L-Tyrosine Powder
by Source Naturals · powder · 3.53 ounces
- On the market (NIH)
- UPC 0 21078 00187 4
- DSLD label 274814
- Serving 0.67 g (1/4 teaspoon)
- 149 servings
L-Tyrosine Powder by Source Naturals lists one ingredient: 660 mg of L-tyrosine per serving of 0.67 g. Its current label entered the NIH Dietary Supplement Label Database on November 22, 2022.
What is in L-Tyrosine Powder?
Each row as the label prints it, per serving of 0.67 g. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| L-Tyrosine | 660 mg | Higher than 68% of 1,680 products listing tyrosine (median 500 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 274814 (entered November 22, 2022), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.
Is that a lot?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.
The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.
The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.
Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.
Which products have the closest formulas?
6 products list the very same ingredients; the nearest amounts come first.
- L-Tyrosine 750 mgNOW · off the market same ingredients
- L-Tyrosine 750 mg - Extra StrengthNOW same ingredients
- L-TyrosineDouglas Laboratories same ingredients
- L-Tyrosine 500 mgVitaCeutical Labs same ingredients
- L Tyrosine 500 mgBronson Laboratories · off the market same ingredients
- L-Tyrosine 500 mgGood 'N Natural · off the market same ingredients
Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.
What does the label say about taking it?
Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.
- Directions
- Suggested Use: 1/4 teaspoon daily, mixed with water or juice between meals.
- Warnings
- Not to be used with MAO inhibitor drugs. If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.
- Do not use if either tamper-evident seal is broken or missing.
- Keep out of the reach of children.
- Warning: Contains tyrosine.
- Allergens and what it does not contain
- Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.
Source: label statements in DSLD label 274814.
How many labels does L-Tyrosine Powder have?
One label is on file, entered on November 22, 2022.
- Label 274814 (current) Entered November 22, 2022 · on the market · 3.53 ounces · UPC 0 21078 00187 4
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Source Naturals, Inc. (distributor), Santa Cruz, CA. All Source Naturals products.