Simply Younger Journal

Sarcopenia — the progressive, age-related loss of skeletal muscle mass and strength — is one of the most consequential health challenges facing men in midlife and beyond, and one of the most underappreciated. It begins earlier than most people realise, accelerates at a pace most people don’t expect, and has implications that extend well beyond…

The gut microbiome — the ecosystem of trillions of microorganisms living in your digestive tract — has transformed from a footnote in health science to one of its most actively researched frontiers. In the past decade, research has linked the composition and diversity of the gut microbiome to immune function, metabolic health, cognitive performance, mood,…

NAD+ is a coenzyme found in every living cell. It is involved in over 500 enzymatic reactions — including the production of ATP, DNA repair, the regulation of circadian rhythms, and the activation of sirtuins (proteins that regulate cellular stress responses and longevity mechanisms). It is, in the most literal sense, one of the most…

The protein recommendations most men over 40 are following are wrong — not dangerously wrong, but meaningfully wrong in a direction that is costing them muscle, recovery, and metabolic health. The traditional guideline of 0.8 grams of protein per kilogram of body weight (about 0.36g per pound) was set as the minimum required to prevent…

Omega-3 fatty acids sit at the top of the evidence hierarchy for anti-inflammatory supplementation. With over 4,000 published studies and consistent findings across cardiovascular health, brain function, joint health, hormonal support, and biological ageing, the case for omega-3 supplementation is stronger than for almost any other compound in the wellness toolkit. Yet most men over…

Vitamin D is officially classified as a vitamin, but functionally it behaves as a hormone — one that regulates gene expression across hundreds of biological pathways, influences immune function, governs calcium metabolism, supports testosterone production, and modulates the inflammatory processes that underlie most age-related chronic disease. It is also deficient in approximately 42% of American…

The scale is one of the most misleading pieces of health technology in most people’s homes. It measures one thing — total mass — and tells you almost nothing useful about whether you’re getting healthier, fitter, or biologically younger. Two men can weigh exactly the same and have vastly different body compositions: one with 25%…

Walk into any supplement store and you’ll see two categories of amino acid products sitting next to each other: BCAAs and essential amino acids (EAAs). Most people grab the BCAAs — partly because they’ve heard of them, partly because the marketing is louder. But the science tells a clear and uncomfortable story: BCAAs alone are…