ভিটামিন ইভিটামিন কে
ভিটামিন এ (Assamese)
ভিটামিন এ (Assamese)
1. Vitamin A is a fat-soluble vitamin that is an essential nutrient. The term "vitamin A" encompasses a group of chemically related organic compounds that includes retinol, retinyl esters, and several provitamin... from wikipedia.org