Conclusion: Supplementation of some but not all micronutrients may benefit cardiometabolic health. This study highlights the importance of micronutrient diversity and the balance of benefits and risks to promote and maintain cardiovascular health in diverse populations. (Antioxidant Supplementation in the Prevention and Treatment of Cardiovascular Diseases; CRD42022315165).
PubMed 36480969 ↗L-Arginine
People mainly take L-Arginine for libido, heart & lipids, performance. Based on 146 first-hand reports and 106 meta-analyses & systematic reviews in the medical literature. Ranked #158 of 2,750 overall.
Of reports that state an outcome, 53% are positive.
What L-Arginine does, according to users
Of the people who reported each effect, the share who said it got better.
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: L-Arg displays biological activities in pregnancies complicated by HDP and growth restriction, both in women and animal models. L-Arg administration is safe and could be a candidate as an intervention beneficial to maternal and fetal outcomes, at least in moderate clinical disorders.
PubMed 37258415 ↗Conclusion: Foods rich in polyphenols and nitrate provide trivial benefits for endurance exercise performance, although these effects may be food dependent. Highly trained endurance athletes do not appear to benefit from consuming nitrate-rich foods but may benefit from polyphenol consumption. Further research into food sources, dosage and supplementation duration to optimise the ergogenic response to polyphenol consumption is warranted. Further studies should evaluate whether differential sex-based responses to nitrate and polyphenol consumption are attributable to physiological differences or sample siz
PubMed 34965876 ↗Conclusion: The increased cardiovascular risk in menopause stems from the exaggerated effects of changing physiology on the cardiovascular system affecting peripheral, cardiac and cerebrovascular beds. The differential effects of menopause on cardiovascular disease at the subclinical, biochemical and molecular levels form the highlights of this review.
PubMed 33155924 ↗Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“currently taking: glucosamine, whey protein, l-arginine, multivitamin, omega 3, magnesium, collagen (7g)”
“I tried different forms and dosages of Magnesium, Zinc, L-Tyrosine, melatonin, L-Arginine, ALPHA-GPC... most of them didn't provide any meaningful and noticeable benefits”
“significant boosted HGh with L-Arginine /L-Lysine 2 grams on an empty stomach before bed.”
“Oral treatment with L-lysine and L-arginine reduces anxiety and basal cortisol levels in healthy humans.”
“l-arginine is the precursor to nitric oxide, should theoretically do the same thing as piracetam except much better.”
Top discussions (5)
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Other options for libido
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 3, 2026. How we rate