Supplement Guides
Evidence-based UK guides to help you choose and use supplements well. Every guide is written to be honest about what the research does and doesn't show. Browse by health area below.
Sleep, Stress & Calm
- Best Magnesium Supplements UK: What to Look For
- Best Magnesium for Sleep
- Magnesium Glycinate vs Citrate
- What Is a 3-in-1 Magnesium Supplement?
- When to Take Magnesium Glycinate
- Which Magnesium Is Gentlest on the Stomach?
- Magnesium Glycinate: The Research
- What's in a Natural Sleep Supplement?
- What Is KSM-66 Ashwagandha?
- Root-Only vs Full-Spectrum Ashwagandha
- What Does "Standardised to 5% Withanolides" Mean?
- Which Form of Ashwagandha Is Most Effective?
- Why Is L-Theanine Added to Ashwagandha?
- Ashwagandha & L-Theanine Together
- Ashwagandha and Vitamin B6 Together
- Ashwagandha or L-Theanine: Which for Sleep?
- Ashwagandha & L-Theanine: Night or Morning?
- Magnesium, L-Theanine & Ashwagandha Together
- Is Ashwagandha KSM-66 Better Than Magnesium?
- What's Better, Ashwagandha or Maca?
Energy & Longevity
- Best NMN Supplement UK
- What Is NAD+ and Why It Matters
- Vitamin B12: The Complete Guide
- What Vitamins Help With Tiredness?
- What Is Creatine and How Does It Work?
- NMN vs NR: Which Is Right for You?
- Active Forms of B12 Explained
- Creatine: Monohydrate vs HCl
- What Is NMN and Why Do People Take It?
- What Is Nicotinamide Riboside (NR)?
- NMN Dosage Over 50
- Quercetin and Resveratrol in NAD+ Supplements
- How Does NAD+ Change With Age?
- Cyanocobalamin vs Methylcobalamin
- What Is Hydroxocobalamin?
- B12 or B Complex: Which Is Better for Energy?
- B12 and Energy: The Honest Answer
- Creatine for Women Over 40
Immunity & Daily Essentials
- Best Vitamins for Immunity UK
- Best Vitamin D3 & K2 Supplements UK
- Zinc Forms, Copper & Dosage
- Best Multivitamin Supplements UK
- Omega-3 for Heart & Brain Health
- D3 vs D3+K2 and Is 4000 IU Safe?
- Signs of Low Zinc
- How Much Vitamin D3 and K2 Daily?
- What Is Vitamin K2 MK-7?
- Vitamin D and Bone Health
- Can Vitamin D3 Without K2 Hurt You?
- Why Is Copper Added to Zinc Supplements?
- Omega-3 and Brain Fog: An Honest Look
- Omega-3 and the Normal Vision Role
Digestion & Liver
- Best Probiotic for Women UK
- Prebiotic vs Probiotic
- Milk Thistle: Composition & Use
- What Does CFU Mean in Probiotics?
- Dandelion Root Explained
- Milk Thistle Extract: What "Standardised to 80%" Means
- The Silymarin Complex Explained
- What Part of the Milk Thistle Plant Is Used?
- What Is Inulin in a Probiotic?
Hair, Skin, Nails & Joints
- Best Vitamins for Hair, Skin & Nails UK
- Best Collagen Supplement UK
- Biotin: How Much Do You Need?
- Turmeric and Joints
- Supplements for Bones & Joints UK
- What Is Hydrolysed Collagen?
- Why Turmeric Needs Black Pepper
- What Is Piperine and What Does It Do?
- What Are Curcuminoids?
- Turmeric and Ginger: Why Combine Them?
- Collagen Powder vs Capsules
- Type I & III Collagen Explained
- Is Collagen a Vitamin?
- What Are Keratin Tablets?
- Is Biotin Water-Soluble?
- Best Time to Take Biotin 10,000 mcg
- How Much Biotin for Hair Loss?
Focus & Cognition
- Lion's Mane and Focus
- What Is a Nootropic?
- What's in Lion's Mane?
- Lion's Mane: Fruiting Body vs Mycelium
- Full-Spectrum vs Extract Lion's Mane
- When Should You Take Lion's Mane?