---
title: "Glycine — Evidence & Citations | Magellan"
description: "Natural sources, dosing and cited research for Glycine."
url: "https://magellanlongevity.com/m/glycine.md"
canonical: "https://magellanlongevity.com/m/glycine.html"
html: "https://magellanlongevity.com/m/glycine.html"
type: "molecule"
slug: "glycine"
citations: 0
updated: 2026-08-11
author: "Gabriel Radu, DO"
author_credentials: "Physiatrist (PM&R). NY medical license 275110. NPI 1376861765."
publisher: "Magellan Longevity"
content_format: "markdown"
---

# Glycine

[Home](https://magellanlongevity.com/) › Molecules › Glycine

**HTML version:** https://magellanlongevity.com/m/glycine.html · **In the Magellan app:** https://magellanlongevity.com/#/search/Glycine

## Where it comes from without a bottle

Food, exercise and behaviour routes to the same pathway, each with its citation.

| Natural source | How it works | Citation |
| --- | --- | --- |
| Gelatin / bone broth & meat | Glycine isn't always made in sufficient amounts; dietary glycine supports sleep and metabolic health. | Oxid Med Cell Longev 2017 [PMID 28337245](https://pubmed.ncbi.nlm.nih.gov/28337245/) |
| Protein foods (meat, fish, grains) | Dietary glycine can be rate-limiting for glutathione synthesis; whole foods supply it. | Am J Clin Nutr 2013 [PMID 23656904](https://pubmed.ncbi.nlm.nih.gov/23656904/) |

### What those papers actually say

1. **Gelatin / bone broth & meat**
   Oxid Med Cell Longev 2017 · [PMID 28337245](https://pubmed.ncbi.nlm.nih.gov/28337245/) · [DOI 10.1155/2017/1716701](https://doi.org/10.1155/2017/1716701)

   > Glycine also has the property to enhance the quality of sleep and neurological functions... glycine is not sufficiently synthesized in humans.

2. **Protein foods (meat, fish, grains)**
   Am J Clin Nutr 2013 · [PMID 23656904](https://pubmed.ncbi.nlm.nih.gov/23656904/) · [DOI 10.3945/ajcn.112.043000](https://doi.org/10.3945/ajcn.112.043000)

   > In Westerners, meat was the main dietary source of glycine... (Chinese: grains/flour and rice; Japanese: fish/shellfish and rice).

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## Related on Magellan Longevity

- [Evidence-based longevity supplements](https://magellanlongevity.com/longevity-supplements.md)
- [Longevity research map](https://magellanlongevity.com/longevity-research-map.html)
- [Pathway universe](https://magellanlongevity.com/pathway-universe.html)

## Scope and disclosures

Educational information, not medical advice. Nothing here is intended to diagnose, treat, cure, or prevent any disease. Talk to your physician before starting any supplement or device, especially if you are pregnant, nursing, or taking medication.

Editorial firewall: evidence grades are assigned from the published research and are independent of any affiliate commission. As an Amazon Associate, Magellan Longevity earns from qualifying purchases.

Reviewed for accuracy by a board-certified physician (DO).