Jacqueline Hyde (2005) on Netflix

Plot summary

Jackie is a lonely, shy telemarketer in her late twenties. A phone call tells her that her grandfather has died, and his house passes to her as his only living relative. The place holds a surprise: her relative was an inventor, and a hidden laboratory waits in the basement. There Jackie finds the formula he worked on for his whole life. A mishap in the lab leaves her swallowing some of it, and the effect lets her reshape her body however she likes: hair color, figure, even her sex drive. Freed from her old self, she takes the formula out for a night on the town and picks up a man in a bar.