5-Hydroxytryptophan by Thorne

If you’re searching for the best 5-HTP dose for sleep and find melatonin too groggy or short-acting, this fits. 5-HTP (5‑Hydroxytryptophan) is most useful for trouble falling asleep, low mood with carbohydrate cravings, and stress eating. The added vitamin B6 as P5P (the active form your enzymes use) helps your body convert 5-HTP efficiently. If your main issue is daytime fatigue rather than sleep onset, 5-HTP can feel sedating and may not be the right first step.

5-HTP crosses into the brain and is turned into serotonin (the neurotransmitter that steadies mood and appetite) by an enzyme that uses vitamin B6 as a cofactor. At night, some of that serotonin becomes melatonin (the sleep signal), which is why 5-HTP can ease sleep onset. Unlike tryptophan, it isn’t diverted into protein or niacin, so more goes toward serotonin. Many people notice calmer mood and fewer cravings within 1–2 weeks, and better sleep within the first few nights. Nausea happens when serotonin rises in the gut; taking with food usually solves it.

Thorne suggests 1–2 capsules three times daily. In practice, start low: 50–100 mg 30–60 minutes before bed for sleep. For mood or cravings, add 50–100 mg with breakfast and mid‑afternoon. Most people do well at 100–300 mg per day; higher intakes up to 300–600 mg are best done with a clinician. Take with a small snack to reduce nausea. If you’re tracking nutrients, “Vitamin B6, Plasma” can confirm you’re not low.

Skip 5-HTP if you take antidepressants that raise serotonin—SSRIs, SNRIs, MAOIs, or drugs like tramadol, linezolid, dextromethorphan, lithium, buspirone, or migraine triptans—or if you use St. John’s wort. Combining these raises the risk of serotonin syndrome (dangerous agitation, sweating, fast heart rate). Avoid in pregnancy or breastfeeding, with bipolar disorder (can trigger mania), carcinoid syndrome (already high serotonin), and with carbidopa for Parkinson’s.

People often ask if 5-HTP is better than melatonin. Use 5-HTP when mood and cravings matter alongside sleep; use melatonin when timing your body clock is the goal. Another question is labs—there’s no routine serotonin blood test to guide dosing, but checking Vitamin B6, Plasma is reasonable if you suspect deficiency.