HIIT cut fat and held muscle in older adults, but the edge was small
In a 6-month trial of more than 120 healthy older adults, high-intensity interval training reduced fat while holding onto muscle, unlike moderate exercise, which shaved a little. The authors say the differences between intensities were small.
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Calcium and vitamin D supplements do little to prevent fractures or falls
A review of 69 randomized trials and more than 150,000 people found that for healthy older adults, calcium, vitamin D, or both together did little to prevent fractures or falls.
Jul 17, 2026
Semaglutide slowed measures of biological aging in a small trial
Researchers reanalyzed a 32-week trial of semaglutide in 84 adults and found the drug slowed several DNA-based clocks of biological aging. The aging analysis was exploratory, and the group studied was specific.
Jul 17, 2026
Higher blood vitamin C is linked to more gray matter in older adults
In 2,044 older adults in Japan, those with lower vitamin C in their blood tended to have less gray matter and weaker connections in a key brain network. It is a snapshot, so it cannot show that vitamin C protects the brain.
Jul 17, 2026
Calcium and vitamin D supplements do little to prevent fractures or falls
A review of 69 randomized trials and more than 150,000 people found that for healthy older adults, calcium, vitamin D, or both together did little to prevent fractures or falls.
Jul 17, 2026
In a small trial, low-dose creatine improved reaction time in menopausal women
Researchers ran one of the first randomized trials of creatine in women going through menopause. At a modest daily dose, the supplement edged out a placebo on reaction time, brain creatine and cholesterol, though the study was small and lasted only eight weeks.
Jul 16, 2026