11) Matthew McConaughey – Dallas Buyers Club (2013)

Matthew McConaughey followed a very strict diet for Dallas Buyers Club in which he lost more than 40 pounds to depict the AIDS patient Ron Woodroof. His diet included almost no carbs with hardly any food intake; he survived off of a few key items that gave him vital nutrients while cutting calories. It was a very intensive weight loss, and McConaughey himself admitted it was quite tiring and a pain in the neck. The diet left him severely depleted of energy and made it difficult to concentrate, but the dedication to the role was clear.
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Edited by Sangeeta Mathew