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Most routine health checkups measure only a fraction of the biomarkers that predict metabolic disease and longevity. These seven specific tests — several of which are rarely ordered in standard care — provide a comprehensive early-warning system for metabolic dysfunction, years before symptoms or diagnoses appear.

Metabolic dysfunction-associated steatotic liver disease (MASLD) — formerly called NAFLD — now affects an estimated 30% of adults worldwide and is the fastest-growing cause of liver transplant. The good news: it is one of the most reversible chronic diseases in existence when addressed with the right dietary and lifestyle interventions.

Insulin resistance is the metabolic root of type 2 diabetes, PCOS, obesity, fatty liver disease, and cardiovascular disease — yet most people with it have no idea. This guide explains what insulin resistance is, how to test for it, and the dietary and lifestyle strategies with the strongest evidence for reversing it.

Osteoporosis affects over 200 million people worldwide and causes 1 in 3 women and 1 in 5 men over 50 to suffer a fragility fracture. Despite being largely preventable, most intervention focuses on treatment rather than prevention. This guide covers the peak bone mass accumulation window, the nutrients and exercise that protect bone density across life stages, and the evidence for reversing bone loss.

Chronic constipation affects 14–20% of adults globally and has a profound impact on quality of life — yet most people address it with laxatives rather than the dietary and lifestyle changes that can resolve the underlying dysfunction. This evidence-based guide covers the most effective interventions for different types of constipation, ranked by clinical evidence.

Biological age — how old your cells actually are versus your chronological years — can now be measured through epigenetic DNA methylation patterns. These clocks predict mortality and disease risk better than almost any other biomarker, and they respond to lifestyle interventions in measurable ways. This guide explains the science, the available tests, and what you can do with the results.

Until recently, type 2 diabetes was considered a progressive, irreversible condition. Multiple landmark clinical trials have overturned this assumption, demonstrating that significant weight loss and dietary modification can produce sustained diabetes remission in a substantial proportion of patients. This guide covers what the evidence shows, the approaches that work, and what remission actually means.

Metabolic syndrome — the cluster of high blood pressure, high blood sugar, excess abdominal fat, and abnormal cholesterol — affects 35% of adults and dramatically raises cardiovascular and diabetes risk. This guide presents the evidence-based dietary and lifestyle protocol that addresses all five diagnostic criteria simultaneously and has demonstrated the most substantial reversal outcomes.

Gut dysbiosis — the disruption of normal gut microbial balance — affects the majority of adults in Western countries and contributes to everything from digestive symptoms to immune dysfunction and mental health. This guide explains how to recognize it, what causes it, and the evidence-based dietary strategy for restoring microbiome health.

Skin health is ultimately an inside job — the nutrients that build collagen, protect against UV oxidative damage, maintain the skin barrier, and modulate sebum production all come from diet. This comprehensive guide covers the dietary factors with the strongest evidence for anti-aging skin health, acne reduction, and maintaining the skin barrier that protects against premature aging.