The idea behind this claim is that eggshells contain minerals—especially calcium—and some people use powdered eggshells in homemade preparations for joint and bone support. However, there are important safety considerations.
Eggshells are mostly made of calcium carbonate, and they also contain small amounts of other minerals. Some studies have explored eggshell membrane (the thin layer inside the shell) for compounds that may support joint health, but evidence is still limited and eggshell powder is not a proven treatment for joint pain, arthritis, or muscle problems.
If someone uses eggshells:
- Do not eat raw eggshells—they can carry bacteria such as Salmonella.
- Homemade grinding methods may not remove contamination or create a safe, consistent dose.
- Too much calcium can be harmful for some people, especially those with certain kidney problems or who already take calcium supplements.
Safer ways to support bones and muscles include getting enough calcium and vitamin D, eating adequate protein, and doing regular strength or weight-bearing exercise.
So, while eggshells have nutritional components, the viral claim that they are a simple “joint and muscle remedy” goes beyond what current evidence can prove.
