Dr. Kenneth Lin, a family physician and associate director of the Lancaster General Hospital Family Medicine Residency, recently found himself in the vitamin aisle of his local pharmacy, puzzled by the vast selection of vitamin D supplements. With doses ranging from 400 to 10,000 international units, it was clear that vitamin D remains a hot commodity. But according to the latest guidance from the U.S. Preventive Services Task Force (USPSTF), many older adults may not need it at all.
The USPSTF’s draft update, released in December 2024, advises against routine vitamin D supplementation for community-dwelling adults aged 60 and older to prevent fractures or falls. The recommendation contradicts guidance from the Endocrine Society, which in 2023 endorsed supplementation for certain groups, including older adults, pregnant individuals, and those with prediabetes.
“The basis for this ‘don’t do’ recommendation is a draft evidence synthesis that, in contrast to the findings of the Endocrine Society, determined that regardless of dose or study duration, the benefits and harms of vitamin D supplements in this population are either nonexistent or trivial, resulting in no net benefit,” Dr. Lin explained in a recent blog post.
This divergence in recommendations, Lin suggests, likely stems from differences in study selection criteria. The USPSTF focused on patients seen in primary care settings and excluded studies on nursing home residents, potentially missing benefits for individuals with dementia, frailty, or a history of osteoporotic fractures.
Despite ongoing debate, Dr. Lin remains skeptical about the widespread use of vitamin D supplements in healthy adults. “In general, I trust guidelines written by and for primary care clinicians more than those authored by subspecialists,” he said. His advice to patients? “Save your money.” Instead of spending on supplements with limited proven benefits, he encourages older adults to invest in essentials or activities that more directly promote well-being.
As the USPSTF finalises its recommendation, the discussion around vitamin D supplementation is likely to continue, highlighting the complexity of nutritional science and the evolving nature of medical guidelines.
