🦴 “When the Knee Loses Collagen, Eggshells Are a Lifesaver” — Fact-Checked
This headline overstates the evidence. Eggshells are not a proven way to “rebuild” lost knee cartilage or cure arthritis.
There is some interesting research on eggshell membrane, the thin layer attached to the inside of the shell. Small clinical trials have found that standardized eggshell-membrane supplements may modestly improve knee pain, stiffness, or function in some people with osteoarthritis. For example, one randomized trial used 300 mg/day of eggshell membrane for 12 weeks—not a homemade tablespoon of crushed shell. (PubMed)
🥚 What about eating crushed eggshell?
That’s different from taking a standardized eggshell-membrane supplement. Eggshell itself is largely calcium carbonate, but there isn’t good clinical evidence that eating homemade eggshell powder rebuilds knee cartilage.
There is also a food-safety concern: raw eggs and their shells can carry Salmonella. The FDA recommends proper refrigeration and thorough cooking of eggs to reduce this risk. (U.S. Food and Drug Administration)
🦵 What actually helps knee osteoarthritis?
Evidence-based approaches include:
- Regular strengthening and low-impact exercise
- Maintaining a healthy weight when appropriate
- Physical therapy or targeted exercises
- Appropriate pain-relief treatments recommended by a healthcare professional
- In selected cases, injections or surgery
Collagen-derived supplements have shown some modest improvements in pain and function in clinical trials, but they don’t mean damaged cartilage has been completely regenerated. (PubMed)
Bottom line: 🥚 Eggshell membrane is an interesting area of research, but “eggshells are a lifesaver for knees” is far too strong. I wouldn’t recommend swallowing homemade crushed eggshells as a knee treatment, especially without discussing it with a healthcare professional.
