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324 reviews
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What is L-Serine?

L-Serine is a nonessential amino acid used in the biosynthesis of proteins that plays a part in a wide range of body functions.

L-Serine Benefits

L-Serine combines with fatty acids to create phosphatidylserine which may support brain function. It also converts into D-Serine, which may support the nervous system, and L-Serine is used by the body to create L-Tryptophan, a chemical that may support healthy sleep and mood.

  • May support brain function
  • May protect the nervous system
  • May promote healthy sleep
  • May aid healthy mood
  • May help boost muscle endurance

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.

Supplement Facts
Supplement Facts
Serving size: 2000 milligrams
Serving per container: *
Amount Per Serving % Daily Value**
L-Serine 2000mg *
* Daily Value not established.
** Based on 2,000 calorie diet


Sugar, soy, dairy, yeast, gluten, corn and additives.

As a dietary supplement, take 2000 mg daily, or as directed by physician.

Customer Reviews
4.8 Based on 324 Reviews
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Marlene j.
United States United States
I recommend this product

I am wondering why there is a cancer warning on the label. Will you address that please? I selected NO to recommending the product waiting for you response on the possibility that this can cause cancer.


Hello, In regard to the Prop 65 warning, we do add the Prop 65 warning to all of our products as a precaution for California residents since this is a requirement for items sold in the state of California, this is not for any particular hazard causing chemical in a product. California's Prop 65 standards are often more strict than federal standards; this law was established to allow Californians to make informed and cautious health decisions. Prop 65 maintains a list of roughly 800 chemicals classified as carcinogens and reproductive toxins, many of which are found in commonly eaten foods (Vitamin A, in fact, is included on this list when taken in higher doses). A warning does not necessarily indicate that the product is unsafe, and retailers outside of California might not include these warning labels if they are not required to do so. The classification of a chemical under Prop 65 may well be the result of laboratory animal testing’s, a method which is not always reliable. You can learn more about the Prop 65 labeling here:

Edward O.
United States United States
I recommend this product
Arrived right on time....

Ordered online at and received my order within a few days at a great price ! Thanks !

David L.
United States United States
I recommend this product

Have been taking it for a month. No change. Neutral. Neither yes nor no recommendation.

Stuart G.
United States United States
I recommend this product
My impressions of "Bulk Supplements and L-Serine

I was a bit disappointed that while filling out the order at your site, I specifically recall checking the option to have the product shipped via the method resulting in NO SHIPPING CHARGE. When I got the confirmation back via email, I noticed that the next choice up was checked. I immediately sent an email back requesting a correction in the shipping method and changing to FREE SHIPMENT. Regrettably, that change was not made. Although it wasn't a major cost, it just bothered me that I made the effort to catch the order in time to make the requested adjustment. I am not currently in the vicinity of my filing cabinet but believe I started taking the suggested 1/2 teaspoon of the product/day since receiving it about 3-4 weeks ago. As yet, I assume it will take longer than this short time before I can comment on my experience and if it seems to be working as advertised. (i.e. To help improve my memory.) My wife also started taking the same amount but began suffering from dry, extremely itchy skin. This problem was not relegated to just one area of her body but seemingly random in nature. When she stopped taking the supplement, the problem went away. As mentioned above, I haven't been taking the product long enough to notice any change and thus can't appropriately answer the following question about recommending it. The friend at my gym who suggested it to me is taking 1 teaspoon/day but although he's been using it for over a year, he can't be sure he's experienced any notable change AS FAR AS HE CAN REMEMBER!!!

john w.
United States United States
I recommend this product

aok, seems good quality and received quickly

United States United States
I recommend this product

I use it every day