Health Optimisation: Separating Evidence From Marketing

The Problem: When Marketing Looks Like Medicine

The health optimisation industry is booming. IV vitamin drips, DNA-based supplement plans, executive health screens, gut microbiome tests, peptide therapies, red light panels \u2014 all sold with confident claims and impressive-looking science. The trouble is, most of these interventions have either weak evidence, no evidence, or evidence that doesn't support the claims being made. That doesn't mean they're all useless. But it does mean you need to be a careful consumer. The people selling these products have a financial incentive. The published research usually tells a different story.

What Actually Has Strong Evidence

The interventions with the strongest evidence for health and longevity are also the cheapest: regular exercise (150 minutes moderate or 75 minutes vigorous per week), not smoking, moderate alcohol (or none), adequate sleep (7-9 hours), a diet rich in vegetables, fruits, whole grains and fish, maintaining a healthy weight, and managing stress. This isn't exciting. It doesn't sell supplements. But the evidence is overwhelming. A 2018 study in the BMJ found that following just four of these lifestyle factors reduced the risk of early death by 66%. No supplement comes close.

Supplements: What's Worth Taking

Most people eating a balanced diet don't need supplements. The exceptions, where evidence supports routine supplementation, are: Vitamin D (especially in the UK where sun exposure is limited October-March \u2014 10-25 micrograms daily is the NHS recommendation), omega-3 fish oils (if you don't eat oily fish twice a week), folic acid (if you're pregnant or planning pregnancy), and iron (if blood tests confirm deficiency). Everything else \u2014 including the expensive multi-vitamin packs, the collagen powders, and the mushroom extracts \u2014 is either unsupported by evidence or only relevant for specific deficiencies that should be confirmed by blood tests first.

Health Screening: What's Valuable vs What's Theatre

A basic health check \u2014 blood pressure, cholesterol, blood sugar, kidney and liver function \u2014 is genuinely useful, especially over 40. The NHS Health Check programme offers this free every 5 years between ages 40-74. Executive health screens (costing \u00a3500-5,000) add tests like full-body MRI, CT calcium scoring, cancer markers, and extensive blood panels. Some of these are valuable (CT calcium scoring for heart disease risk is excellent). Others create more problems than they solve \u2014 full-body MRI frequently finds 'incidentalomas' (harmless abnormalities) that lead to anxiety, further testing, and sometimes unnecessary biopsies.

Red Flags: How to Spot Bad Science in Health Marketing

Be suspicious when you see: testimonials instead of clinical trials, 'proprietary blends' that don't disclose ingredients, claims of curing or treating diseases (supplements legally can't make these claims), before-and-after photos (meaningless without controls), references to studies that are in mice or test tubes rather than humans, and any product that claims to work for everything. Good science is specific, cautious, and acknowledges limitations. Good marketing is confident, broad, and minimises downsides. Learn to tell the difference.

A Sensible Approach to Health Optimisation

Start with the basics: blood tests to identify actual deficiencies, a realistic exercise routine you'll actually maintain, sleep hygiene improvements, and dietary changes that are sustainable long-term. If you want to go further, focus your spending on interventions with clinical evidence: a CT coronary calcium score if you're male over 40 or female over 50 with any risk factors (around \u00a3150-300 privately), a DEXA scan for bone density if you're at risk of osteoporosis, and colonoscopy screening if you have a family history of bowel cancer. These are targeted, evidence-based, and genuinely informative \u2014 unlike most of what the wellness industry is selling.