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Why food-based calcium may be a smarter way to support healthy bones.
If you’ve been diagnosed with osteopenia or osteoporosis, you’ve probably been told to take calcium.
The next question is usually:
“Should I take a calcium supplement?”
My answer has always been the same—I recommend getting as much calcium as possible from food.
In this episode of Stronger Bones Lifestyle, I sat down with clinical pharmacist Jennifer Han, co-founder of Seen Nutrition, to discuss why the source of your calcium matters just as much as the amount.
Calcium Is Essential—but Food Comes First
There’s no question that calcium is critical for healthy bones.
In fact, about 99% of the calcium in your body is stored in your skeleton.
But calcium also supports muscle contraction, nerve function, and your heartbeat. If your body doesn’t get enough from your diet, it will draw from your bones to meet those needs.
That’s why adequate calcium intake matters.
The goal, however, isn’t simply taking more calcium—it’s helping your body absorb and use it effectively.
Why Many Calcium Supplements Fall Short
Jennifer explained that many traditional calcium supplements use synthetic forms such as calcium carbonate or calcium citrate.
These products can work differently in the digestive system and, for some people, may contribute to digestive discomfort such as bloating, gas, or constipation.
She also explained something I emphasize often:
Healthy digestion plays a major role in nutrient absorption.
As we age, stomach acid production naturally changes, and many women also take acid-suppressing medications that can affect how nutrients are absorbed.
Supporting digestion is just as important as choosing the right nutrients.
Food Brings More Than Calcium
One reason I encourage women to prioritize food is that whole foods naturally provide nutrients that work together.
Calcium doesn’t act alone.
Protein, magnesium, phosphorus, vitamin D, vitamin K, and many other nutrients all contribute to healthy bones.
Whole foods deliver these nutrients in combinations your body recognizes and knows how to use.
My Takeaway
Strong bones aren’t built from one supplement.
They’re built from consistent daily habits. Eat a variety of calcium-rich foods. Support your digestion. Move your body. Prioritize protein. Get enough vitamin D.
When food alone isn’t enough to meet your needs, choosing a thoughtfully designed food-based option may help fill the gap—but it should always complement a healthy lifestyle, not replace it.
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Frequently Asked Questions (FAQs)
Oxalates, also known as oxalic acid, are naturally occurring compounds found in many plants, vegetables, and fruits. They are part of a plant’s defense mechanism against predators and can be found in high concentrations in foods like spinach, rhubarb, beets, nuts, chocolate, tea, and certain beans.
Regarding bone health, oxalates can bind to minerals such as calcium in the gut, forming calcium oxalate. This compound is not easily absorbed by the body, meaning the calcium that could have been utilized for bone strengthening is instead excreted. This process can potentially lead to lower calcium availability for bone health, which can be particularly concerning for individuals at risk of osteoporosis or other bone-related issues.
However, for most women, dietary oxalates do not pose a significant threat to bone health, especially if their diet is balanced with enough calcium and they do not have a history of kidney stones.
Your gut is crucial for stronger bones for several reasons:
- Nutrient Absorption: The gut is where most nutrient absorption occurs. For bones to be healthy and strong, they need a variety of nutrients, particularly calcium, phosphorus, magnesium, and vitamin D. A healthy gut efficiently absorbs these essential nutrients from your diet and facilitates their transportation to the bones.
- Gut Microbiome and Bone Health: Research has shown that the gut microbiome (the community of bacteria living in your intestines) can influence bone density. Certain gut bacteria help in producing short-chain fatty acids (SCFAs) like butyrate, which have been shown to promote bone health. SCFAs can enhance the absorption of minerals necessary for bone strength and play a role in reducing inflammation, which can negatively affect bone health.
- Hormone Regulation: The gut helps regulate hormones that are involved in bone metabolism, including insulin, thyroid hormones, and sex hormones like estrogen. For example, estrogen is vital for bone density, and gut health can influence estrogen levels through the enterohepatic circulation, where estrogens are processed in the liver and intestines.
- Reducing Inflammation: Chronic inflammation, which can stem from poor gut health, is linked to many conditions that compromise bone strength, such as osteoporosis. A healthy gut helps to reduce systemic inflammation, protecting bones from inflammatory damage.
- Immune System Modulation: The majority of the immune system is located in the gut. An imbalance in the immune system can lead to autoimmune conditions, some of which affect the bones. Maintaining gut health helps to ensure the immune system works correctly, protecting against autoimmune reactions that could impact bone health.
In essence, maintaining a healthy gut contributes significantly to stronger bones by ensuring the effective absorption of vital nutrients, regulating hormones, reducing inflammation, and supporting a healthy immune system. Therefore, a diet rich in bone-healthy nutrients, prebiotics, and probiotics, along with lifestyle factors that promote gut health, is key to maintaining strong bones.