Matthew McConaughey Weight Loss -- Reduced to Skin & Bones

Looking even more emaciated and gaunt than before, a frail Matthew McConaughey was barely recognizable as he -- with the help of his mother Kay -- left a church in Austin this weekend.

As TMZ previously reported, the normally buff and shirtless 42-year-old is wasting away to play Ron Woodruff in the movie "The Dallas Buyer's Club," the true story of a man who contracted HIV through drug use in the '80s and has to smuggle life-saving medications from Mexico.