Vitamin D and Men's Health: Why Every Man Should Test

June is Men's Health Month in Canada — and with Father's Day around the corner, it's the perfect moment to talk about one of the simplest, most overlooked pieces of men's health: vitamin D.

Every June, the Canadian Men's Health Foundation reminds us of a stubborn truth: men are far less likely than women to get checked, track their numbers, or ask for help - yet a large share of men's health problems are considered preventable. This year's Suspenders On campaign is built around exactly that idea: a small, visible nudge to start the conversations that matter.

So let's start one. It begins with a vitamin most of us assume we're getting enough of - and most of us aren't.

The gap hiding in plain sight

In Canada, sunlight does a lot of the work of making vitamin D — and for much of the year, there simply isn't enough of it. The result shows up in the national data: about 1 in 3 Canadians fall below the recommended vitamin D level, and that climbs to roughly 40% in the winter months, according to Statistics Canada.¹

And one detail makes it especially relevant: adults aged 20 to 39 have the lowest rate of vitamin D adequacy of any age group — often the very men least likely to give it a thought.¹

It doesn't affect every man equally

Here's what the numbers make clear: the further your skin and your latitude are from year-round equatorial sun, the harder your body has to work to make vitamin D. Melanin — the pigment that gives skin its colour — absorbs the UVB rays that produce vitamin D, so men with darker skin make less of it from the same amount of sun. Add a Canadian winter, and the gap widens.

Canadian data makes the pattern clear. A large study built on the Canadian Health Measures Survey found that ethnicity was the single strongest predictor of vitamin D status, with immigrants showing insufficiency at roughly 53% versus 32% for those born here.² In short, across backgrounds:

• East and Southeast Asian men showed the highest deficiency in the Canadian survey — though levels tend to climb the longer someone's lived here.²
• South Asian men consistently rank among the lowest in northern countries.³
• Black men are at high risk: in one study, 61% were insufficient — and even most of those taking vitamin D still came up short.⁴
• White men with limited sun aren't exempt — indoor work, northern latitude, and a Canadian winter put most of us in the same boat.¹

The takeaway is the same for everyone: the only way to know which group you're in is to test.

Why it matters at every age

Vitamin D is best known for bone health, but research keeps exploring its role across a man's whole life:

• 20s–30s — hormones. This is the age group with the lowest vitamin D adequacy. In one study of nearly 3,000 men, those with the lowest levels were about 50% more likely to have low testosterone.⁵
• Mid-life — mood. The heart of what Men's Health Month is really about. In a study of ~3,400 men, the odds of depression rose roughly 70% across the lowest vitamin D levels — a low-pressure number to start a conversation men often avoid.⁶
• Later life — strength. Older men low in vitamin D were more than twice as likely to show age-related muscle loss, an association researchers didn't see in women.⁷

A fair caveat: these are observational findings, and factors like body weight play a role — vitamin D isn't a magic switch for testosterone, mood, or strength. But the pattern across ages is consistent enough to make the point: it's a number worth knowing, and for men it tends to go unchecked.

The catch? You can't feel your vitamin D level. The only way to know is to test.

Test, support, retest: closing the loop

This is where it gets refreshingly simple. Knowing your vitamin D status doesn't require a clinic visit or a needle at a lab.

1. Test. An at-home Vitamin D Test Kit lets you check your level from your kitchen table, with a personalized results report.
2. Support. If your level is low, a daily vitamin D supplement — like our ImmunoDrops™ D3 or D3 + K2 — helps maintain healthy vitamin D status over time.
3. Retest. Here's the step most people skip. Vitamin D levels respond gradually, so the guidance is to retest your vitamin D levels after supplementation at 8–12 weeks to confirm you've actually reached a healthy range — not just assume you have.

That loop — test, support, retest — turns "I take a vitamin D pill sometimes" into "I know my number, and I know it's where it should be." It's the difference between guessing and knowing.

A Father's Day gift that actually says something

Most Father's Day gifts get used once and forgotten. A tie. A mug. Another gadget.

This Men's Health Month, you can give the man in your life something different: a way to take charge of his health, starting with one simple number. It's the kind of gift that says I want you around for a long time — without making it a big, awkward conversation.

And right now, our Father's Day bundles make it easy:

 

The 2 Test Kits + D3 bundle is the one we'd point a dad toward — it covers the full loop: test now, support with D3, and retest in 8–12 weeks to see the change. (Two kits also means one for him and one for the partner, or one to share with a friend who needs the nudge, or he can use the second kit for the retest.)

The sale runs through Sunday, June 21 — and ships across Canada.

This Father's Day, skip the tie. Give him a number worth knowing.

Shop the Father's Day Sale HERE

---

This article is for general information and isn't medical advice. Vitamin D supplements help maintain healthy vitamin D levels; they aren't intended to diagnose, treat, or cure any condition. If you have questions about your health or your vitamin D status, talk to a healthcare practitioner.

Footnotes

1. Statistics Canada, Vitamin D blood levels of Canadians. https://www150.statcan.gc.ca/n1/pub/82-624-x/2013001/article/11727-eng.htm ↩ ↩² ↩³

2. Vitamin D Status among First-Generation Immigrants from Different Ethnic Groups and Origins (Canadian Health Measures Survey). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8400966/ ↩ ↩²

3. Inadequate vitamin D status in children of South Asian ethnicity living in the National Capital Region of Canada. https://cdnsciencepub.com/doi/10.1139/apnm-2021-0203 ↩

4. Prevalence and correlates of vitamin D status in African American men. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2708155/ ↩

5. Vitamin D is associated with testosterone and hypogonadism in Chinese men (SPECT-China study). https://link.springer.com/article/10.1186/s12958-015-0068-2 ↩

6. Lower vitamin D levels are associated with depression among community-dwelling European men (European Male Ageing Study). https://eprints.gla.ac.uk/40811 ↩

7. Associations Between Vitamin D Deficiency and Sarcopenia in South Korean Adults (2022 KNHANES). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12567185/ ↩