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Why Winter Tiredness Feels Different
by Solmate
on Aug 10 2026
Winter tiredness isn't the same as normal tired. It's heavier, less responsive to sleep, more diffuse. Why that is biologically — and how to tell ordinary fatigue from something worth addressing.
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What Vitamin D Actually Does in the Body
by Solmate
on Aug 10 2026
Vitamin D is not just about bones. A clear walk through what it does in the body — calcium absorption, immunity, muscle function, mood, brain — and why its effects depend on the nutrients alongside it.
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Vitamin D2 vs D3: What's the Difference?
by Solmate
on Aug 10 2026
Vitamin D2 vs D3 — sources, chemistry, effectiveness, and what the research says about which raises blood levels best. A clear answer to the most-Googled question about vitamin D supplements.
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Why Most Vitamin D Supplements Feel Incomplete
by Solmate
on Aug 10 2026
Most vitamin D supplements stop at D3. The body doesn't. Why K2, magnesium, B vitamins and zinc matter — and what to actually look for in a daily formula.
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Why the NHS Recommends Vitamin D in Winter
by Solmate
on Aug 10 2026
The NHS recommends a daily 10 microgram vitamin D supplement for everyone over the age of one from October to March. Here is exactly why, what the SACN evidence says, and who needs to pay particular attention.
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Mounjaro and Vitamin D Deficiency: What the Research Shows
by Solmate
on May 20 2026
Mounjaro users have a 49% higher risk of vitamin D deficiency. Here is the dose, the test to ask for, and what to do this week.
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Why Vitamin D Matters More in the UK
by Solmate
on May 19 2026
The UK has a vitamin D problem rooted in latitude, climate and lifestyle. What the NHS recommends, what the evidence says, and what to do about it.