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Preventive Medicine & Longevity Science (2026)

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An evidence-based guide to reducing chronic disease risk, extending healthspan, and understanding what truly works — beyond hype, supplements, and shortcuts. This page serves as the central hub for OneDayMD’s coverage of preventive medicine, cancer prevention, cardiometabolic health, and longevity science, grounded in epidemiology, clinical trials, and systems biology. What This Hub Covers (Quick Overview) This hub explains: What preventive medicine actually means in modern clinical science The difference between lifespan and healthspan Which interventions reduce disease risk with high-quality evidence Where longevity science is promising — and where it becomes speculation How lifestyle, medications, and emerging tools interact over decades It is designed for readers who want risk reduction, not biohacking fantasy . Executive Summary Preventive medicine focuses on reducing the probability of disease before it occurs , rather than treating pathology after it is established. Longevity ...
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Butyrate: The Ultimate Guide to Supplements, Foods & Gut Health (2026)

By Dr Frank Yap, MD
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Butyrate is a powerhouse short-chain fatty acid (SCFA) essential for gut integrity, immune balance, metabolism, and even brain health. This pillar page will guide readers through everything they need to know about butyrate — from supplements to foods, to strategies for boosting production naturally. Table of Contents What Is Butyrate? Best Butyrate Supplements Sodium & Calcium Butyrate Tributyrin Supplements Prebiotic + Butyrate Blends Clostridium butyricum Probiotics Best Foods That Increase Butyrate Naturally Resistant Starch Foods Soluble & Fermentable Fiber Polyphenol-Rich Foods Foods That Contain Butyrate Directly How to Maximise Butyrate Production Supplements vs Foods: Which Is Better? Who Benefits Most from Butyrate? Key Takeaways What Is Butyrate? Butyrate (butyric acid) is a short-chain fatty acid produced when beneficial gut bacteria ferment fiber and resistant starch. It is the main fuel for colon cells and regulates: Gut barrier integrity Immune system balance In...
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6 Best Phytonutrients Supplements: Review 2024

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Vitamins, minerals, and macronutrients like proteins, carbs, and fats are not the same as phytonutrients. They can be found in a variety of fruits, vegetables, spices, and even edible flowers.  Phytochemicals serve as pollination attractants or as defenses against pest and insect attacks and other stresses, like as ultraviolet light. Moreover, phytochemicals also contribute to color or aroma of the foods and are recognized to have potential benefits for human health and nutrition. Foods rich in phytochemicals are frequently quite colorful, but these nutrients are also rich in some white foods for example olive oil, onions, and garlic.  Phytonutrients Benefits Some of the important bioactive phytonutrients include polyphenols, terpenoids, resveratrol, flavonoids, isoflavonoids, carotenoids, limonoids, glucosinolates, phytoestrogens, phytosterols, anthocyanins, ω-3 fatty acids, and probiotics. They play specific pharmacological effects in human health such as anti-microbial...
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18 Best Supplements to Reduce Cytokine Storm: Advanced Guide

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As of May 2024, there are more than 4,000 early treatment studies  that have been published and shared with the whole world. New ones are being added every day.  This is a review of the literature, covering multiple observational studies, randomized controlled trials and references related to natural supplements and cytokine storm with more than 300 studies and references. We know that while a large percentage of the population only experiences mild to moderate symptoms of COVID-19 and won’t require hospitalization, others experience severe symptoms and complications, require hospitalization, or may even die.  It appears one of the differences between those who have a mild illness and severe illness is related to the body's ability to reduce the hyperimmune response that leads to a cytokine storm and the hyper-coagulability (tendency for blood clots) that often accompanies it. The cytokine storm may be one possible way to ex...
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Sleep, Longevity & Disease Risk: What the Evidence Really Shows (2026)

By Dr Frank Yap, MD
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Executive Summary Sleep is not a passive state — it is a biological repair system that influences metabolism, immune function, brain health, and lifespan. Large‑scale population data now show that chronic short sleep is independently associated with shorter life expectancy, rivaling smoking and obesity as a longevity risk factor. This article integrates epidemiological data, mechanistic biology, and clinical implications into a single evidence‑based framework. Why Sleep Is a Longevity Pillar Sleep regulates: Hormonal balance (insulin, cortisol, growth hormone) Immune surveillance and inflammation Brain waste clearance (glymphatic system) Cellular repair and mitochondrial function When sleep is consistently insufficient or fragmented, these systems deteriorate in parallel — accelerating biological aging. Population‑Level Evidence: Sleep and Life Expectancy County‑Level Data Across the United States A major epidemiological analysis published in Sleep Advances  (2025) examined sleep ...
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Repurposed Drugs & Systems Medicine: Measuring What Actually Changes Outcomes (2026)

