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Which nuts and seeds are highest in calcium?

4 min read

Adults need 1,000 to 1,200 milligrams of calcium daily, depending on age, according to the NIH. Dairy is a common source, but many are surprised to learn which nuts and seeds are highest in calcium, often providing a significant portion of daily needs in a single serving.

Quick Summary

This article explores the best nuts and seeds for calcium, detailing nutritional value and how to increase bone health through plant-based options. Practical suggestions are provided for incorporating these calcium-rich foods into daily diets.

Key Points

  • Poppy Seeds Lead Seeds: Per tablespoon, poppy seeds provide a remarkable amount of calcium, making them one of the highest plant-based sources.

  • Almonds Top the Nuts: A single serving of almonds offers more calcium than any other tree nut, alongside vitamin E and magnesium for bone health.

  • Sesame Seeds are Potent: Unhulled sesame seeds and tahini are concentrated sources of calcium, copper, and zinc, which are all beneficial for bones.

  • Chia Seeds are a Powerhouse: In addition to omega-3s, chia seeds deliver a large dose of calcium and contain boron, which helps your body metabolize calcium.

  • Bioavailability Varies: While some foods contain more calcium, the body's ability to absorb it can differ. Combining calcium sources from various food groups is the best approach.

  • Simple Ways to Boost Intake: Sprinkling seeds on meals, adding nuts to snacks, and blending them into smoothies are easy ways to increase daily calcium intake.

In This Article

Top Nuts for Calcium

Nuts offer a variety of essential nutrients, and some stand out for their exceptional calcium content. They are excellent additions to any diet, particularly for those looking for non-dairy sources of this key mineral.

Almonds

Almonds are consistently ranked as one of the best nuts for calcium. A 30-gram serving (approximately one handful) provides about 80mg of calcium. Beyond calcium, almonds are rich in protein, fiber, healthy fats, magnesium, and vitamin E, which supports skin health. The combination of these nutrients makes them excellent for bone density and overall wellness. While some studies note that the bioavailability of calcium in almonds is relatively low (below 9%), their high overall content still makes them a valuable source.

Brazil Nuts

Beyond their reputation as a top source of selenium, Brazil nuts also contribute a solid amount of calcium. A 30-gram serving can provide around 51mg of calcium. The mineral profile of Brazil nuts, which includes magnesium and phosphorus, also works synergistically with calcium to support bone health.

Hazelnuts

Hazelnuts are another nut worth noting, providing approximately 114mg of calcium per 100g. They are also known for their healthy fats and pleasant flavor, making them a great ingredient for both sweet and savory dishes. Adding a handful of hazelnuts to your daily intake can contribute meaningfully to your calcium targets.

Top Seeds for Calcium

Seeds often surpass nuts in their calcium density, making them a highly concentrated source of the mineral. A small amount can deliver a significant nutrient boost.

Poppy Seeds

Poppy seeds are perhaps the most surprising entry, packing a tremendous amount of calcium into a tiny package. A single tablespoon (9 grams) of poppy seeds contains about 127mg of calcium. In fact, 100 grams of poppy seeds contains a remarkable 1,250mg of calcium, making them one of the densest plant-based sources available. They also provide fiber, protein, and magnesium, and can be added easily to breads, salads, or sauces.

Sesame Seeds

Sesame seeds are a close contender for the top spot. A single tablespoon of unhulled sesame seeds offers about 88mg of calcium. This versatility makes sesame seeds a kitchen staple for boosting calcium. Tahini, a paste made from sesame seeds, is also an excellent option, with a tablespoon containing about 63.9mg of calcium.

Chia Seeds

These tiny seeds are famous for their omega-3 fatty acids, but they are also an excellent source of calcium. One ounce (approximately 2 tablespoons) of chia seeds provides around 179mg of calcium. Chia also contains boron, which helps the body metabolize calcium and magnesium, further supporting bone health. They can be mixed into smoothies, yogurt, or oatmeal to create a nutrient-dense meal.

A Comparison of Calcium in Nuts and Seeds

This table provides a quick overview of the calcium content per serving for the leading nuts and seeds. It's important to note that serving sizes vary, but this comparison highlights the potency of seeds.

Food Item Serving Size Approximate Calcium Content
Poppy Seeds 1 tablespoon (9g) 127mg
Chia Seeds 1 ounce (2 tbsp) 179mg
Sesame Seeds (unhulled) 1 tablespoon 88mg
Almonds 1 ounce (30g) 80mg
Brazil Nuts 30g 51mg
Hazelnuts 100g 114mg

How to Incorporate More Calcium-Rich Nuts and Seeds into Your Diet

Adding these nutritional powerhouses to your daily routine can be simple and delicious. Here are some ideas:

  • Morning Boost: Sprinkle poppy or sesame seeds over your oatmeal or yogurt. Create a chia seed pudding by soaking chia seeds in your preferred milk overnight with a little sweetener and fruit.
  • Snack Time: Snack on a handful of almonds or make a homemade trail mix with a variety of nuts and seeds. Raw or dry-roasted versions are best for controlling sodium intake.
  • Savory Meals: Use tahini (sesame paste) in salad dressings or sauces. Add chopped nuts to salads or stir-fries for extra crunch and nutrients. Use a nut-based pesto for pasta or roasted vegetables.
  • Baking: Incorporate almond flour into baked goods for a calcium and protein boost. Use seeds as a topping for bread, muffins, or cakes.
  • Smoothies: Blend almonds or chia seeds into your morning smoothie for a creamy texture and a significant calcium kick.

Conclusion

To increase dietary calcium, turning to nature's concentrated sources is a smart strategy. Poppy seeds, chia seeds, and sesame seeds lead the charge among seeds, while almonds offer the most calcium among common nuts. By integrating these versatile and nutrient-dense foods into your meals, you can effectively support your bone health and overall wellness, even if you are avoiding dairy. Remember to consume a variety of these options to benefit from the broad spectrum of vitamins and minerals they offer, and always aim for moderation as part of a balanced diet.

For more information on the role of nutrition in disease prevention, consult studies like those from the National Institutes of Health.

Frequently Asked Questions

Almonds are the best tree nut for calcium, offering about 80mg per 30-gram serving. However, for a higher concentration, certain seeds contain more calcium per tablespoon.

Yes, on a gram-for-gram basis, many seeds like poppy and sesame seeds contain a higher concentration of calcium than nuts. A single tablespoon of poppy seeds has more calcium than a handful of almonds.

You can add more seeds by sprinkling them on yogurt, oatmeal, or salads. Chia seeds can be used to make puddings, and sesame seeds can be used in sauces like tahini or as a topping for baked goods.

The recommended dietary intake for calcium varies by age. For most adults between 19 and 50, it is 1,000mg per day. For women over 51 and adults over 71, it increases to 1,200mg per day.

Roasting or soaking does not significantly impact the calcium content of nuts and seeds. Soaking can sometimes increase the bioavailability of minerals by reducing phytic acid, while roasting can enhance flavor.

While nuts and seeds are excellent sources, a varied diet is best for meeting calcium needs. They should be part of a broader diet that includes other calcium-rich foods like leafy greens, fortified products, and dairy (if consumed).

Yes, unhulled black sesame seeds are significantly higher in calcium than hulled white ones. Unhulled seeds retain the calcium-rich outer hull, which is removed from white sesame seeds.

References

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Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.