Can You Get Enough Calcium Without Dairy?

"Where do you get your calcium from?"

After "Where do you get your protein?", it's probably the question I'm asked most often as a dietitian who follows a plant-based diet.

It's an understandable question. Most of us grew up with the message that dairy equals calcium, and calcium equals strong bones.

But calcium is a nutrient, not a food group.

While dairy foods can certainly contribute calcium, they aren't the only source. In fact, it is entirely possible to meet your calcium needs on a plant-based diet.

Let's take a closer look.

How Much Calcium Do Women Need?

In Australia, calcium recommendations are established through the Nutrient Reference Values (NRVs).

For women aged 19–50 years:

·       Estimated Average Requirement (EAR): 840mg per day

·       Recommended Dietary Intake (RDI): 1,000mg per day

For women aged 51 years and over:

·       EAR: 1,100mg per day

·       RDI: 1,300mg per day

The increase after age 50 reflects changes associated with menopause, including increased calcium losses and potential reductions in calcium absorption.

Interestingly, calcium requirements do not increase during pregnancy or breastfeeding for women over 18 years of age.

Why Do We Need 1,000mg If Our Bodies Only Require Around 520mg?

This is where things get interesting.

The NRVs are based on evidence showing that adult calcium balance occurs at around 520mg of absorbed calcium per day.

In other words, our bodies don't actually need to retain 1,000mg of calcium each day.

The reason recommendations are higher is because:

·       We lose calcium through urine, sweat and other normal body processes.

·       We don't absorb all of the calcium we eat.

This means we need to consume significantly more calcium than our bodies ultimately retain.

And that's why absorption matters.

Not All Calcium Is Absorbed Equally

One of the biggest misconceptions about calcium is that all sources are absorbed the same way.

They aren't.

Some plant foods contain calcium that is absorbed just as well as dairy milk. Others are absorbed even better.

And some foods that appear rich in calcium on paper provide very little usable calcium because compounds within the food reduce absorption.

Best Absorbed Plant-Based Calcium Sources

Food	Approximate Absorption
Kale	~50%
Bok choy	~50%
Pak choy	~50%
Chinese cabbage	~50–60%
Calcium-fortified soy milk	~30%
Cow's milk	~30%

One important takeaway?

Calcium-fortified soy milk is absorbed similarly to cow's milk, making it an excellent option for plant-based eaters.

Moderately Absorbed Plant-Based Calcium Sources

Food	Approximate Absorption
Calcium-set tofu	~25–35%
Broccoli	~40%
Tahini	~20–25%
Almonds	~20%

These foods can make a meaningful contribution to your daily calcium intake and are easy to include as part of regular meals.

Lower Absorbed Plant-Based Calcium Sources

Food	Approximate Absorption
Spinach	~5%
Silverbeet	~5%
Beet greens	~5%

These vegetables contain calcium, but they also contain compounds called oxalates that dramatically reduce absorption.

That doesn't mean you should avoid them. They're incredibly nutritious foods.

It simply means they shouldn't be relied upon as your primary source of calcium.

Do Plant-Based Eaters Get Enough Calcium?

The Australian NRVs note that vegans tend to have lower calcium intakes than vegetarians and omnivores.

However, they also note that both lacto-vegetarians and vegans can achieve calcium balance.

This is an important distinction.

The question isn't whether calcium can be obtained from plant foods.

It can.

The question is whether enough calcium-rich foods are included consistently throughout the diet.

What Does 1,000mg of Calcium Look Like in a Day?

Here's an example of how a woman following a plant-based diet could comfortably meet the RDI for calcium.

Breakfast

1 cup calcium-fortified soy milk in oats, cereal, chia pudding or coffee

Approximate calcium: 300mg

Lunch

Salad with 2 cups kale and 1 tablespoon tahini dressing

Approximate calcium: 260mg

Dinner

Stir-fry with 100g calcium-set tofu and broccoli or Asian greens

Approximate calcium: 450mg

Snack

30g almonds

Approximate calcium: 75mg

Total

Approximately 1,085mg calcium

And that's before accounting for any additional calcium that may come from snacks, legumes, breads or other foods consumed throughout the day.

The Bottom Line

You do not need dairy to meet your calcium requirements.

What you do need is an understanding of which foods provide meaningful amounts of calcium and which sources are best absorbed.

Calcium-fortified soy milk, calcium-set tofu, Asian greens, kale, tahini and almonds can all contribute to a calcium-rich plant-based diet.

The goal isn't to replicate dairy.

The goal is simply to meet your calcium needs.

And with a little planning, that's entirely achievable on a plant-based diet.

If you are looking for inspiration and ways to include these calcium rich plant foods into your diet head to our recipe pages to try our seeded nut bar you can make with almonds and tahini or our tofu recipes!