Skip to product information
1 of 3

NOW Supplements (Pure Source)


Regular price $19.98
Regular price $24.97 Sale price $19.98
Sale Sold out
Shipping calculated at checkout.

L-Cysteine is a sulfur-containing amino acid that plays a large role in making the structure of collagen. It also helps generate glutathione, the master antioxidant that helps support detoxification and immune system function. L-Cysteine will help make proteins such as Metallothionein, which have the role of binding to heavy metals such as mercury, lead and cadmium. NOW® L-Cysteine has added Vitamin C to help with collagen formation, and Vitamin B6 to aid glutathione production. 


  • 500mg, 100 tablets

Key Features:

  • With vitamin B-6 and C
  • Promotes detoxification
  • Precursor for glutathione - the primary cellular antioxidant, to maintain good health
  • Kosher, non-GMO formula


Each tablet contains:

L-Cysteine (from L-Cysteine Hydrochloride) 500 mg
Vitamin C (as Ascorbic Acid) 60 mg
Vitamin B-6 (from Pyridoxine Hydrochloride) 10 mg

Non-Medicinal Ingredients: Cellulose, Tablet Coating (water, hypromellose, stearic acid (vegetable source), cellulose), Silica, Magnesium Stearate (vegetable source), Citric Acid.

How to use:

Adult Dosage: Take 1 tablet 1-3 times daily with water.

Consult a health care practitioner prior to use if you are taking nitroglycerin, acetaminophen, iron supplements or if you have gout. Do not use if you are pregnant, breastfeeding, or have a history of kidney stones.