Manufacturers List

L-Proline

L-Proline is a food-grade non-essential amino acid with a unique cyclic structure, used in food flavoring, collagen synthesis support, and pharmaceutical applications. We supply bulk L-Proline sourced from leading China manufacturers, available in powder form for international food processing operations. Our L-Proline is widely used in skin health dietary supplements, food and seasoning manufacturing, connective tissue support products, infusion solutions and skin hydration.

Kosher Halal ISO 9001 BRC
CAS No.
541-15-1
HS Code
292390

L-Proline is a non-essential amino acid with a distinctive cyclic pyrrolidine side chain that gives it unique structural properties among the standard amino acids. It is the most abundant amino acid in collagen, the primary structural protein in connective tissues, skin, and bones.

In the food industry, L-Proline contributes to flavor development in fermented and heated foods through Maillard reactions. It is produced commercially through microbial fermentation using optimized bacterial strains. L-Proline's role in collagen biosynthesis and its hydroxylated derivative hydroxyproline make it a key ingredient in skin health, joint health, and wound-healing formulations.

  • Collagen and skin health dietary supplements
  • Flavor development in food and seasoning manufacturing
  • Joint health and connective tissue support products
  • Pharmaceutical preparations and infusion solutions
  • Cosmetic formulations for skin hydration

Grades / Types Available: CP2020, EP11, USP2023

Item Specification
Appearance White crystalline powder
Assay ≥98.5%
Specific Rotation [α]D20 -84.0° to -86.0°
Loss on Drying ≤0.5%
Residue on Ignition ≤0.1%
pH (5% solution) 5.5–7.0
Heavy Metals (as Pb) ≤10 ppm
Arsenic ≤1 ppm
Chloride ≤0.02%
Total Plate Count ≤1000 CFU/g
Transmittance (T430) (CP2020) ≥98.0%
Appearance of solution (EP11) clear & colorless
Ammonium (CP2020) ≤0.02%
Sulfate (CP2020) ≤0.02%
Iron (CP2020) ≤10PPM
Other amino acids (CP2020) ≤0.5%
Ninhydrin-positive substances (EP11) Each impurity≤0.2% Total impurities≤0.5%
Endotoxin (CP2020) <10EU/g
Moulds & Yeasts (CP2020) ≤ 50 CFU/g
L-Proline packaging

MOQ

Our MOQ for bulk food/feed ingredient is generally 500 kg. We also support mixed containers — combine L-Proline with other food ingredients in one shipment to save on freight.

Samples

We provide free samples (100–500g) for quality testing before you place a bulk order. The buyer covers shipping costs only. Samples are typically dispatched within 2–3 business days.

Lead Time

Standard lead time is 7–15 days after order confirmation and payment. For stock items, delivery can be faster. We will confirm the exact timeline before you place the order.

Documents

You will receive the original COA (Certificate of Analysis), COO (Certificate of Origin), MSDS, TDS, and relevant certifications directly from the manufacturer. We guarantee full document authenticity and traceability.

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