That claim is mostly overhyped. Eggshells aren’t a practical or proven way to boost knee collagen.
🦴 What eggshells actually contain
- Mostly calcium carbonate (good for bone health, not collagen)
- The thin inner membrane has small amounts of collagen-related proteins
There is a supplement made from this layer—called Eggshell membrane—but that’s different from grinding up shells at home.
🧠 Do eggshells help your knees?
- Eating plain crushed shells → ❌ no real benefit for collagen
- Eggshell membrane supplements → ⚠️ some small studies show mild improvement in joint pain and stiffness, especially in Osteoarthritis
- Effects are modest, not dramatic
⚠️ Risks of DIY eggshell use
- Bacterial contamination (e.g., Salmonella infection)
- Sharp particles → can irritate mouth or digestive tract
- No standardized dose or safety
🦵 What actually supports joint collagen
- Adequate protein intake
- Vitamin C (helps collagen formation)
- Regular low-impact exercise
- Weight management
❌ What viral posts get wrong
- Suggest eggshells directly “build collagen” ❌
- Ignore safety issues ❌
- Exaggerate results ❌
✅ Bottom line
Eggshells are not a reliable or safe collagen solution. At best, specific processed supplements may offer mild support, but they’re not a cure.
If you want, I can suggest evidence-based options for knee pain and joint support that actually make a noticeable difference.
