Glycine is a non-essential amino acid that is naturally found in high-protein foods such as meat, fish, dairy, and legumes. It plays a crucial role in the body as a building block for proteins and is involved in several metabolic processes. Research indicates that glycine may support general health by contributing to better sleep, enhancing cognitive function, and promoting joint health. Some studies suggest it has anti-inflammatory and antioxidant properties, which may help protect tissues and

How many studies on Glycine are available?

NutriVouch references 563 human studies on Glycine, all peer-reviewed and indexed on PubMed.

Is Glycine effective for Better Sleep?

For Better Sleep, Glycine has an effectiveness score of 6/10 — moderate evidence — works in some populations. Based on 14 relevant studies.

Is Glycine effective for Collagen Support?

For Collagen Support, Glycine has an effectiveness score of 5/10 — moderate evidence — works in some populations. Based on 13 relevant studies.

Is Glycine effective for Stress Relief?

For Stress Relief, Glycine has an effectiveness score of 3/10 — weak or limited clinical evidence. Based on 22 relevant studies.

Is Glycine effective for Wound Healing?

For Wound Healing, Glycine has an effectiveness score of 3/10 — weak or limited clinical evidence. Based on 15 relevant studies.

Is Glycine effective for Gut Health?

For Gut Health, Glycine has an effectiveness score of 3/10 — weak or limited clinical evidence. Based on 13 relevant studies.

Confidence level

Strong evidence

563 studies

Glycine

Absorption

✦Can be taken with or without food. No significant absorption interactions known.

Daily Dose

⚖

Common dose: 3–5 grams daily.

RDA: No official RDA established.

Upper limit: Not established.

Best form: Glycine powder or capsules.

Timing: Can be taken with or without food.

Higher doses may be used in clinical settings for specific health concerns. Consult a healthcare provider for personalized advice.

Effects

Food Sources

Gelatin19g per 100g
Pork skin11.4g per 100g
Chicken skin3.3g per 100g
Turkey meat2g per 100g
Beef2g per 100g