Vitamin & supplement guides for UK adults
Science, simplified — wellness reads from the Vitgem team.
Every article is fact-checked under our editorial policy, and we publish our own UK supplement search data.
Ashwagandha Side Effects: What Is Commonly Reported and What Is Rare
Mild stomach upset, loose stools and drowsiness lead the reports at trial doses of 250–600 mg; five published cases of liver injury are the rare exception....
Vitamin D Foods: What Actually Contains It, and How Much
Official UK food composition data, portion by portion: grilled herring gives 19.2 micrograms of vitamin D and grilled salmon 8.3, while one egg gives 1.7 and...
Lion's Mane Side Effects: What the Evidence Reports
Mild digestive upset in under one in ten users, skin rash in the only 49-week trial, and no case of liver injury on record. What the...
Is Vitamin D and D3 the Same? D2 vs D3, Explained
Vitamin D3 is one form of vitamin D, not another name for it. What separates D2 from D3, why a UK trial found D3 raised blood...
Menopause Supplements: What the Evidence and the Law Actually Say
No food supplement in Great Britain may claim to relieve menopausal symptoms. Which nutrients hold authorised claims, what the trial evidence on the botanicals really shows,...
Do Gummy Vitamins Work? What the Evidence Actually Shows
A randomised trial found vitamin D3 gummies produced about twice the blood exposure of the same dose in tablets. The absorption question, the sugar question and...
Vitamin K2 and Vitamin D3: How They Work Together
Vitamin D3 raises how much calcium you absorb; vitamin K2 activates the proteins that decide where it goes. What each one is legally allowed to claim...
Lion's Mane Benefits: What the Human Evidence Really Shows
Lion's Mane benefits reviewed: 5 RCTs, a pooled MMSE gain of 1.17 points, and why single doses showed nothing. Honest look at a small evidence base.
Ashwagandha Benefits for Women and Men: What the Research Shows
Ashwagandha benefits for women and men, UK evidence guide: stress down 4.88 points and cortisol down 2.36 in trials of 873 adults. Side effects, timing, safety.
Ashwagandha for Sleep UK: What the Research Actually Shows
A 2021 meta-analysis of five randomised trials found a small but significant effect on sleep, strongest at 600 mg a day over eight weeks in adults...
Herbal Sleeping Tablets UK: What the THR Mark Really Means
Valerian and passionflower tablets carry an MHRA registration mark. It certifies safety, quality and 30 years of traditional use, not that the product works.
Best Sleeping Pills UK 2026: What GPs Actually Recommend
The NHS says GPs now rarely prescribe sleeping pills for insomnia. Here is what is actually available in the UK, what NICE recommends instead, and where...
What Are Sleep Gummies & Do They Actually Work?
Sleep gummies are everywhere — chewable, fruit-flavoured and marketed as an easy way to wind down. But behind the friendly packaging sit some genuinely important questions:...