Can Eggshell Powder Support Bone Health? Benefits, Preparation, Safety, and What Science Says
A Simple Kitchen Ingredient That Has Gained Attention
Most people throw away eggshells without a second thought. However, in recent years, eggshell powder has attracted interest as a natural source of calcium and other minerals that may contribute to bone health.
Because eggshells contain a high concentration of calcium, some people use finely ground eggshell powder as a homemade dietary supplement. But is it safe? Does it really help support healthy bones?
In this guide, you’ll learn what eggshells contain, how they are traditionally prepared, potential benefits, important safety considerations, and what current research suggests.
What Are Eggshells Made Of?
Eggshells are composed primarily of calcium carbonate, the same form of calcium found in many commercial calcium supplements.
A typical eggshell contains approximately:
90–95% calcium carbonate
Small amounts of magnesium
Trace amounts of phosphorus
Naturally occurring proteins in the eggshell membrane
Because calcium is essential for bone maintenance, eggshell powder has become a topic of interest among those seeking natural calcium sources.
Why Calcium Is Important
Bone Health
Most of the body’s calcium is stored in bones and teeth.
Muscle Function
Calcium contributes to normal muscle contraction.
Nerve Communication
Nerves rely on calcium for proper signaling.
Dental Health
Calcium helps maintain strong teeth and supports overall oral health.
Potential Benefits of Eggshell Powder
1. Supports Bone Maintenance
Adequate calcium intake is important throughout life, especially as people age.
Bone density naturally declines over time, making calcium-rich foods an important part of a balanced diet.
2. May Help Meet Daily Calcium Needs
For individuals who do not consume enough calcium-rich foods, eggshell powder may contribute additional calcium to the diet.
However, it should not replace professional nutritional guidance.
3. Supports Dental Health
Calcium is a key mineral involved in maintaining healthy teeth and enamel.
Meeting recommended calcium intake may support overall oral wellness.
4. An Affordable Natural Calcium Source
Compared with some commercial supplements, eggshells are widely available and inexpensive.
This is one reason they continue to attract interest in traditional nutrition practices.
What Research Says About Eggshell Calcium
Some studies have examined eggshell-derived calcium as a dietary supplement.
Researchers have noted that eggshell calcium contains a highly concentrated form of calcium carbonate and may be absorbed similarly to some commercial calcium products.
However, research remains limited, and more studies are needed to determine long-term effectiveness and safety.
How to Prepare Eggshell Powder Safely
Proper preparation is essential to reduce the risk of contamination.
Step 1: Wash Thoroughly
Rinse eggshells under running water to remove residue.
Step 2: Boil
Boil the shells for approximately 10 minutes to help reduce bacterial contamination.
Step 3: Dry Completely
Allow the shells to dry fully.
Step 4: Heat Treatment
Place the shells in an oven for 10–15 minutes at a moderate temperature.
Step 5: Grind into a Fine Powder
Use a blender, grinder, or food processor to create a very fine powder.
Step 6: Store Properly
Keep the powder in a sealed glass container in a cool, dry place.
