Tag

Immunity

Page 4 of 4

An elderly woman being pushed in a wheelchair along a bright care home corridor

The high-dose flu shot cut flu hospital admissions by 31% in French care homes, average age 88

Older immune systems respond weakly to vaccines, so one product carries four times the antigen. A nationwide French analysis matched 76,858 pairs of care home residents and found the stronger shot kept fewer of them out of hospital.

Aug 30, 2026

A bowl of plain yogurt with strawberries and blueberries on a wooden table

verdict

Probiotics: uses, evidence, dosing and safety

Probiotics have one strong result, halving antibiotic-related C. difficile diarrhea, and a long list of weaker ones. Cochrane noted probiotic-company funding in 28 of the 47 trials it pooled.

Aug 6, 2026

Halved oranges and a grapefruit packed together, cut sides up

verdict

Vitamin C: uses, evidence, dosing and safety

Vitamin C has been tested against the common cold for sixty years and the answer is still a shrug: it may shorten one slightly, and taking it once a cold has started does almost nothing.

Aug 6, 2026

Sunlight dappled through a straw hat across a face

verdict

Vitamin D: uses, evidence, dosing and safety

Vitamin D is the most-studied supplement there is, and the pattern across thirteen uses is almost always the same: correcting a deficiency helps, and adding more on top of enough does not.

Aug 6, 2026