We grade our own evidence.
Including the gaps.

Vitamin D contributes to the normal function of the immune system, the maintenance of normal bones and muscle function, and normal absorption of calcium — all authorised claims.

Our position: Government advice is that everyone should consider a daily vitamin D supplement during autumn and winter, because sunlight at UK latitudes is too weak for the skin to make enough.

Magnesium contributes to a reduction of tiredness and fatigue, normal functioning of the nervous system, normal muscle function and normal psychological function — authorised claims.

Our position: We use the citrate form for its solubility; the claims attach to magnesium itself, at meaningful doses, which is why the amount is on the front of the pack.

One of the most-trialled supplements in existence — including GAIT, a large NIH-funded randomised trial. Overall results were mixed: no significant benefit over placebo for the whole study population, with exploratory signals in a subgroup with moderate-to-severe pain.

Our position: No authorised claim exists and we make none. We state the dose (1500 mg, the amount used in trials) and let you run your own n-of-1.

Curcumin is poorly absorbed on its own. The reason black pepper is in the capsule is a specific pharmacokinetic finding: piperine increased curcumin bioavailability by roughly 2,000% in a human crossover study.

Our position: Joint claims for turmeric are not authorised, so we don't make them. What we stand behind is the formulation logic — if you take curcumin at all, take it in a form your body can absorb.

Tart Montmorency cherries naturally contain melatonin. In a placebo-controlled crossover trial, tart cherry concentrate raised urinary melatonin and modestly improved total sleep time and sleep efficiency in healthy adults.

Our position: The trials are small and the effects are modest — minutes, not hours. Worth having before bed, but you should know the size of the effect you're buying.

The authorised claims — reduction of tiredness and fatigue, normal nervous-system and psychological function — are the basis for magnesium's place in the evening slot.

Our position: Direct evidence that magnesium improves sleep in people who aren't deficient is limited and mixed. “Magnesium fixes sleep” is internet folklore we won't repeat.

Randomised, placebo-controlled trials of collagen peptides at 2.5–10 g daily have reported measurable improvements in skin elasticity in women over 35 after 4–8 weeks. No claim is authorised, so we describe the studies rather than promise the mirror.

Our position: Our powder supplies 10,000 mg — the top of the studied range — because an under-dosed collagen product is a flavoured drink.

Vitamin C contributes to normal collagen formation for the normal function of skin, cartilage, bones, gums and teeth — an authorised claim, and the reason the protocol pairs your collagen with your morning vitamin C.

Our position: This is our only deliberate stack — one authorised mechanism, two products, stated plainly.

The carotenoids your macula is made of. In AREDS2 — a large randomised trial run by the US National Eye Institute — lutein and zeaxanthin were studied as part of a formulation in people with age-related macular degeneration, where they proved a safer substitute for beta-carotene.

Our position: Evidence in a specific clinical population, not a general “eye health” promise — and no claim is authorised for the general population.

DHA contributes to maintenance of normal brain function and normal vision at 250 mg per day — authorised claims with a stated threshold.

Our position: A capsule with 60 mg of DHA can't honestly carry a brain claim. Ours print the per-capsule DHA so you can do the arithmetic yourself.

Gut microbiome science is real and moving fast — but benefits are strain-specific and most general “gut health” marketing outruns the data. UK rules treat the word “probiotic” itself as an implied health claim, which is why our labels say live cultures and state the strains and count instead.

Our position: We tell you the strains, the count at end of shelf life, and stop there.

Vitamin C and zinc each contribute to the normal function of the immune system, and vitamin C additionally to the reduction of tiredness and fatigue — authorised claims and the backbone of the Immunity module.

Our position: What we won't say: that anything in this range prevents colds or flu. Immune function support is the authorised claim; prevention is not.