An ingredient-by-ingredient look at GenF20 Plus safety, using the product's own clinical trial and NIH and Mayo Clinic information on its ingredients.
GenF20 Plus is generally tolerated at the label dose. In its 2015 trial, side effects were mostly mild heartburn and stomach pain, at a similar rate to placebo. But its L-arginine and GABA can lower blood pressure, arginine and chromium can lower blood sugar, and it is not a good fit for anyone pregnant, with a cancer history, or taking nitrates, blood pressure or diabetes drugs without a doctor's okay.
GenF20 Plus is a two-part "HGH releaser" system from Leading Edge Health: enteric-coated tablets plus an oral spray. It contains no growth hormone. The idea is that a blend of amino acids and other ingredients nudges your body to release more of its own, which is a much weaker claim than the marketing suggests.
As of October 2026, the official GenF20 site lists these tablet amounts:
| Ingredient | Amount listed | Type |
|---|---|---|
| L-arginine | 130 mg | Amino acid |
| L-glutamine | 115 mg | Amino acid |
| L-glycine, L-lysine, L-tyrosine | 100 mg each | Amino acids |
| Astragalus root extract | 60 mg | Herb |
| Deer antler velvet | 50 mg | Animal product |
| GABA | 50 mg | Neurotransmitter compound |
| Colostrum (bovine) | 50 mg | Animal product |
| L-valine | 40 mg | Amino acid |
| Anterior pituitary powder | 30 mg | Animal gland extract |
| Phosphatidyl choline | 25 mg | Phospholipid |
| L-ornithine | 25 mg | Amino acid |
| GTF chromium | 0.1 mg | Mineral |
The site's separate ingredients page names 16 ingredients, adding L-isoleucine and Tribulus terrestris without amounts. We could not find the oral spray's ingredients anywhere on the official site. That matters for safety: you can't weigh the risks of something whose contents you don't know, so read the spray label before you use it and show it to your pharmacist.
These are small doses. The 130 mg of arginine in a serving is a fraction of the grams-per-day amounts used in most arginine research. Small doses lower the odds of side effects, but they also make it harder to see how the formula could do much, a point we cover in our look at whether GenF20 Plus works.
GenF20 Plus has one published trial, a 12-week placebo-controlled study by Sonawane and colleagues in the Open Access Journal of Clinical Trials (2015). It enrolled adults aged 35 to 65 in India, and 61 finished (31 on GenF20 Plus, 30 on placebo). Participants used two tablets plus 2 mL of the liquid under the tongue, morning and evening.
The authors reported 12 adverse events: 7 in the GenF20 Plus group and 5 on placebo. Ten were digestive, mostly hyperacidity (8 cases) plus 2 cases of abdominal pain. There was also one headache and one skin eruption below the eyes. Two of the abdominal pain events were rated moderate, the rest mild, and all resolved. No serious adverse events were reported.
That is a reasonable safety signal for healthy adults over three months, but it is limited. The trial was small, short and excluded people with significant illness, so it could not detect rarer reactions or drug interactions. It was run by Vedic Lifesciences, a contract research organization, with financial support from a company called DM Contact Management.
The official FAQ says there are "no known side effects," while also admitting the company can't guarantee safety for any individual. The company's own study recorded stomach complaints, so expect that heartburn or stomach upset is possible.
Mayo Clinic lists nausea, abdominal pain, diarrhea, bloating, gout and headache as possible side effects, and says arginine can worsen allergies or asthma. It is not recommended after a recent heart attack. The bigger issue is interactions: arginine may push blood pressure too low when combined with blood pressure medicines, nitrates or sildenafil, and may lower blood sugar alongside diabetes drugs. It may also raise bleeding risk with anticoagulants, and Mayo advises against combining it with potassium-sparing diuretics such as spironolactone.
People prone to cold sores or genital herpes sometimes avoid arginine because cell-culture research on arginine and lysine found the herpes simplex virus depends on arginine to grow, with lysine working against it. Whether a 130 mg dose triggers outbreaks in people has not been shown, but if you get frequent outbreaks, ask your doctor.
A United States Pharmacopeia safety review found no serious safety concerns at the doses studied. It did note a temporary, moderate drop in blood pressure in some studies, so stacking it with blood pressure medication could add to that effect. Other reports include drowsiness, headache and stomach discomfort. The reviewers found no data in pregnancy or breastfeeding and advised caution there.
The National Center for Complementary and Integrative Health (NCCIH) says astragalus may interact with drugs that suppress the immune system and might worsen autoimmune disease. Animal research suggests it may be toxic to a developing fetus, and a thorough safety evaluation has not been done.
The NIH Office of Dietary Supplements notes chromium may add to the blood sugar-lowering effect of insulin and other diabetes drugs, and taken at the same time it reduced levothyroxine absorption in a small study. The 0.1 mg here is modest, but if you take thyroid medication, separate the doses by a few hours.
Deer antler velvet, bovine colostrum and anterior pituitary powder are animal products, which rules GenF20 Plus out for vegetarians and vegans and for anyone with a dairy (colostrum) allergy. The site does not say which animal the pituitary powder comes from. Deer antler velvet is marketed as a source of IGF-1, and the Defense Department's Operation Supplement Safety program warns that velvet products may contain IGF-1, a substance banned in tested sports. For Tribulus, the NIH's LiverTox entry describes mild stomach upset and rare liver and kidney case reports, mostly at high doses.
No one has tested GenF20 Plus with prescription drugs, so treat the ingredients' known interactions as the product's:
Stop taking it and get medical help if you notice chest pain, fainting, severe stomach pain, swelling, yellowing of the skin or eyes, or a widespread rash.
GenF20 Plus uses low doses of fairly common ingredients, and its only trial reported mostly mild stomach complaints at a similar rate to placebo. For a healthy adult on no medication, the risk looks low. That is not the same as risk-free: the arginine, GABA and chromium can interact with blood pressure, nitrate and diabetes drugs, the spray's contents are not disclosed on the official site, and the product's whole premise of raising growth hormone and IGF-1 makes it a poor choice for anyone with a cancer history. If you take any prescription, talk to your doctor first. For our full verdict on value and results, see our GenF20 Plus review.