Supplements & Nootropics
Spermidine Supplements: Ageing Signal, Not Proof Yet
Spermidine has plausible ageing biology and early human signals, but trials do not yet prove benefits for memory, heart health, or lifespan.
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Theo Marsh
Supplements and nootropics analyst covering research-backed compounds for brain health.
Supplements & Nootropics
Iron supplements for fatigue: when treatment can help
Iron may ease fatigue when deficiency is confirmed. Learn what the trials show, why product doses differ, and which safety questions deserve review.
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Supplements & Nootropics
Melatonin gummies: why label accuracy is a safety issue
Melatonin gummy labels can differ from measured contents. We examine the evidence, UK prescription rules, medicine interactions, and household safety.
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Supplements & Nootropics
Vitamin B6 supplements: when extra can harm the nerves
Vitamin B6 is essential, but extra intake can damage nerves. We examine dose limits, supplement forms, uncertain benefits, and when symptoms need review.
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Supplements & Nootropics
Supplement seals: what third-party testing really tells you
Third-party supplement seals can help with identity and contamination checks, but they do not prove a product works or makes it right for you.
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Supplements & Nootropics
Lutein and zeaxanthin: evidence, limits, and no shortcut
Lutein and zeaxanthin may support selective retinal pathways, but evidence is limited; outcomes depend on dose, formulation, and matching use to trial context.
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Supplements & Nootropics
Ginkgo for memory: what the evidence still cannot prove
Ginkgo is widely sold for memory, but evidence is weak or mixed. If using it, check medication interactions first and do not replace clinical care.
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Supplements & Nootropics
Magnesium Supplements for Sleep: Modest Signal, Real Risks
Magnesium may help some people with insomnia, but trial evidence is thin. Dose, kidney function and the distinction between food and pills matter.
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Supplements & Nootropics
Beta-Alanine Has a Narrow Benefit, Not a Gym Essential
Beta-alanine may help repeated hard efforts, but benefits are narrow; tingling is not a quality signal, and long-term safety remains uncertain.
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Supplements & Nootropics
Lion’s Mane Supplements: Brain Signal, Product Gaps
Lion's mane has small human studies behind its brain claims, but dose, extract type, and product testing matter more than the marketing suggests.
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