L-Cysteine, 500 mg, 100 Tablets (Now Foods)

This description has been derived from the manufacturer’s / distributor’s website.

L-Cysteine is a non-essential sulfur amino acid, which plays a critical role in methionine, taurine and glutathione metabolism. It is also an important component of hair, nails and the keratin of the skin. L-Cysteine stabilizes protein structure and aids in the formation of collagen, being thereby indispensable to skin, hair and nail health.

Soy Free
non-GMO
Nut Free
Made w/o Gluten
Dairy Free
Egg Free
Halal
Kosher

L-Cysteine, 500 mg, 100 Tablets (Now Foods) – Ingredients

L-Cysteine (Cysteine)
- L-Cysteine Hydrochloride (C₃H₇NO₂S or C₃H₈ClNO₂S)
  L-Cysteine Hydrochloride: L-Cysteine Hydrochloride, Cystein Chloride, Cysteine Monohydrochloride, Cysteine Hydrochloride, L-Cysteine Monohydrochloride, Cysteine HCl, Cysteine HCl (Anhydrous), Cysteine Hydrochloride (Anhydrous), PubChem CID: 60960, Chemical Abstracts Service: CAS: 52-89-1, ChemIDplus: 52-89-1, FDA Substance Registration System – Unique Ingredient Identifier: UNII: A9U1687S1S, The Best Supplements – Unique Ingredient Identifier: TBSI ID: IS29F630-1.
- L-Cysteine (Cysteine) (C₃H₇NO₂S)
  L-Cysteine (Cysteine): L-Cysteine, Cysteine, Cystein, Thioserine,
  PubChem CID: 5862,
  Chemical Abstracts Service: CAS: 52-90-4,
  ChemIDplus: 52-90-4,
  The Best Supplements – Unique Ingredient Identifier: TBSI ID: IS29F630.
Vitamin B6 (Pyridoxine)
- Vitamin B6 (Pyridoxine) (C₈H₁₁NO₃)
  Vitamin B6 (Pyridoxine): Pyridoxine, Gravidox, Pyridoxol, Vitamin B6,
  PubChem CID: 1054,
  Chemical Abstracts Service: CAS: 65-23-6,
  ChemIDplus: 65-23-6,
  WHO Anatomical Therapeutic Chemical Classification System: ATC code: A11HA02,
  FDA Substance Registration System – Unique Ingredient Identifier: UNII: KV2JZ1BI6Z,
  The Best Supplements – Unique Ingredient Identifier: TBSI ID: IS264CB0,
  References:
  Amino Acids: ROSSIGNOLI, Giada; et al. Phosphorylation of Pyridoxal 5′-phosphate Enzymes: An Intriguing and Neglected Topic. Amino acids, 2018, 50.2: 205-215. PMID:29204749, PHILLIPS, Robert S. Chemistry and Diversity of pyridoxal-5′-phosphate Dependent Enzymes. Biochimica et Biophysica Acta (BBA)-Proteins and Proteomics, 2015, 1854.9: 1167-1174. PMID:25615531.
- Vitamin B6 (Pyridoxine Hydrochloride) (C₈H₁₂ClNO₃)
  Vitamin B6 (Pyridoxine Hydrochloride): Pyridoxine Hydrochloride, Pyridoxine HCl, Pyridoxol Hydrochloride, Alestrol, Becilan, Benadon, Hexavibex, Hexermin, Aderoxin, PubChem CID: 6019, Chemical Abstracts Service: CAS: 58-56-0, ChemIDplus: 58-56-0, WHO Anatomical Therapeutic Chemical Classification System: ATC code: A11HA02, FDA Substance Registration System – Unique Ingredient Identifier: UNII: 68Y4CF58BV, The Best Supplements – Unique Ingredient Identifier: TBSI ID: IS264CB0-1, References: Amino Acids: HUANG, Yan; SU, Lingqia; WU, Jing Pyridoxine Supplementation Improves the Activity of Recombinant Glutamate Decarboxylase and the Enzymatic Production of Gama-Aminobutyric Acid. PloS one, 2016, 11.7: e0157466. PMID:27438707, DIAZ-ARRASTIA, Ramon; et al. Homocysteine and Neurologic Disease. Archives of neurology, 2000, 57.10: 1422-1427. PMID:11030793.
Vitamin C (Ascorbic Acid) (C₆H₈O₆)
Vitamin C (Ascorbic Acid): Ascorbic Acid, L-Ascorbic Acid, L(+)-Ascorbic Acid, Vitamin C,
PubChem CID: 54670067,
Chemical Abstracts Service: CAS: 50-81-7,
ChemIDplus: 50-81-7,
WHO Anatomical Therapeutic Chemical Classification System: ATC code: A11GA01,
FDA Substance Registration System – Unique Ingredient Identifier: UNII: PQ6CK8PD0R,
The Best Supplements – Unique Ingredient Identifier: TBSI ID: IS2D5190,
References:
Amino Acids: KARIM, Md Razaul; KADOWAKI, Motoni Effect and Proposed Mechanism of Vitamin C Modulating Amino Acid Regulation of Autophagic Proteolysis. Biochimie, 2017, 142: 51-62. PMID:28804003, GOULD, Rebecca L.; PAZDRO, Robert Impact of Supplementary Amino Acids, Micronutrients, and Overall Diet on Glutathione Homeostasis. Nutrients, 2019, 11.5: 1056. PMID:31083508.

Supplement Facts
Name:	L-Cysteine, 500 mg, 100 Tablets
Serving Size:	1 Tablet
	Amount Per Serving	% Daily Value
Vitamin C (Ascorbic Acid)	60 mg	100%
Vitamin B-6 (Pyridoxine Hcl)	10 mg	500%
L-Cysteine (L-Cysteine Hydrochloride)	500 mg	†
† Daily Value not established.

Package Quantity
Manufacturer:	Now Foods
Manufacturer Code:	00077
UPC Code (gtin12):	733739000774
Count	100

Other ingredients

Other Ingredients: Microcrystalline Cellulose, Vegetarian Coating, Silicon Dioxide, Magnesium Stearate (vegetable source) and Citric Acid.

L-Cysteine, 500 mg, 100 Tablets – Suggested Use

Take 1 tablet 1 to 3 times daily as needed.

Recommended Intake
Dose Unit	Dose Value	Frequency	Target Population
tablet	1	1 to 3 times daily	adults

Warnings

Natural color variation may occur in this product.
Store in a cool, dry place after opening.
For adults only. Consult physician if pregnant/nursing, taking medication. Keep out of reach of children.
Do not eat freshness packet. Keep in bottle.

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The L-Cysteine, 500 mg, 100 Tablets (Now Foods) dietary supplement is available in Holy See (Vatican City State) and many others countries around the world. In Holy See (Vatican City State) this supplement contains: L-Cysteine, Vitamin B6 and Vitamin C in its composition.

Detailed descriptions of the ingredients included in the L-Cysteine, 500 mg, 100 Tablets (Now Foods) dietary supplement:

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