Your Skin Is a Readout, Not a Surface # Up to 80% of visible facial aging is attributable to sun exposure rather than to the passage of time. Which means the multi-billion-pound industry treating the surface is largely working downstream of two things: ultraviolet light, and what’s happening inside your body. Skin is rebuilt continuously, from materials you supply # Your skin is not a static covering. Collagen and elastin are synthesised and degraded daily, and the raw materials come from diet while the rate of degradation is set by inflammation, oxidative stress, glycation and cortisol.
One Meal a Day Works Because You Eat Less # When 139 people with obesity were randomised to a strict eating window or plain calorie restriction for a year, the window added nothing measurable. Not to weight, not to body fat, not to metabolic markers. The fasting wasn’t doing the work. The calorie deficit was. What the controlled trials actually found # One Meal A Day means roughly 23 hours without food and everything consumed inside one hour. It sits at the far end of a dial that runs from constant grazing to maximal fasting, and its appeal is real: low insulin for most of the day, no calorie counting, and a lot of reclaimed time.
Your Arteries Stiffen From Ordinary Days # Three hours of uninterrupted sitting measurably reduces your leg arteries’ ability to widen. Twice-daily antiseptic mouthwash raises systolic pressure by 2–3 mmHg within a week. Neither feels like a health decision. Both are. Why stiffness is the variable to watch # Arterial stiffness tracks with heart attack, stroke, kidney disease, and dementia risk. It’s not an abstraction — advanced calcification is visible on imaging as mineral deposited in vessel walls, sitting alongside bone in the same picture.
No Vegetable Unclogs Anything # Nothing you eat clears an artery the way a plumber clears a drain. But three categories of vegetable, eaten consistently for years, measurably slow arterial ageing, keep existing plaque more stable, and lower blood pressure in controlled trials. That’s a smaller claim and a far better supported one. Third: cruciferous vegetables # Broccoli, cauliflower, cabbage, kale, Brussels sprouts. People eating these regularly show less calcification and hardening in artery walls — the kind visible on an X-ray as faint parallel lines tracking a vessel, and conspicuously absent in people with healthy arteries.
Your Colon Keeps a Two-Week Memory # We talk about cancer risk in decades — smoking for twenty years, then lung cancer. The bowel doesn’t work on that timescale. Its cancer-risk markers move in days, in whichever direction you feed them. The reversibility is the finding # The demonstration is O’Keefe et al. (2015, Nature Communications): 20 African Americans and 20 rural South Africans swapped diets for fourteen days, with colonoscopies before and after. Inflammation, the rate of cell division in the bowel lining, microbiome composition, and butyrate levels all shifted — improving in the group moving to a high-fibre diet, deteriorating in the group moving to a Western one.
Protein Is the Most Underrated Drug You Already Own # The official recommendation is 0.8 g per kilogram. The evidence for maintaining muscle through middle and later life points to roughly double that. That gap — between a floor designed to prevent deficiency and a target designed to preserve function — is one of the largest in everyday nutrition. What actually ends independence # The version of ageing people plan for is cancer or dementia. The version that arrives is quieter: no longer carrying shopping, no longer rising from a low chair unaided, no longer trusting yourself on stairs.
The Starch That Feeds Your Bacteria Instead of You # In a randomised crossover trial, 40 g a day of resistant starch for eight weeks produced a mean weight loss of 2.8 kg — with no calorie restriction, against an energy-matched control starch. The mechanism wasn’t willpower. It was a change in which bacteria were living in the participants’ colons. The fat that actually matters # Visceral fat sits behind the abdominal wall, packed around the liver, pancreas and intestines. Unlike the subcutaneous fat you can pinch, it’s metabolically active — continuously releasing inflammatory signalling into portal circulation. It carries substantially higher risk of cardiovascular disease, type 2 diabetes, several cancers and cognitive decline.
Creatine Is a Multiplier, Not a Source # Across 22 randomised trials in older adults, creatine plus resistance training added about 1.37 kg of lean tissue over training alone. That’s a real effect and a small one — and it’s zero if you aren’t lifting anything. What it actually is # Creatine is a compound your body already makes, mostly in the liver, and tops up from meat and fish. Plants contain virtually none, so vegetarians and vegans run lower stores and often notice supplementation more. The supplement itself is synthesised, so it’s vegan-suitable.
