vitamin D through sunlight, food, or supplements. But taking more than the body needs is not always better.
The main warning is clear: high-dose vitamin D supplements can build up in the body and may cause high calcium levels, which can affect the kidneys, bones, and heart. The common upper limit for adults and older children is 100 mcg, or 4,000 IU, per day unless a healthcare professional recommends otherwise.
A smart approach is simple: check your dose, avoid combining too many supplements, do not follow random high-dose trends,
