Price: $11.42 ($0.13 / Count) Free Shipping for Prime Members
FREE Shipping
Get free shipping
Free 5-8 business-day shipping within the U.S. when you order $25 of eligible items sold or fulfilled by Amazon.
Or get 4-5 business-day shipping on this item for $5.02. (Prices may vary for AK and HI.)
Learn more about free shipping
on orders over $25—or get FREE Two-Day Shipping with Amazon Prime
Price: $10.85 ($0.12 / Count) $11.42 Save $0.57 (5%)
Price: $11.42
In Stock. Ships from and sold by Amazon.com. Gift-wrap available.
In Stock. Ships from and sold by Amazon.com.

2 Styles: 50 mg
50 mg
Select in
100 mg
Select in
2 Sizes: 90 Capsules
90 Capsules
Select in
60 Capsules
Select in


Subscribe & Save:


Cancel anytime. Already a member? Sign in

One-time purchase:

To see addresses, please
or
Please enter a valid US zip code.
or
Jarrow Formulas 5-HTP 50m... has been added to your Cart

Other Sellers on Amazon
Add to Cart
$13.95 ($0.16 / Count)
+ Free Shipping
Sold by: Nutricelebrity
Add to Cart
$13.96 ($0.16 / Count)
& FREE Shipping on eligible orders. Details
Sold by: Wellica Inc
Add to Cart
$11.44 ($0.13 / Count)
+ $2.65 shipping
Sold by: HerbsPro

Jarrow Formulas 5-HTP 50mg, Brain and Memory Support, 90 Caps

4.0 out of 5 stars 262 customer reviews
About the product
  • 5-Hydroxytryptophan Capsules
  • May Be Useful In Promoting Mental Health (as a precursor to serotonin)
  • Melatonin Precursor: May Promote Sleep

Frequently bought together

  • Jarrow Formulas 5-HTP 50mg, Brain and Memory Support, 90 Caps
  • +
  • Jarrow - L-Tyrosine 500MG - 100 Caps
Total price: $21.31
Buy the selected items together

Customers also bought

Jarrow - L-Tyrosine 500MG - 100 Caps
$9.89
Added to Cart
Added to your Cart


Have a question?

Find answers in product info, Q&As, reviews

Please make sure that you are posting in the form of a question.

Don't see what you're looking for?
There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews

Product description

Style:50 mg  |  Size:90 Capsules

Product Profile

5-Hydroxytryptophan (5-HTP) is an amino acid naturally produced by the body from the essential amino acid L-tryptophan. 5-HTP is the immediate precursor to serotonin (5-hydroxytryptamine, 5-HT) and also a precursor to melatonin. In the brain, serotonin and melatonin help regulate sleep, mood, temperature, and appetite. As such, 5-HTP and L-tryptophan are often taken as supplements to support these roles.* Yet even though L-tryptophan can be transformed into 5-HTP in the body, the two should not be considered interchangeable for supplement use. The conversion of tryptophan to 5-HTP is the rate-limiting step in neurotransmitter production and, in addition, L-tryptophan is utilized for a variety of other purposes in the body leading to less serotonin support than may be assumed. In purified form, humans have been consuming 5-HTP for over forty years.


Distinguishing Features:

  • Sourced botanically from Griffonia simplicifolia
  • Serotonin & melatonin precursor
5-HTP vs. L-Tryptophan

The body uses L-tryptophan for other metabolic purposes besides serotonin and melatonin production. For example, L-tryptophan is incorporated into proteins and also acts as a precursor in niacin biosynthesis. L-tryptophan absorption in the intestines requires a shared amino acid transporter, meaning that competition with other amino acids from dietary sources can lead to poor L-tryptophan absorption. A similar specific, active transport mechanism is required for L-tryptophan entry into the brain. A number of other physiological and biochemical parameters, such as stress, insulin response, and vitamin B6 levels can conspire to prevent L-tryptophan from becoming serotonin.

