What is hydroxyproline?

Hydroxyproline is a non-essential amino acid formed from proline and found in high amounts in collagen. It helps stabilize collagen structure in connective tissues.

What are the benefits of hydroxyproline?

As part of collagen peptides or collagen-rich foods, hydroxyproline supports connective tissue structure and may help skin elasticity and joint comfort. It is also involved in collagen formation during tissue repair.

How much hydroxyproline should I take?

Hydroxyproline is typically consumed through collagen supplements rather than as a standalone amino acid. A common supplemental range is about 500–2000 mg per day, depending on the product and goals.

What foods or supplements contain hydroxyproline?

Hydroxyproline is abundant in collagen-containing foods such as bone broth, gelatin, and collagen-rich cuts of meat. It is also present in collagen peptide and collagen hydrolysate supplements.

Is hydroxyproline safe?

For most people, hydroxyproline consumed via collagen foods or supplements is generally well tolerated. People with allergies to the source (for example fish or bovine collagen) or specific medical conditions should consult a clinician.

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Hydroxyproline

Moderate study situation·7/10

A higher score indicates better study conditions, but not necessarily effectiveness.

Hydroxyproline is a key amino acid unique to collagen, supporting skin, joint, and tissue health when consumed as part of collagen-rich supplements or foods.

Anti-inflammatory Joint Healt Tissue Repair Bone Health Skin Health

dose range

500–2000 mg

1–2 doses with meals

Consumption

Best taken with food, commonly as part of hydrolyzed collagen or collagen peptide supplements.

Not fat-soluble.

Best time

Splitting the dose across meals may increase absorption and digestive tolerance.

Description

Hydroxyproline is a collagen-specific, non-essential amino acid formed from proline, crucial for the stability and function of connective tissues. Widely present in collagen supplements, it plays an essential role in skin, bone, and joint health.

benefits

Main effects with level of evidence

Moderate

Note on evidence

Most benefits are supported by clinical studies using collagen supplements rich in hydroxyproline; direct supplementation studies are fewer, but mechanistic and human data are supportive.

Supports skin elasticity and hydration

Moderate

Supplementation with collagen peptides rich in hydroxyproline has been shown to improve skin elasticity, hydration, and reduce wrinkles in middle-aged women.

Particularly relevant for: Aging adults · Individuals seeking skin health support

S1 · PubMed: Oral supplementation and skin health (Hexsel et al., 2017)S5 · Examine.com – Collagen and Hydroxyproline

Contributes to joint comfort and cartilage integrity

Moderate

Hydroxyproline-rich collagen hydrolysate may reduce joint pain and support cartilage integrity, with evidence in conditions such as osteoarthritis.

Particularly relevant for: Athletes · Older adults · Those with joint pain

S2 · PubMed: Collagen hydrolysate in osteoarthritis (Clark et al., 2008)S5 · Examine.com – Collagen and Hydroxyproline S6 · EFSA Journal – Collagen and related health claims

Aids tissue repair and wound healing

Limited

Hydroxyproline is essential for new collagen formation during tissue repair, and increased levels correlate with faster wound healing.

Particularly relevant for: Individuals recovering from injury or surgery

S3 · PubMed: Dietary proline/hydroxyproline and wound healing (Liang et al., 2015)

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

Generally safe at typical supplemental dosages; however, individuals with allergies to animal-derived collagen or kidney disease should exercise caution.

warning notices

Rarely causes mild digestive discomfort at typical intake.
Not recommended for those with severe renal impairment unless under clinical supervision.
Source allergies (e.g., fish, bovine) possible with animal-derived collagen.
Avoid if you have a known allergy to animal-derived collagen sources.
Use only under medical supervision in cases of severe renal impairment or kidney disease.
Monitor kidney function with prolonged high intake, especially in those with preexisting renal conditions.

Known interactions with medications