L-tyrosine explained: what it is and food sources
The NIH says L-tyrosine is a form of the amino acid tyrosine. It occurs naturally in foods, mainly as part of proteins, and EFSA (the European Food Safety Authority) says dietary L-tyrosine comes from protein eaten from different sources. Three of the products we reviewed list L-tyrosine, but none prints its amount.
- What it is
- Amino acid
- In the products we reviewed
- 3, none prints the amount
What L-tyrosine is
- L-tyrosine occurs naturally in foods, mainly as part of proteins.2
- L-tyrosine is a form of the amino acid tyrosine.1
- Dietary L-tyrosine comes from protein eaten from different sources.2
- L-tyrosine can be taken as a food supplement.2
- L-tyrosine is the starting material for making catecholamines, including dopamine.2
How much L-tyrosine each product gives
Amount not printed: the dashed line shows the most it can be, the whole blend
The 3 products we reviewed that list L-tyrosine
| Product | Form and serving | L-tyrosine per serving | Our score | Price a bottle | Buy |
|---|---|---|---|---|---|
 GlucoTonic#1 in blood sugar support | Liquid drops1 ml | Not printedIn a 200 mg proprietary blend | 9.9 | $49 | Check price |
 Sugar Defender#3 in blood sugar support | Liquid drops1 ml | Not printedIn a 200 mg proprietary blend | 9.5 | $49 | Check price |
 Glyco Harmony#5 in blood sugar support | Liquid drops1 ml | Not printedIn a 200 mg proprietary blend | 9.3 | $49 | Check price |
Questions people ask
What is L-tyrosine?
L-tyrosine is a form of the amino acid tyrosine, according to the NIH. EFSA (the European Food Safety Authority) says L-tyrosine is the starting material for making catecholamines, including dopamine.
Where does L-tyrosine come from in food?
L-tyrosine occurs naturally in foods, mainly as part of proteins. EFSA (the European Food Safety Authority) says dietary L-tyrosine comes from protein eaten from different sources.
Which supplements we reviewed contain L-tyrosine?
GlucoTonic, Sugar Defender and Glyco Harmony all list L-tyrosine. All three are liquid drops with a 1 ml serving.
Which supplements we reviewed contain l-tyrosine?
None of the three supplements prints a separate L-tyrosine amount. Each lists it inside a 200 mg proprietary blend per 1 ml serving. The 200 mg is the whole blend's amount, not the amount of L-tyrosine.
Also in these products
Sources
The products, amounts and prices come from each product's label and checkout, as its review shows them. AI drafts our pages from listed sources, figures are checked against them, and we have not tried the products.
- 1NIH National Cancer Institute Thesaurus, L-Tyrosineevsexplore.semantics.cancer.gov/evsexplorechecked
- 2EFSA Journal (2011), scientific opinion 2290efsa.onlinelibrary.wiley.com/doichecked