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 Ecuador and many others countries around the world. In Ecuador 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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