Solaray 5 HTP Review

Editor's Review: 3.5 / 5.0

What You Should Know

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Prescription weight loss medications come in two varieties – appetite suppression and anti-depressant. Solaray 5 HTP works in much the same way as prescription weight loss medications as it causes nausea in large doses and promotes serotonin levels so the dieters feels better about dieting. Increases serotonin levels may be safe for some dieters, but dieters taking anti-depressant medications should not take 5 HTP. Solaray 5 HTP contains 50 mg of 5-hydroxytryptophan. Studies supporting weight loss from taking 5 HTP supplied 300 mg to dieters in one dose. Taking just 50 mg will not decrease appetite or dramatically increase mood.

List of Ingredients

L-5 Hydroxytryptophan (as griffonia simplicifolia).

Product Features

Solaray 5 HTP is an inexpensive supplements available in 50 mg capsules. The Solaray website does not claim 5 HTP will improve weight loss, but that is not uncommon. Studies designed to promote the use of 5 HTP for weight loss, typically do not state the supplement definitely promotes losing weight. Many times, researchers allude to that result.

5 HTP does not directly influence weight loss. It does cause nausea for the first 6 weeks or so and that is why dieters taking 5 HTP may lose weight. This result is noted when dieters take 300 mg of 5 HTP, not 50 mg as delivered in this supplement. It is also important to note that taking 5 HTP for more than 6 weeks reduces this side effect, so dieters may resume normal eating habits.

Solaray 5 HTP is proven to boost mood, but the supplement affects serotonin levels, so it is not safe for all dieters. There is a warning in the Solaray product description stating that dieters taking MAOI anti-depressant medications should not take Solaray 5 HTP. Furthermore, the supplement may lower blood pressure and cause the dieter to feel sleepy.

There are multiple 5 HTP supplements sold by Solaray. Some contain St. John’s Wort, another mood boosting supplement. St. John’s Wort is especially dangerous for dieters with mood disorders.

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  • There is an official website for Solaray supplements.
  • 5 HTP is clinically proven to reduce appetite.
  • May improve sleep and mood.
  • Less expensive than other weight loss products.
  • Sold online in various strengths.


  • May cause extreme nausea.
  • Proven to boost weight loss at 300 mg per dose, not 50 or 100 mg.
  • Affects mood; not safe for dieters with mood disorders.
  • After 6 weeks, the supplement no longer controls appetite.

Some Solaray 5 HTP products contains St. John’s Wort.


The weight loss market is flooded with natural and prescription medications to help dieters achieve weight loss goals. Solaray 5 HTP is a supplement that has some clinical backing, but not for the right reasons. Taking 300 mg of 5 HTP will cause nausea, thus the dieter does not feel like eating. There is no other proven effect that supports weight loss in any way. The supplement will affect mood.

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