Is Vitamin D Vegan? A Dietitian Looks at Its Sources

by Gaby Vaca-Flores, RDN, CLE

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Gaby Vaca-Flores, RDN, CLE, recaps the benefits of vitamin D and uncovers if it exists in vegan form. Plus: how to choose the best vitamin D supplement.

Prioritizing vitamin D intake is highly recommended, especially if you follow a strict vegan or vegetarian diet. As you may already know, sunshine is a wonderful natural source of vitamin D that’s safe for omnivores and vegans alike. But what about vitamin D food sources or supplements?

Sadly, many vitamin D-rich foods and supplements aren’t vegan. But vegan options do exist! Here’s how vitamin D can benefit your health and where to find vegan-friendly food and supplement sources.

What Is Vitamin D Good For?

Vitamin D is widely recognized for its role in maintaining bone health by regulating calcium and phosphorus absorption.

Surprising to many, however, is vitamin D’s critical role in supporting other important physiological processes. These include but aren’t not limited to:

Risks of Vitamin D Deficiency

The benefits of getting enough vitamin D may just be as compelling as the reasons to avoid not getting enough.

In fact, a 2020 study warns that vitamin D deficiencies can put people at risk for skeletal issues and compromised bone health. Then, another study suggests that there are strong associations between vitamin D deficiency and cognitive decline.

Less severe (but still unfavorable) consequences of low vitamin D intake include fatigue and potential hair loss.

In short, vitamin D is an essential nutrient for optimal health and should be a component of most healthy diets. For vegans and strict vegetarians however, this may not be so simple.

Vegan vitamin D supplement Here Comes the Sun on yellow background

Sources of Vitamin D

The body receives vitamin D through three main sources:

  • sunshine and skin absorption
  • food (naturally occurring or fortified)
  • vitamin D supplements

Sunshine is the most natural way to synthesize vitamin D in the body. However, relying on the sun-to-skin method can increase the risk of skin damage.

Vitamin D Food Sources

Unfortunately, vitamin D is often a challenging nutrient for vegans and vegetarians to consume adequately.

Vitamin D isn’t present in its bioavailable form in most plant-based foods. Consequently, many of the best food sources of vitamin D are in animal-based products like egg yolk, fatty fish, and liver.

In turn, vegans and vegetarians often have to rely on processed, fortified foods to contribute to their daily vitamin D intake.

When a food is fortified, it means that specific nutrients have been added to enhance its nutritional profile. Dairy and plant-based milk, juice, and cereal are often fortified with vitamin D. Eating fortified foods can be beneficial for vegans and vegetarians.

Supplements

Alternatively, you can take vitamin D supplements. They can help fill in potential nutrient gaps in your diet, particularly in those that increase the risk for nutrient deficiencies.

As a dietitian, I believe that one of the best ways to optimize vitamin D intake—especially for vegans and vegetarians—is through supplementation.

Non-Vegan vs. Vegan Vitamin D Supplements

Types of Vitamin D

There are two main types of vitamin D:

  • vitamin D2 (ergocalciferol)
  • vitamin D3 (cholecalciferol)

Of the two forms, vitamin D3 is the gold standard for supporting healthy vitamin D levels.

Calcifediol is a term that describes the final form of vitamins D2 and D3 once the liver breaks them down. Vitamin D status is a reflection of the blood’s level of calcifediol. Collectively, researchers have suggested that vitamin D3 is more effective in raising calcifediol levels than vitamin D2.

Unfortunately, the most common sources of vitamin D in plants and fortified plant-based foods are as vitamin D2. Similarly, many vitamin D supplements aren’t vegan because they rely on animal-based sources of vitamin D3 such as the skin of fatty fish and lanolin from sheep’s wool.

If you follow a vegan diet, be sure to check the label to avoid these non-vegan sources in your vitamin D supplement.

Lichen in nature, which is a natural source of vegan vitamin D

Lichen Vitamin D

Luckily, there’s a quality, vegan-friendly source of vitamin D3 in supplements: lichen.

Lichen is an algae-fungal hybrid microorganism. This small gray-yellow plant grows on trees and stones. It’s the only plant that contains vitamin D in its most bioavailable form: vitamin D3 cholecalciferol.

For this reason, vegans should look for lichen-based vitamin D supplements.

How to Take Vitamin D

It’s fair to say that lichen is a pretty big deal. But before you search for the best vegan vitamin D supplement, it’s important to consider how to get the most of your supplement routine.

Make Sure It Includes Fat

Vitamin D is fat-soluble. For this reason, taking it with fat can significantly enhance its absorption, thus maximizing its benefits.

I suggest looking for a vegan vitamin D formula that contains a fat component. We like to use extra virgin olive oil for best results.

Recommended Dose of Vitamin D

According to the National Institutes of Health, most adults should aim for a vitamin D daily dose of at least 600 IUs. However, experts believe this recommendation is too low and suggest that higher doses can lead to better health outcomes.

In fact, research shows that taking 2,000 IUs (or 50 micrograms) of vitamin D3 daily can help achieve better a vitamin D status. That said, I recommend finding a vitamin D supplement that contains 2,000 IUs of vitamin D3 in cholecalciferol, its most bioavailable form.

Lastly, you might be wondering how much vitamin D is too much. I don’t suggest exceeding 4,000 IUs per day—the tolerable upper limit for adults—without first consulting your doctor.

The Bottom Line

To review, there actually are vegan sources of vitamin D. While they’re especially helpful for those on plant-based diets, they work just as well for people who eat animal products.

When shopping for a vegan vitamin D supplement, look for these three key traits:

  1. Check if it’s vitamin D from lichen vs. lanolin (in D3 cholecalciferol form)
  2. Ensure that lichen D3 contains a fat component (such as EVOO)
  3. Look for one that packs 2,000 IUs of vitamin D3 (cholecalciferol)

The days of asking yourself if vitamin D is vegan are over. With that said, if you’re a vegan, strict vegetarian, or are simply looking for a plant-based formula, be sure to get your hands on a vitamin D3 supplement sourced from lichen to reap all the benefits that the sunshine vitamin has to offer.


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