In contrast, 5-HTP is not incorporated into proteins and cannot be used to produce niacin. 5-HTP does not require an intestinal transporter for absorption and is absorbed well even in the presence of other amino acids from food, with about 70 percent of that ingested ending up in the bloodstream. Also, since 5-HTP participates in fewer biosynthetic pathways it is inherently less susceptible to metabolic diversion. The only hindrance of importance for ingested 5-HTP is the activity of peripheral decarboxylase enzymes, which can convert 5-HTP to serotonin before crossing the blood-brain barrier. However, the results observed in 5-HTP research demonstrate that this is not a major concern.

Serotonin & The Second Brain

Some now use the phrase “our second brain” to refer to the impact our digestive tract can have on the entirety of the body. An example of this is the gut-brain axis, which involves extensive bidirectional signaling and feedback between gut and brain. For anyone who has attempted to diet in the past, this may already be understood experientially.

Serotonin plays a significant, yet not completely understood role in the human digestive tract and gut-brain axis. In fact, research demonstrates 5-HTP may even affect leptin, which helps to regulate energy intake and appetite.* Such a connection may help explain results in overweight individuals who were able to exert much better control over their diets when taking 5-HTP.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


Product details

Style: 50 mg | Size: 90 Capsules
  • Product Dimensions: 6 x 5 x 4 inches ; 1 pounds
  • Shipping Weight: 0.6 ounces (View shipping rates and policies)
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B0013OVSWG
  • UPC: 790011150442
  • Item model number: HTP50
  • Average Customer Review: 4.0 out of 5 stars 262 customer reviews
  • Amazon Best Sellers Rank: #10,993 in Health & Household (See Top 100 in Health & Household)
  • Would you like to tell us about a lower price?


Important information

Ingredients
5-HTP (5-Hydroxytryptophan), Cellulose, magnesium stearate (vegetable source) and silicon dioxide. Capsule consists of gelatin.

Legal Disclaimer
Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. Please see our full disclaimer below.

Customer Questions & Answers

Customer reviews

Top customer reviews

on January 13, 2016
Style: 100 mg|Size: 60 Capsules|Verified Purchase
0Comment| 44 people found this helpful. Was this review helpful to you?YesNoReport abuse
on August 31, 2016
Style: 50 mg|Size: 90 Capsules|Verified Purchase
0Comment| 30 people found this helpful. Was this review helpful to you?YesNoReport abuse
on May 6, 2017
Style: 100 mg|Size: 60 Capsules|Verified Purchase
0Comment| One person found this helpful. Was this review helpful to you?YesNoReport abuse
on February 19, 2017
Style: 100 mg|Size: 60 Capsules|Verified Purchase
0Comment| 2 people found this helpful. Was this review helpful to you?YesNoReport abuse
on March 9, 2017
Style: 100 mg|Size: 60 Capsules|Verified Purchase
0Comment|Was this review helpful to you?YesNoReport abuse
on June 1, 2017
Style: 100 mg|Size: 60 Capsules|Verified Purchase
0Comment|Was this review helpful to you?YesNoReport abuse
on August 16, 2017
Style: 100 mg|Size: 60 Capsules|Verified Purchase
0Comment|Was this review helpful to you?YesNoReport abuse
on May 3, 2017
Style: 50 mg|Size: 90 Capsules|Verified Purchase
0Comment|Was this review helpful to you?YesNoReport abuse

Most recent customer reviews

Set up an Amazon Giveaway

Jarrow Formulas 5-HTP 50mg, Brain and Memory Support, 90 Caps
Amazon Giveaway allows you to run promotional giveaways in order to create buzz, reward your audience, and attract new followers and customers. Learn more about Amazon Giveaway
This item: Jarrow Formulas 5-HTP 50mg, Brain and Memory Support, 90 Caps

Pages with related products. See and discover other items: filtration media, 1 Gallon Fish Tank Filter

Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.