PlainPill

Semax

People mainly take Semax for focus, mood, energy. Based on 256 first-hand reports and 0 meta-analyses & systematic reviews in the medical literature. Ranked #65 of 1,974 overall.

54
User score
Mostly positive
29% positive9% mixed7% negative55% unclear

Of reports that state an outcome, 64% are positive.

Clinical research
CLimited research
0
meta-analyses
1
RCTs
208
papers
High-risk compound. Peptides are not approved as supplements, carry serious and sometimes irreversible risks, are banned in competitive sport and may be restricted where you live. Nothing here is a recommendation to use it.

What Semax 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.

CLimited research

1–4 randomized controlled trials, no meta-analysis yet. The grade measures how much human research exists — read the conclusions below for what it found.

No meta-analyses or systematic reviews published yet — 1 randomized trials found.

Dosage people report

As stated by users — not a recommendation. Follow the label or your doctor.

1 vial4 days
200 mcgdaily
0.30 mgdaily
2-3 times dailyas reported
700 mcg-1 mgdaily
500 mcgdaily

Reported side effects

How often each side effect came up across all reports.

hair loss ×7headache ×5brain fog ×4tingling ×2fatigue ×2anxiety ×2irritability ×2sleep disruption ×1

What users say

Verbatim quotes, shortened only — each links to the original discussion.

“Qualia and Semax are hands down the most powerful nootropics, semax however can cause hair loss”
Source discussion ↗
“An amphetamine abuser on Longecity stated Semax helped him return to normal when nothing else did.”
Source discussion ↗
“I have only done 1 vial yet (4 days) but it was amazing. Especially for working memory and recall.”
Source discussion ↗
“My wife has Sema,selenk, Semax”
Source discussion ↗
“But do you really need 20 bottles of Kisspeptin or Semax?”
Source discussion ↗
Top discussions (5)

Other options for focus

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 2, 2026. How we rate