NOW Foods sells 5-HTP in three strengths at Supps247: 5-HTP 50 mg, 5-HTP 100 mg and Double Strength 5-HTP 200 mg. 5-HTP is a compound the body makes from tryptophan and uses to make serotonin.
At a glance
| Strength | Note |
|---|---|
| 50 mg | The lowest strength and the sensible place to start |
| 100 mg | The standard strength |
| 200 mg | Double strength |
What to know
5-HTP has been studied for sleep and mood, but most trials are small and short. It should not replace treatment from your doctor.
Who should check first
- Taking antidepressants: do not take 5-HTP with SSRIs, SNRIs, MAOIs or tricyclic antidepressants unless your doctor tells you to. Combining them can cause serotonin syndrome, which is a medical emergency.
- Other serotonin medicines: the same applies to tramadol, triptan migraine medicines, dextromethorphan cough medicines and St John's wort.
- Pregnant, breastfeeding or under 18: do not use it.
- Low mood or poor sleep that lasts: see your GP.
How to use and where to buy
Do not exceed the label. Get medical help straight away if you notice agitation, a racing heart, sweating, shaking or a high temperature. Shop them online at Supps247 with Australia-wide delivery or click and collect, or browse more from NOW Foods.
Checked against the product listings on 12 November 2026. Always read the label and follow the directions. General information, not medical advice.
