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India levies various duties on imported nutritional supplements, ranging from as low as 10% up to 150% on some products, under the authority of the Central Board of Excise and Customs.
As noted, you may not be charged for small amounts intended for personal use, along with your belongings as you return from studies abroad. But, as you may also know, with a significant market in India for such products, you may owe duty, the very reason that web sites such as myprotein has estimates of customs and import duties.