Welcome to Ray Kurzweil & Terry Grossman’s Health Products
Science is quickly developing the technologies needed to radically extend the quality human lifespan. Meanwhile, we need to stay healthy long enough to take advantage of these scientific breakthroughs.
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5-HTP 100mg

Supplementing with 5-HTP may:

  • Help regulate appetite
  • Improve mood
  • Assist in maintaining healthy sleep patterns

5-HTP (5-hydroxytryptophan) is produced in the body from the amino acid tryptophan and is involved in nervous system health.1 It is a precursor to serotonin, a neurotransmitter involved in mood regulation, sleeping patterns, appetite, sexuality, and emotional states such as anger and aggression.2,3 5-HTP increases serotonin levels in the brain, which can help promote a calm mood and healthy sleep patterns.4

Unlike tryptophan, 5-HTP can easily cross the blood-brain barrier, making it effective for increasing serotonin levels in the central nervous system. Oral doses of 5-HTP are well-absorbed into the blood stream because it is not affected by other amino acids in digestion and it does not need a specific transport molecule.5

Vitamin B6 works with 5-HTP to create serotonin.6 If you are taking a B vitamin supplement, such as our B-Complex, you may wish to take the two products at the same time to optimize effectiveness.

Supplement Facts
Serving Size: Veggie Capsule% Daily Value
5-HTP (5-hydroxytryptophan)
100 mg*
*% Daily Value Not Established

Other Ingredients: Rice flour and Cellulose (capsules).

CAUTION: If you are currently taking antidepressant medication please consult a physician prior to use. May cause drowsiness.

Dosage: Take one or more capsule(s) daily, preferably on an empty stomach. To aid in sleep, take at bedtime.

Ray & Terry‘s  5-HTP, 100 mg contains 60 vegetarian capsules per bottle.

No additional information

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  1. Shaw K, Turner J, Del Mar C."Tryptophan and 5-hydroxytryptophan for depression." Cochrane Database Syst Rev. 2002;(1):CD003198.
  2. Caspi N, Modai I, Barak P, Waisbourd A, Zbarsky H, Hirschmann S, Ritsner M. (2001 Mar). "Pindolol augmentation in aggressive schizophrenic patients: a double-blind crossover randomized study". Int Clin Psychopharmacol. 16(2): 111-5.
  3. Caspi A, Sugden K, Moffitt TE, Taylor A, Craig IW, Harrington H, McClay J, Mill J, Martin J, Braithwaite A, Poulton R."Influence of life stress on depression: moderation by a polymorphism in the 5-HTT gene." Science. 2003 Jul 18;301(5631):386-9.
  4. Wurtman RJ, Hefti F, Melamed E (1980). "Precursor control of neurotransmitter synthesis". Pharmacol. Rev. 32 (4): 315-35.
  5. Birdsall TC."5-Hydroxytryptophan: a clinically-effective serotonin precursor." Altern Med Rev. 1998 Aug;3(4):271-80.
  6. Jpn. J. Pharmacol. 32 (5): 803-11."Effect of pyridoxal phosphate deficiency on aromatic L-amino acid decarboxylase activity with L-DOPA and L-5-hydroxytryptophan as substrates in rats." Rahman MK, Nagatsu T, Sakurai T, Hori S, Abe M, Matsuda M (1982).