Why do Indians need Vitamin D supplements? Low sunlight, pollution and indoor living to blame

Thirty five-year-old Manish came to me complaining of muscle pains and excessive fatigue. He had a desk job with an IT company. He was a regular exerciser, yet the muscle pains would not go away. A friend then suggested testing for vitamin D (25OHD) level, which was found to be 8 ng/ml, much lower than the recommended level of 20 ng/ml. I prescribed him vitamin D supplements. In six weeks, his pains had all but disappeared, and he was back to…