Joel Brind: Glycine, Methionine, and Modern Inflammation
What if a single amino acid in your diet is shaping how often your body inflames?
What this episode covers
- Most modern diets may be low in glycine, an amino acid found in skin, bones, and connective tissue.
- Low intake may keep low-grade inflammation higher than needed.
- Adding bone broth, collagen, or glycine-rich foods may shift the balance for some people.
- The dosing claims and broader role need more research before becoming standard advice.
Why it matters
If glycine helps keep inflammation in check, then how meat is cooked and which parts are eaten may shape low-grade inflammation more than meat-versus-no-meat alone.
What stands out
- Glycine is technically classified as non-essential, but modern diets may not provide enough for some people because of how meat is eaten today (biochemistry research plus dietary surveys)
- Magnesium glycinate, a common magnesium supplement, may deliver about 2 grams of glycine per 300 mg dose, which is roughly a fifth of what is being suggested as a useful daily amount (supplement composition data)
- Muscle meat is high in methionine, which the body uses glycine to clear, so eating more steak without bone broth may actually use up more glycine than it provides (basic amino acid biochemistry)
One key action from this episode
Consider adding a daily cup of bone broth or 10-15 grams of collagen powder to your routine for 8 weeks before deciding whether glycine supplementation is worth pursuing further.
What to do
Actions discussed in this episode. This is what one expert recommends — the full topic compares and ranks across experts.
- Drink one cup of homemade bone broth daily for 4 weeks, ideally made from bones with connective tissue.
- Add 10-15 grams of collagen or gelatin powder to one drink daily for 8 weeks and note any changes in joint stiffness or sleep.
- Replace one muscle-meat dinner per week with a slow-cooked dish that includes skin, tendons, or bones (oxtail, chicken with skin, fish with skin).
Full context, impact ratings, and timing — available in related topics
Questions to take to your doctor
- Could you check whether my current diet may be low in collagen-rich protein?
- Is it safe for me to add a daily collagen or glycine supplement given my current medications and kidney function?
- Are there inflammation markers like CRP that would help track whether dietary changes are making a measurable difference?
Full doctor prep with ranked questions available in the full topic page
Context
Endocrinologist who has spent decades on amino acid metabolism, particularly glycine biology and methionine balance. Approaches health questions through mechanism plus small-RCT validation, not population-level epidemiology. Useful for understanding why a specific nutrient might matter mechanistically; less useful for deciding whether you specifically need it.
This is not settled science yet. The role of glycine as a primary inflammation regulator is supported by some research but is broader than current consensus, and the speaker has a commercial interest in glycine supplements. This does not mean you should change or stop your current treatment on your own.
Where people go wrong
- Taking high-dose glycine supplements without checking medication interactions or kidney function.Glycine can interact with some medications and may not be appropriate for people with certain kidney conditions; a doctor's review is sensible before going above food-level doses.
- Treating glycine as the single answer to chronic inflammation, ignoring sleep, food quality, and stress.Inflammation has many drivers, and focusing on one nutrient may delay broader changes that would matter more for most people.
What to expect over time
- First 1-2 weeksSome people notice better sleep or smoother digestion after adding bone broth or collagen, but effects vary widely.
- 1-3 monthsJoint stiffness, exercise recovery, or low-grade inflammation markers may shift somewhat for some people. Effects depend heavily on the rest of the diet.
- 6-12 monthsSustained dietary changes around collagen-rich foods may show in long-term inflammation markers. Single-nutrient effects at this scale are hard to isolate.