How much can supplements help?
Many supplements claim to boost male hormones, stamina or erections, but they are not treatments for low testosterone or erectile dysfunction for everyone.[1]
The key distinction is between correcting a real deficiency, which is beneficial, and taking high doses in the hope of enhancing performance, which usually does not work and may be harmful.[1]
Evidence-based choices reduce cost and risk
Choosing based on evidence reduces unnecessary expense and the risk of supplement toxicity.[1] Relying on supplements can also delay finding important causes, such as diabetes or cardiovascular disease, which often first show up as erection problems.[3]
How common are deficiencies?
Deficiency rates vary with diet, illness and population.[1] Fatigue or erection problems alone do not mean a zinc or vitamin deficiency.
Why more is not better
Correcting a deficiency helps the body work normally, but once levels are adequate, taking more does not raise hormones or improve performance.[1],[2]
Zinc, for example, is needed for hormone and sperm production, but in people who already get enough, extra zinc does not increase testosterone.[1]
What to check
Good assessment starts with[1],[2]:
- Reviewing your diet.
- Health conditions, such as bowel disease that impairs absorption.
- All medicines and products, including supplements and herbal remedies.
- Testing only when deficiency is suspected, not testing everything in everyone.
Using supplements sensibly and safely
Beware high doses. Excess zinc can cause copper deficiency and interfere with absorption of some medicines, such as certain antibiotics. The NIH sets the adult upper limit at 40 mg per day.[1]
Tell your doctor about every product you take, so interactions can be checked.[2]
Supplements do not replace food or indicated medical treatment.[2]
Be cautious with products of unclear content, especially those promising sexual enhancement. Some have been found to contain undeclared prescription drugs, which can be dangerous with heart medicines.[2]
How we care for you at Dr. Kris Clinic
We review the supplements you take without judgement, test for deficiency when indicated and look for medical causes of sexual problems, such as diabetes, blood pressure or hormones, in English or Thai.
If you want to improve your sexual health, we plan evidence-based treatment rather than relying on marketing claims.
Frequently asked questions
Will zinc raise my testosterone?
Only if you are deficient. If you already get enough, more zinc will not help and may harm.
Are natural supplements safe?
Not always. Some have side effects or interactions, and some products contain undeclared ingredients.
Should I test all my vitamin levels?
Not necessarily. Test when deficiency is suspected from symptoms, diet or health conditions.
Can sexual-enhancement supplements replace medicine?
They should not, and some may contain dangerous hidden drugs. Talk to a doctor.
Use supplements for a reason, and investigate symptoms rather than relying on claims.[1] More is not better.
Talk to a doctor about this
Confidential care in Surat Thani, the mainland gateway to Koh Samui, Koh Phangan and Koh Tao. Tue–Fri 17:00–20:00 · Sat–Sun 10:00–15:00 (UTC+7)
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Dr. Krida Uakridathikarn (Dr. Kris)
Board-certified family physician with certificate training in clinical sexology and sexual medicine. He works at Suratthani Hospital and provides sexual health, hormone and LGBTQ+ inclusive care at Dr. Kris Clinic. Profile and CV
References
- NIH Office of Dietary Supplements: Zinc—Health Professional Fact Sheet
- NIH: Dietary Supplements—What You Need to Know
- EAU Guidelines 2026: Management of Erectile Dysfunction
Keep reading
Main guide: Sexual wellbeing
Chronic Conditions and Sexual Health: Diabetes, Blood Pressure and Heart Disease
Sleep, Stress and Exercise: Foundations of Sexual Health
Weight, Hormones and Sexual Health: What You Should KnowThis article is general education, not personal medical advice or a promise of results. Diagnosis and treatment require assessment by a doctor. Content reflects the cited sources as of the update date.