PlainVitamins

N-Acetyl L-Tyrosine 300 mg

by Source Naturals · tablet or pill · 30 tablets

  • On the market (NIH)
  • UPC 0 21078 00930 6
  • DSLD label 296098
  • Serving 1 tablet
  • 30 servings

N-Acetyl L-Tyrosine 300 mg by Source Naturals lists 3 ingredients, 3 with an amount per serving of 1 tablet, such as 25 mg of vitamin B6, 400 mcg of folate and 300 mg of N-acetyl L-tyrosine. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2023.

What is in N-Acetyl L-Tyrosine 300 mg?

Each row as the label prints it, per serving of 1 tablet. 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).

N-Acetyl L-Tyrosine 300 mg: Supplement Facts rows against the market (DSLD label 296098, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin B6as Pyridoxine Hydrochloride25 mg1,250%Vitamin B6 in N-Acetyl L-Tyrosine 300 mg against 15,277 products25 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg25 mg

Higher than 76% of 15,277 products listing vitamin B6 (median 6 mg).

Folateas Folic Acid400 mcg100%Folate in N-Acetyl L-Tyrosine 300 mg against 7,022 products400 mcg per serving; the middle half of products list 200 mcg to 400 mcg, the median 400 mcg.400 mcg

24% of 7,022 products listing folate give more (median 400 mcg).

N-Acetyl L-Tyrosine300 mgN-Acetyl Tyrosine in N-Acetyl L-Tyrosine 300 mg against 344 products300 mg per serving; the middle half of products list 100 mg to 500 mg, the median 250 mg.300 mg

Higher than 51% of 344 products listing N-acetyl tyrosine (median 250 mg).

Source: NIH ODS Dietary Supplement Label Database, label 296098 (entered August 23, 2023), 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?

The products whose ingredient lists overlap most with N-Acetyl L-Tyrosine 300 mg's, rare ingredients counting for more.

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 tablet daily.
Warnings
Warning: Contains tyrosine. 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.
Allergens and what it does not contain
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.

Source: label statements in DSLD label 296098.

What else is on the label?

Other ingredients: Sorbitol, Stearic Acid, Magnesium Stearate, modified Cellulose Gum, Colloidal Silicon Dioxide.

How many labels does N-Acetyl L-Tyrosine 300 mg have?

2 labels are on file under this name since October 24, 2022: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 296098 (current) Entered August 23, 2023 · on the market · 30 tablets · UPC 0 21078 00930 6
  2. Label 275425 Entered October 24, 2022 · on the market · 120 tablets · UPC 0 21078 00217 8

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.

Where next?