L-Cysteine Powder – 98.5%

L-Cysteine is a semi-essential sulfur-containing amino acid and the rate-limiting precursor of glutathione. Fermentation-derived grades avoid traditional feather or hair sources and suit vegan claims.

GUTINS L-Cysteine — 98.5% is offered for manufacturers, formulators and brands. Specification: 98.5%; form / technology: Powder; diet suitability: Vegetarian where process permits.

Product Specifications

Key Benefits

• Supports glutathione synthesis
• Supports hair, skin and nail keratin
• Supports antioxidant defences
• Supports liver detoxification pathways
• Source of sulfur amino acid

Uses & Applications

Typical applications: Sports nutrition, cognition, recovery.

• Hair, skin and nail supplements
• Antioxidant and glutathione support capsules
• Liver support formulas
• Bakery dough conditioners
• Savoury flavour (reaction flavours)
• Cosmetic hair treatments

How to Use / Dosage

• Typical daily intake: 500-1,500 mg/day
• Typical use level: 5-40% in capsule and tablet fills; 0.001-0.01% as dough conditioner in bakery
• Weigh accurately and pre-blend small quantities with a carrier (e.g. maltodextrin, MCC or rice flour) for uniform distribution.
• Final dosage should be based on the lot-specific Certificate of Analysis, the target serving size and the rules of your destination market.

Solubility & Formulation

Freely soluble in water; oxidizes in solution to cystine; insoluble in oils

Storage & Handling

Store tightly closed under inert atmosphere if possible, cool and dry; protect from air and light.. Keep container tightly closed; use clean, dry utensils. Shelf life is typically 24 months in unopened original packaging (see CoA).

Regulatory Note

L-Cysteine is authorised as a food additive (E920, flour treatment) and nutrient; supplemental use is permitted in many markets. Verify source declaration (halal/vegan) and limits in the destination market.

Diet suitability: Vegetarian where process permits. This product is supplied as a raw ingredient for further manufacturing and is not a finished consumer product. The buyer is responsible for ensuring the ingredient, its use level and all label claims comply with the regulations of the destination market (e.g. FDA, EFSA, FSSAI, Health Canada, TGA).

Caution & Disclaimer

• Sulfurous odour; oxidizes readily - protect from air
• Caution with cystinuria
• High doses may cause GI upset
• Declare source (non-animal) where required - traditional sources include feathers/hair

For manufacturing, formulation and professional use only. Not for direct consumption in concentrated form. Keep out of reach of children. Avoid inhalation of dust and contact with eyes; use suitable PPE when handling. Consult a qualified healthcare professional before use if pregnant, nursing, taking medication or managing a medical condition. 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.

Bulk & Wholesale Orders

Need more than 5 Kg, a custom specification, private label support or documentation (CoA, TDS, SDS, allergen and GMO statements)? Contact the GUTINS team for bulk pricing and lead times.