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L-Cysteine Powder

Source NaturalsUpdated April 2026

Product Information

Form
Powder
Servings Per Container
83
UPC
0 21078 00120 1
Product Type
Amino acid/Protein
DSLD Entry Date
2022-11-22

Target Groups

Adult (18 - 50 Years)Gluten FreeDairy FreeSugar Free

All Ingredients

IngredientAmount% DV
L-Cysteine900 mg

† Daily Value not established.

Label Statements

FDA Statement of Identity

Dietary Supplement

Formula re: Contains

L-Cysteine is a crystalline free-form amino acid that is active in many body processes. L-Cysteine works in the liver to protect the body from harmful substances and may help to prevent oxidation of tissues. L-Cysteine, along with L-glutamic acid and glycine, is the rate-limiting precursor in the synthesis of glutathione per-oxidase (one of the body's main antioxidant enzymes), which minimizes lipid peroxidation (fats turning rancid).

Suggested/Recommended/Usage/Directions

Suggested Use: 1/4 teaspoon per day between meals. If you experience stomach irritation, take with meals.

Precautions re: Pregnant or Nursing or Prescription Medications

Note: If you are pregnant, may become pregnant, or are breastfeeding, consult your health care professional before using this product.

Storage

Store in a cool, dry place.

Precautions re: All Other

Do not use if either tamper-evident seal is broken or missing.

Precautions re: Children

Keep out of the reach of children.

Formulation re: 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.

FDA Disclaimer Statement

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.

Brand IP Statement(s) re: (c), (TM), (SM)

Copyright SOURCE NATURALS, INC.

Formulation re: Other

Free-form

Supplement Facts Panel

Supplement Facts
Serving Size 1.2 Gram(s)
Servings Per Container 83
Amount Per Serving% Daily Value*
L-Cysteine
900 mg

* Percent Daily Values are based on a 2,000 calorie diet.

† Daily Value not established.

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