in Man Greens — where that's the case, we've said so in the text. Individual results vary. If you take prescription medication or have a diagnosed medical condition, speak with your physician before beginning any supplement.