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In Fitness And In Health

Medium’s largest collection of science-based and experience-backed insights for a fitter, healthier, and happier you.

Who Should Take Vitamin D Supplements?

And who probably shouldn’t bother

9 min readAug 20, 2025

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Photo by Johen Redman on Unsplash

Imagine a vitamin that could enhance your immune system, reduce the risk of fractures, reduce the symptoms of depression, and perhaps even support your gains in the gym.

Now imagine it’s completely free, produced by your body when you're exposed to sunlight, and yet, somehow, half the world’s population have low levels of it.

Yep, we’re talking about vitamin D.

It’s not a sexy supplement like creatine or a fat burner with flames on the label. But it is important, and often misunderstood.

So, who actually needs to supplement with vitamin D? Is it everyone? Just the elderly or gym bros who never see the sun?

Or is the hype overblown?

Let’s dig into it!

What is Vitamin D?

Vitamin D is technically a hormone as well as a nutrient. Some foods naturally contain vitamin D, such as fatty fish, egg yolks, and liver. Other foods, like milk and cereals, are fortified with vitamin D.

Vitamin D is more than just one vitamin; it’s a family of nutrients that shares similarities in chemical structure. Vitamin D2 (ergocalciferol) and Vitamin D3 (cholecalciferol) are the most common; D3 is only found…

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In Fitness And In Health
In Fitness And In Health

Published in In Fitness And In Health

Medium’s largest collection of science-based and experience-backed insights for a fitter, healthier, and happier you.

Daniel Hopper
Daniel Hopper

Written by Daniel Hopper

A marketer and gym addict who shares their knowledge and passion for health and fitness, and more. Inquiries: danz_nz@hotmail.com

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