For how we live.
Higher whole-grain intake is consistently linked to lower rates of heart disease, cancer and early death, with benefit rising up to about seven servings a day. Refined grains show no such signal.
A randomised trial found the Portfolio diet cut LDL cholesterol by about 13%, and a large cohort study links closer adherence to lower cardiovascular risk. Its authors' industry funding belongs in the record.
The trend treats the gut as a dashboard to be tuned with home tests, probiotics and 'gut-healing' protocols. The one intervention with the broadest evidence is the least sold: fibre.
A meta-analysis of 30 randomised trials found fibre supplements work in IBS, with the benefit concentrated in psyllium. Wheat bran was the most-studied type and did not carry the effect.
A Lancet series covering 135 million person-years found the largest risk reductions in that range. Trials of isolated fibre supplements produce much smaller effects on much narrower outcomes.