Adults over 65 are the largest consumers of dietary supplements — and face the highest risk of adverse effects. Age-related changes in metabolism, kidney function, and medication use make supplement safety especially important.
Vitamin K directly affects warfarin (Coumadin) effectiveness. Consistency matters more than avoidance — but any changes should be discussed with your doctor.
Older adults may use both calcium and iron supplements. Calcium may interfere with iron absorption, so ask a doctor or pharmacist whether taking them at different times of day fits the full medication and supplement schedule.
Many seniors take high-dose vitamin D for bone health. Excess can cause hypercalcemia, worsened by calcium supplements. Current adult reference limits vary by region and life stage (4,000 IU/day US/EU; 2,000 IU/day in China's WS/T 578.4—2018).
Seniors often take a multivitamin plus individual supplements. This can lead to double-dosing zinc, iron, vitamin A, or other nutrients without realizing it.
Enter all your supplements to detect interactions, duplicates, and dosage issues.