N-Acetylcysteine vs 5-HTP

for mood

Stronger evidence: tie

Stronger effect: tie

Safety: 5-HTP carries a serious interaction; N-Acetylcysteine has none recorded.

For mood, the two are evidence-matched; the difference is in effect and safety.

grade C low certainty

preliminary evidence as an adjunct in some psychiatric conditions; not established as a standalone

1200–2400 mg/day, adults

grade C low certainty

preliminary antidepressant signal; small, lower-quality studies

sources: PMID:10000012 · PMID:00000035