Why Choose Eggshell Calcium?
For many, commercial calcium supplements can be expensive or contain additives and fillers they wish to avoid. Eggshells offer a natural, cost-effective, and highly bioavailable alternative, with a composition nearly identical to the calcium carbonate found in our own bones and teeth. Furthermore, using eggshells repurposes kitchen waste, providing an eco-friendly and zero-waste solution. Research suggests that eggshell calcium can be absorbed more effectively by the body than some commercial supplements.
Benefits of Eggshell Calcium
- High Bioavailability: Studies on both animal and human subjects suggest that the calcium in eggshells is easily absorbed and utilized by the body.
- Bone Health: The calcium content helps support bone mineral density, which can be beneficial in preventing or managing osteoporosis, particularly in postmenopausal women.
- Joint Support: The eggshell membrane, rich in proteins like collagen, glucosamine, and chondroitin, can offer additional support for joint health and cartilage growth.
- Rich in Trace Minerals: Besides calcium, eggshells contain other trace minerals such as strontium, magnesium, and selenium, which also contribute to bone health.
The Step-by-Step Guide to Making Eggshell Calcium Powder
Creating your own eggshell calcium powder requires careful attention to sanitation and processing to ensure safety and effectiveness. It's a straightforward process, but rushing or skipping steps is not advised.
Step 1: Collect and Clean Your Eggshells
Save your leftover eggshells, ideally from organic or pasture-raised eggs if possible. Rinse them thoroughly under warm running water to remove all traces of egg white. The inner membrane should be left intact, as it is a source of beneficial nutrients. Store the rinsed shells in a container in the refrigerator until you have enough for a batch, about 10-12 shells.
Step 2: Sterilize the Shells
Sterilization is the most critical step for killing potentially harmful bacteria like Salmonella.
- Place the clean eggshells in a pot and cover them with water.
- Bring the water to a rolling boil and continue boiling the shells for 10-15 minutes.
- Drain the shells and allow them to cool completely.
Step 3: Dry the Shells
Thoroughly drying the shells is crucial for proper grinding. The baking process also serves as a secondary sterilization step.
- Spread the boiled shells on a baking sheet in a single, even layer.
- Bake in an oven at a low temperature, around 225°F (105°C), for 20-30 minutes. The shells should be completely dry and brittle. This will also make them much easier to grind.
Step 4: Grind the Shells into a Fine Powder
The shells must be ground into an extremely fine powder to prevent injury from sharp fragments. A coffee or spice grinder is recommended for achieving the finest consistency.
- Place the dried, cooled shells into your grinder.
- Blend until the shells are completely broken down into a fine powder. This may take several rounds.
- For best results, use a fine mesh sieve or strainer to sift the powder, removing any larger pieces. Re-grind any larger fragments.
Step 5: Store Your Homemade Supplement
- Transfer the cooled, finely-ground eggshell powder into an airtight container.
- Store the container in a cool, dry place away from direct sunlight.
- Properly stored powder can last for up to two months.
Comparison of Eggshell Calcium vs. Commercial Supplements
| Feature | Homemade Eggshell Calcium Powder | Commercial Calcium Supplements |
|---|---|---|
| Source | 100% natural, repurposed eggshells. | Can be synthetic or sourced from limestone, coral, or oyster shells. |
| Cost | Very low, as it uses kitchen scraps. | Varies, but typically more expensive. |
| Bioavailability | High, comparable to purified calcium carbonate, potentially higher due to organic compounds. | Varies greatly depending on the form (e.g., carbonate, citrate). |
| Purity | Contains trace minerals naturally present in the eggshell. | May contain fillers, additives, or potentially higher levels of toxic metals. |
| Safety | Requires careful sanitation to prevent bacterial contamination like Salmonella. | Regulated, but quality can differ between brands. |
| Dosage Control | Requires a measuring spoon and potentially a kitchen scale for precision. | Clear dosage instructions on the label. |
How to Use Your Eggshell Calcium Powder
Incorporating homemade calcium powder into your diet can be done by mixing a small amount into various foods and drinks. It's often recommended to take it with meals to enhance absorption.
Common uses include:
- Smoothies: The powder is virtually flavorless and mixes seamlessly into smoothies for a morning nutritional boost.
- Juice or water: Simply mix a small amount into a glass of juice or water. The finer the grind, the better it will mix.
- Baked Goods: Add the powder to bread, muffins, or cakes to enhance their mineral content.
- Soups and Sauces: Stir a small amount into cooked soups, stews, or spaghetti sauce.
Important Precautions
While eggshell calcium can be a safe and beneficial supplement, a few key precautions must be followed. Always consult with a healthcare professional before starting any new supplement regimen, especially if you have pre-existing health conditions, are pregnant, or are taking other medications. Following the sterilization and grinding instructions carefully is crucial to minimize health risks. Always use a fine grinder to ensure no sharp fragments remain, which could injure your digestive tract.
Conclusion
Making calcium supplements from egg shells at home is a simple and rewarding process that offers a natural, cost-effective, and highly bioavailable source of calcium. By prioritizing safety through proper sterilization and meticulous grinding, you can create a high-quality powder to support bone health and reduce household waste. Remember to consult a doctor before use and to moderate your intake to ensure it complements your existing diet safely.
For more detailed scientific information on the bioavailability and benefits of eggshell calcium, consider reading this research review: Eggshell calcium: A cheap alternative to expensive supplements.
