Social media often claims that eggshell powder is the secret to rebuilding knee collagen and eliminating joint pain.While eggshells are rich in calcium, they are not a miracle cure for arthritis or cartilage loss. However, properly prepared eggshell powder may provide calcium, and some eggshell membrane supplements have shown limited promise for supporting joint comfort.
Here’s what you should know before trying this home remedy.
Why Eggshells?
An eggshell is made primarily of calcium carbonate, the same form of calcium found in many supplements.
Eggshells also contain tiny amounts of:
- Magnesium
- Phosphorus
- Collagen-rich membrane (the thin lining inside the shell)
- Trace minerals
The membrane—not the shell itself—contains natural collagen and proteins that have been studied for joint health.