Can You Get Enough Calcium On A Paleo Diet?

If you've told anyone you follow a Paleo diet, one of the typical responses you’ve probably got back, is bound to be “but how can you get enough Calcium?”

As part of any healthy lifestyle it is essential to have a decent amount of calcium in the diet, as it is involved in so many crucial functions. Calcium is known to strengthen the bones and teeth and can help to reduce the risk of suffering from osteoporosis, which causes brittle bones and can be very detrimental in the quality of life for sufferers. It is also thought the mineral can help to prevent cardiovascular disease and other illnesses which can cause a lot of problems in later life.

In order to really get the benefits from calcium, it is important to incorporate it with other nutrients and vitamins, as they work in conjunction with each other to produce the most effective results. Vitamins such as C and D3 help the body to absorb calcium so that the benefits are maximised. If these vitamins are not present in the diet, it won’t be absorbed sufficiently, which means the calcium won’t offer the benefits you would expect from it.

We don’t all require the same intake of calcium; there are factors which affect the level of calcium we should consume in our diet. Children require a lower level than adults and women are usually required to take in more calcium than men. Pregnant women should also try to take in a higher level of calcium as it will be beneficial for both mother and baby.

We know that calcium is essential for the body, but we have been led to believe that we need a lot more in our diet than what we actually need. It is also a misconception that the only way we can get the calcium we need is through the consumption of dairy products and in particular milk, which is not the case. There are many other foods which provide a good quantity of calcium and more than enough to ensure we have an adequate amount in our bodies. It can also be detrimental if we consume too much calcium, as it inhibits the absorption of magnesium. Magnesium is important for a healthy body and a lack of this can have an adverse effect on the body.

As a strict Paleo diet excludes dairy, many people wrongly assume eating this way will result in a Calcium deficiency. However, this simply is not the case. Not only are there some far better sources than milk – when the processed foods are removed from your diet your calcium requirements are actually lower. In fact, it is not calcium intake that is important, rather calcium balance. Processed things such as soft drinks actually use calcium in their digestion – effectively leeching calcium from your body. If you eat a lot of these types of foods, your calcium requirements are clearly going to be a lot higher. When you eat a natural Paleo diet – real food – your requirements are going to be a lot less.

Good Paleo Calcium Sources

There are lots of foods other than dairy products which many people just don’t associate with calcium. These foods act as a good source of calcium and provide us with other health benefits, including providing an adequate amounts of essential vitamins and other minerals.

Leafy green vegetables are a great calcium sources, as are high quantity of fish, such as salmon and mackerel. These can also offer a substantial amount of the mineral, as well as providing us with vitamins and antioxidants which are the perfect way of maintaining a healthy lifestyle.

Walnuts and hazelnuts are other foods which act as a good source of calcium. It is important not to eat too many of these though due to the Omega 3/6 ratio, so sticking to a low quantity will achieve the desired result. Eggs are also a way of ensuring calcium is present in the body and in particular egg yolks are a good source. It is a good idea to take note of the calcium levels of the foods you are eating, so you know whether you are taking in too much or too little.

How Lifestyle Affects Calcium Retention

It’s not just diet that affects your calcium levels — lifestyle factors also play a significant role in calcium retention and bone health. Regular physical activity, especially weight-bearing exercises like walking, hiking, or strength training, stimulates the production of osteoblasts, which are the cells responsible for building bone. This means that movement isn’t just good for your heart and muscles — it directly supports strong bones and better calcium utilisation.

On the flip side, a sedentary lifestyle or prolonged periods of inactivity can increase the risk of bone density loss over time. This is another reason the Paleo lifestyle, with its emphasis on natural movement and staying active, provides more than just dietary benefits. Being outdoors and physically engaged also increases your Vitamin D exposure, further supporting your body’s ability to absorb and regulate calcium effectively.

Hidden Calcium Stealers in Modern Diets

While many people worry about not getting enough calcium, fewer consider the modern-day calcium stealers that are so prevalent in today’s diets. Phytic acid, for instance, is found in high concentrations in grains and legumes — foods not typically included in a Paleo diet. Phytic acid binds to minerals like calcium and magnesium in the digestive tract, making them less bioavailable. This means that even if your calcium intake looks adequate on paper, it may not be effectively absorbed if your diet is high in these anti-nutrients.

Excessive salt, caffeine, and alcohol are also known to reduce calcium absorption or increase calcium excretion. Many processed and convenience foods are very high in sodium, which increases calcium loss through the urine. Similarly, a heavy coffee or alcohol habit can interfere with your mineral balance over time. By focusing on a whole-foods Paleo approach and limiting or eliminating these substances, you're already helping to protect your body’s calcium stores naturally.

Bioavailability of Calcium in Paleo Foods

Not all calcium-rich foods are created equal. Bioavailability — how well the body can absorb and utilise the calcium — is just as important as the amount. For example, dark leafy greens such as kale and bok choy have high calcium content and excellent bioavailability, meaning your body can actually use most of the calcium they provide. Spinach, although rich in calcium, contains high levels of oxalates which inhibit absorption, so it shouldn’t be relied on as a primary source.

Bone-in fish like sardines and salmon are particularly beneficial because their small, soft bones are a highly bioavailable calcium source. If you’re eating canned versions, look for those labelled “with bones” and opt for sustainably sourced brands when possible. Homemade bone broth is another excellent addition to a Paleo diet. Not only is it rich in collagen and minerals, but slow simmering of the bones releases calcium into the broth, making it a nourishing and absorbable way to support bone health.

Supporting Minerals and Nutrients for Strong Bones

Calcium doesn’t act alone. Several other nutrients play essential roles in maintaining strong bones and ensuring calcium is properly absorbed and distributed. Magnesium is critical for converting vitamin D into its active form, which in turn regulates calcium metabolism. Foods like avocado, dark chocolate (85%+), leafy greens, and pumpkin seeds are good Paleo-friendly sources of magnesium.

Vitamin K2 is another essential nutrient, helping to direct calcium to where it belongs (in your bones and teeth) and prevent it from depositing in soft tissues and arteries. While K2 isn’t abundant in many foods, it’s found in pasture-raised egg yolks, grass-fed animal fat, and fermented foods like sauerkraut. Liver, another highly nutrient-dense food often consumed in a Paleo diet, also provides small but beneficial amounts of K2.

Practical Tips for Ensuring Adequate Calcium on Paleo

• Include a variety of dark leafy greens daily — rotate between kale, collards, turnip greens and bok choy for best results.
• Incorporate bone-in canned fish like sardines into your weekly meals.
• Add a mug of homemade bone broth as a regular part of your diet — especially in winter.
• Snack on nuts and seeds in moderation, prioritising those with better omega ratios like macadamias and pumpkin seeds.
• Eat pasture-raised egg yolks for small, consistent amounts of calcium and K2.
• Stay active with daily walking, strength training or bodyweight movements to support bone density.
• Get safe sun exposure to help your body synthesise vitamin D naturally, especially in the warmer months.

Final Thoughts on Paleo and Calcium

The belief that dairy is the only pathway to strong bones is outdated and overlooks the complexity of calcium absorption and the body’s true needs. With the right mix of real, nutrient-dense food, daily movement, and sun exposure, the Paleo lifestyle offers everything you need to maintain strong bones and a balanced calcium intake — without the need for milk or processed supplements.

If you’re concerned about your calcium levels, consider speaking with a nutrition-savvy health professional and track your intake for a few days to get a clear picture. You might be surprised to learn that you’re already getting more than enough calcium — naturally, and without compromise.

Do you eat dairy? Where do you get most of your calcium from? Share in the comments below!