Journal
Supplement Guides
Evidence-led guides written for UK readers, using NHS, SACN and peer-reviewed sources. Food first, supplements where they genuinely add something.
How to use these guides
Each guide covers what a nutrient is, what it does, where to find it in an ordinary UK diet, who may be at higher risk of low intake, what the research shows about supplements, and safe upper limits. Supplements are not medicines and should not replace a varied diet. If you are pregnant, breastfeeding, taking medication or have a medical condition or symptoms that concern you, speak to a GP, pharmacist or registered dietitian.
Vitamins
Fat-soluble and water-soluble vitamins: what they do, UK intakes, food sources and safe use.
Vitamin D: UK Guidance, Sunlight, Food Sources and Safe Use
Read guideVitamin C: Roles in the Body, Food Sources and Supplement Evidence
Read guideVitamin B12: Dietary Sources, Risk Groups, Testing and Supplements
Read guideVitamin B Complex: What It Contains, When It May Help and Safety
Read guideBiotin: What It Contributes To, Deficiency and Test Interference
Read guideVitamin A: Food Sources, Safe Intake and Why Excess Can Be Harmful
Read guideVitamin E: Food Sources, Antioxidant Role and Supplement Safety
Read guideVitamin K2: What It Is, How It Differs From K1 and What Evidence Shows
Read guide
Minerals
Essential minerals, dietary sources, absorption and the upper limits worth respecting.
Essential Fats
Omega-3 fats from oily fish, plant sources and algal oil, and what the trial evidence shows.
Gut Health
Live cultures, strain specificity and how to read probiotic claims critically.
Choosing Supplements
How to judge a product, when supplementation is unnecessary, and where evidence is thin.
Educational information only. It is not medical advice and does not replace consultation with a qualified healthcare professional. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle.