Daily fibre intake linked to lower all-cause mortality and a healthier .
A Lancet-commissioned meta-analysis of 185 observational studies and 58 clinical trials found that people eating 25–29 g of fibre per day had 15–30% lower rates of all-cause mortality, cardiovascular disease, type 2 diabetes and colorectal cancer.
What the researchers did
Reynolds and colleagues, funded by the WHO, systematically reviewed four decades of fibre research to inform dietary guidelines on carbohydrate quality.
The key finding
The dose–response was linear well past 29 g/day: risk kept dropping up to at least 40 g. Whole-grain, legume and fruit fibres — not fibre powders — drove the effect. Most adults eat under 20 g/day.
Why it matters
Fibre feeds the , which produces short-chain fatty acids that regulate inflammation, glucose, appetite and mood. It is the most underrated cardiometabolic lever in modern diets.
Target 30 g of fibre a day from whole foods: beans, oats, berries, veg, whole grains. Ramp up slowly to avoid GI distress.
- 1.6–2.2Daily protein intake that maximises hypertrophy.
- 7–9Nightly sleep for recovery, hormones and growth hormone release.
- 8,000Daily step count where all-cause mortality risk levels off — largely a NEAT effect.
- 3–5Creatine monohydrate dose — no loading needed.
- 3–6Pre-training caffeine dose that reliably improves strength and endurance output.
- 10–20Hard working sets per muscle per week for hypertrophy.