By Dr Frank Yap, MD
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Repurposed drugs do not work in isolation. They work by modulating systems —metabolism, inflammation, immune signaling, mitochondrial function, and the tumor microenvironment. Systems medicine asks a different question than conventional care: Which measurable biological systems are drifting—and which interventions (lifestyle, metabolic, pharmacologic) shift them back toward resilience? That requires metrics, not narratives. The Systems Medicine Framework Systems medicine integrates three intervention layers , all guided by measurable biomarkers: Foundational physiology (metabolism, sleep, muscle, fitness) Targeted metabolic & immune modulation (nutrition, supplements, repurposed drugs) Conventional therapies when required Health metrics are the feedback loop that connects these layers. 1. Metabolic Metrics (Primary Targets of Many Repurposed Drugs) Insulin resistance is a shared vulnerability across cancer, neurodegeneration, cardiovascular disease, and aging. Key metrics: Fast...
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I-LONGEVITY Protocol: Anti Aging Guide to Help People Prevent and Reverse Aging (May 2026 Update)

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Can diet, lifestyle and anti aging supplements reverse your age? This comprehensive guide examines the latest, scientifically-backed anti-aging supplements and methods, drawing on over 1,000 references and studies. By exploring both the biological hallmarks of aging and the most promising interventions, this article aims to provide readers with practical, evidence-based insights into how to support healthy aging and potentially extend lifespan. However, search engine results for "anti-aging" are largely dominated by skin care products and beauty guides. In reality, anti-aging science goes far beyond skin deep.  In This Article: Chapter 1: Methodology Chapter 2: What is Aging? Chapter 3: Biological Age vs Chronological Age Chapter 4: Causes of Aging and Hallmarks of Aging Chapter 5: What is Cell Senescence? Chapter 6: What is Epigenetics? Chapter 7:  Diet and Lifestyle for Anti Aging Avoid Sugar and Ultra-processed Foods Mediterranean Diet and Vegetables Avoid Smoking and Alc...
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Fasting Mimicking Diet (FMD): The Complete Science Guide for 2026

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Key facts Duration: 5 consecutive days per cycle Day 1: ~1,100 kcal. Days 2–5: ~750 kcal All plant-based; no animal protein Low protein (<25g/day) is the key lever 3 monthly cycles = the trial protocol No coffee; herbal tea only Re-feeding with plant foods on Day 6 Do not do without physician review if on medications. What Is the Fasting Mimicking Diet? The fasting mimicking diet (FMD) is a precisely engineered 5-day dietary protocol designed to activate the cellular and metabolic responses of prolonged fasting — including autophagy, ketosis, reduced IGF-1, and stem cell regeneration — while allowing you to eat real food. It was developed by Dr. Valter Longo, director of the Longevity Institute at the University of Southern California, based on over two decades of research into calorie restriction, longevity pathways, and cancer biology. The distinction from ordinary calorie restriction or intermittent fasting is critical. The FMD is not simply about eating less. It is about consumi...
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10 Best NMN Supplements (2026 Review)

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On September 29, 2025, the U.S. Food and Drug Administration (FDA) reversed its previous stance and confirmed that nicotinamide mononucleotide (NMN) can be legally sold as a dietary supplement in the United States . This decision follows a period of regulatory uncertainty and effectively restores NMN's legal status as a supplement. NMN is one of the most popular supplements in the anti aging community. NMN stands for nicotinamide mononucleotide and is a precursor to NAD+, or nicotinamide adenine dinucleotide. NMN is the direct precursor of the essential molecule nicotinamide adenine dinucleotide (NAD+) and is considered a key component to increase NAD+ levels in cells. NAD+ is a critical molecule found in every cell of your body, but levels of NAD+ naturally fall with age, making it — and NMN, as a result — crucial. As per MRFR analysis , the Nicotinamide Adenine Dinucleotide Market Size was estimated at 3.51(USD Billion) in 2024. The Nicotinamide Adenine Dinucleotid...
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PicoWay vs PicoSure vs PicoPlus vs PicoCare: What are the Differences?

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If you are confused about all the pico laser treatments in town and are looking for a guide to better understand pico laser and pigmentation treatment, you've come to the right place. “Pico Laser” is a recent buzzword in aesthetic medicine, so it's no surprise that Pico Lasers are one of the most popular treatment nowadays. However, the science is also mixed with hype and you are likely to get overwhelmed and cluttered over this Pico Laser treatment. We have compiled related pico laser questions and answers in one place in order to answer the above question and to de-clutter your mind. All answers are provided by medical doctors and dermatologists. The information below is based on published answers from major sites on the internet. Here is the list: Q: I am looking for a treatment for melasma, pore size reduction and rejuvenation. I came across pico technology but what is the difference between Pico Way and Pico Sure ( apart from a manufacturer). Is one better than the...
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