From supplements with no evidence base to diagnostic tests that create anxiety without action, the wellness industry has made a fortune out of our collective health anxiety. But it is not all cynical, and the question of where evidence ends and exploitation begins is harder to answer than critics suggest.
The scale of the machine
The global wellness industry was valued at approximately $5.6 trillion in 2022 by the Global Wellness Institute, making it larger than the global pharmaceutical market. In the UK alone, consumer spending on wellness products and services (supplements, fitness apps, wearables, functional foods, alternative therapies, and retreat experiences) is estimated to exceed £24 billion annually. These are extraordinary numbers for an industry that, at its core, sells a concept: the idea that optimal health is both achievable and perpetually out of reach.
Wellness, as a cultural phenomenon, emerged from a legitimate response to conventional medicine’s limitations. The biomedical model, focused on disease diagnosis and pharmacological intervention, left a gap that patients, particularly women, experienced acutely: a sense of not feeling well that fell short of clinical thresholds, but that was nonetheless real, persistent, and debilitating. Wellness filled that gap. The question is whether it did so with integrity.
The supplement problem
The UK supplement market is worth an estimated £442 million annually. Vitamins, minerals, herbal preparations, and more exotic formulations (lion’s mane mushroom, berberine, NAD+ precursors, collagen peptides) are sold on shelves and platforms with minimal regulatory scrutiny. Unlike pharmaceutical drugs, food supplements in the UK do not require proof of efficacy before they can be sold. They must be safe. They need not work.
A 2022 review by the Medicines and Healthcare products Regulatory Agency (MHRA) found that a significant proportion of supplements sold in the UK made health claims that were not substantiated by clinical evidence. A sweeping Cochrane review of antioxidant supplements, once among the most popular wellness products globally, found not only no mortality benefit in healthy populations, but some evidence that high-dose supplementation with vitamins A, E, and beta-carotene was associated with increased all-cause mortality.
This does not mean supplements are without value. Vitamin D supplementation has robust evidence for deficiency correction in a UK population with limited sun exposure. Omega-3 fatty acids have genuine cardiovascular evidence. Iron, folate, and B12 supplementation in relevant deficiency states are medically validated. The problem is not the category; it is the conflation of evidence-based supplementation with speculative, aspirational, or frankly implausible product claims sold to an anxious public at substantial margins.
‘Wellness sold us the idea that the body is a project to be optimised. The deeper question is who profits from keeping us permanently dissatisfied with our current state.’
The diagnostic-anxiety complex
Perhaps more troubling than ineffective supplements is the growing market in diagnostic testing outside clinical oversight. Private companies now offer consumers comprehensive blood panels, gut microbiome sequencing, genetic health profiles, hormone mapping, and continuous glucose monitoring, without the clinical framework to interpret results meaningfully or act on them appropriately.
The problem is not the tests themselves, many of which use legitimate technology. It is the absence of context. Normal laboratory ranges are population-based averages, and individual results that fall outside them do not automatically indicate pathology. Gut microbiome composition varies enormously between healthy individuals, and the science of what constitutes an ‘optimal’ microbiome remains in its early stages, despite the confident claims of numerous commercial testing companies.
Continuous glucose monitoring, designed for diabetic management, has been enthusiastically adopted by the wellness market, with users interpreting transient post-meal glucose spikes as evidence of insulin dysfunction and adjusting diets accordingly. Endocrinologists have raised consistent concerns that this approach generates health anxiety around normal physiological responses, and may prompt unnecessary dietary restriction.
The mental health cost of wellness culture
A body of research is accumulating around the psychological costs of wellness culture, particularly for younger women. Studies linking social media wellness content to increased rates of orthorexia (an unhealthy fixation on healthy eating), exercise obsession, and health anxiety are now numerous. The 2023 Surgeon General’s Advisory on Social Media and Youth Mental Health cited wellness influencer content as a specific category of concern, noting its capacity to normalise disordered relationships with food and exercise under the guise of health optimisation.
The concept of ‘clean living’ (which, despite its innocuous framing, carries heavy moral coding) has been shown in multiple psychological studies to correlate with higher rates of disordered eating and self-surveillance. The wellness industry’s tendency to attribute poor health to individual behavioural choices rather than systemic factors (access to nutrition, working conditions, environmental exposure) also functions to shift responsibility for illness from structures to individuals, with consequences that are both psychologically harmful and politically convenient.
What is actually evidence-based
The uncomfortable truth for wellness critics is that many of the practices the industry has commercialised (mindfulness, yoga, walking in nature, community, dietary fibre intake, sleep prioritisation) have genuine scientific support. The error is not in the practices but in their marketing: the creation of premium product ecosystems around activities that are, at their core, free or near-free.
Sleep hygiene, regular movement, social connection, stress management, and dietary diversity remain the most consistently supported health interventions in the epidemiological literature. None of these require a subscription. The wellness industry’s great sleight of hand is to take what is essentially ancient and simple (rest, movement, connection, whole food) and sell it back to us at a price that excludes the people who need it most.
A more honest conversation
What might a more rigorous, more equitable approach to wellness look like? It would begin with honesty about evidence: clear labelling of what products and practices have clinical backing, and what is aspiration dressed as science. It would engage critically with the structural determinants of health (housing, income, air quality, working conditions) that no supplement can address. And it would resist the cultural tendency to frame health as individual responsibility while ignoring the systemic conditions that make healthy choices possible or impossible.
None of this means the wellness industry is without value. People who feel better when they use a particular product or practice are not simply deluded. The placebo effect is a real biological phenomenon. Agency over one’s health, the sense of doing something meaningful, has documented psychological benefits independent of the specific intervention. The problem is not wellness. It is the parts of the wellness industry that knowingly exploit our fears for profit, and the collective reluctance to name that for what it is.