A Brief Introduction to L-Hydroxyproline
Molecular Formula:C5H9NO3
Molecular Weight: 131.131
CAS No.:51-35-4
Appearance:White crystalline powder
Regular commercial package: 25kg/drum
What is L-Hydroxyproline?
L-Hydroxyproline is a non-essential amino acid that can be synthesized naturally by the body or obtained through food or supplements. Because L-Hydroxyproline is the most abundant amino acid in collagen, its levels in blood and urine are important indicators of collagen metabolism. It is also a diagnostic marker for bone metabolism and liver fibrosis.
Applications of L-Hydroxyproline
Highassay adheres to strict quality control (QC) to produce L-Hydroxyproline. Buy L-Hydroxyproline in bulk from us now to get competitive market prices.
- Cosmetics
It is added as a key ingredient to various cosmetics, such as anti-wrinkle creams and foundations. It has the effect of firming the skin and smoothing wrinkles. It can also be used to improve the smoothness and elasticity of hair.
- Food additive
It is sold as a nutritional supplement. As a major component of collagen, it is recommended for middle-aged and elderly people to take appropriate supplements to help prevent osteoporosis and maintain bone and joint health.
- Pharmaceutical field
It can be used as a pharmaceutical intermediate or as a wound healing accelerator. It helps patients undergoing treatment for burns, trauma, and other injuries to accelerate wound healing and reduce scar formation.
- Biological field
It is used in the production of biomaterials (such as biosensors) and in biological culture media.
Benefits of L-Hydroxyproline
- As a major component of collagen, an increase in L-Hydroxyproline helps repair damaged tissues such as skin, bone, and cartilage.
- L-Hydroxyproline plays a vital role in retaining skin moisture, smoothing wrinkles, and maintaining skin elasticity. Supplementing with L-Hydroxyproline can help us appear younger from the inside out.
- L-Hydroxyproline supplementation helps accelerate wound healing, as collagen plays a significant role in tissue repair.
If you have any questions about processing L-Hydroxyproline, Highassay’s R&D team is here to help.


Source of L-Hydroxyproline
L-Hydroxyproline can be obtained through daily diet or supplements, or it can be converted from L-Proline supplements. There are not many foods that can directly provide L-Hydroxyproline in the daily diet, especially for vegetarians. Plant-based foods such as beans, nuts, and seeds do not contain L-Hydroxyproline, only proline. To convert proline into L-Hydroxyproline, vitamin E is essential. Meat (especially skin and organ meats) and dairy products are rich in L-Hydroxyproline. To maintain amino acid balance in the body, it is recommended to take an appropriate amino acid supplement.
L-Hydroxyproline is synthesized by the L-Hydroxylation reaction of L-Proline with other amino acids, aided by vitamin C, during protein synthesis. Both L-Hydroxyproline and L-Proline play important roles in stabilizing proteins in the body and can promote tissue repair, enhance immunity, and provide energy, among other benefits.
Acetyl L-Hydroxyproline is a derivative of L-Hydroxyproline. When used to increase skin permeability, it has significant effects on topical skincare and is often used in the beauty industry.
Specification of L-Hydroxyproline
L-Hydroxyproline | AJI92 |
Assay | 99.0~101.0% |
PH | 5.0~6.5 |
Specific rotation[a]D20 | -74.0°~-77.0° |
Specific rotation[a]D25 | / |
Transmittance(T430) | ≥95% |
Chloride(Cl) | ≤0.02% |
Ammonium(NH4) | ≤0.02% |
Sulfate(SO4) | ≤0.02% |
Iron(Fe) | ≤10ppm |
Heavy metals(Pb) | ≤10ppm |
Arsenic | ≤1ppm |
Other amino acids | Chromatographically not detectable |
Ninhydrin-positive substances | / |
Loss on drying | ≤0.20% |
Residue on ignition | ≤0.10% |
Total plate count | ≤ 1000 CFU/g |
Moulds & Yeasts | ≤ 100 CFU/g |