Theo Marsh

Collagen peptides may modestly help joint pain, but product type, study quality, allergy risk, supplement safety, and realistic expectations matter.

Psyllium has evidence for constipation and modest LDL shifts, but it needs enough fluid, medication caution, and realistic expectations about benefits.

Collagen supplements may modestly affect skin hydration and elasticity, but the evidence is product-specific, industry-influenced, and far from the anti-ageing claims marketed online.

CoQ10 has plausible biology and limited clinical signals, but evidence for statin muscle pain is mixed and medication interactions deserve caution.

Vitamin D matters for bone and deficiency, but routine high-dose supplements are not a proven longevity strategy and can cause harm in excess.

Magnesium may help some poor sleepers, but trials are small and product-specific. Safety, kidney function, and medicine interactions still matter.

Berberine may modestly lower glucose in type 2 diabetes, but supplement quality, medicine interactions, and pregnancy risks keep the case cautious.

Creatine is more than a gym supplement, but cognition and longevity claims need careful reading. Here is what the evidence supports, and where it thins.

EPA and DHA are not interchangeable. Here is where omega-3 food, supplements, prescriptions, dose, quality, and safety evidence actually differ.

A cautious look at five supplements with ageing-relevant evidence, plus the quality-control gaps and medication risks readers should understand clearly.