Tampons that could cost as little as 30 cents each can change color when they detect a urinary tract infection
Scientists in India have treated cotton fibers with amino acids that break down in the presence of a yeast infection
Added to tampons and pads, the fibers turn bright pink when exposed to a UTI
The color-changing tampons could cost as little as 30 cents each
Researchers are working to find an acid that produces a more vivid color