what happens to fat cells.
When we lose or gain weight, our fat cells don’t vanish, they just get contracts and expands. They get a contract when the fat contents of the fat cells are used for making energy and expand again when the fat contents are restored. The waste product (mainly co2 and water ) is left when the contents of the fat from fat cells are used for generating energy for the body. Then are thrown out of the body by breathing, sweating, and urination.