FANCL Swelling Tight Supplement 1 Sachet (30 days) A new anti-swelling supplement that treats swelling from the inside out is now available for those who are concerned about swollen legs in the evening caused by long hours at the desk or standing in the same position! Piperine derived from long peppers reduces swelling of the legs in the evening (transient swelling that is not pathological) by approaching the problem from the inside. It also contains triple vitamins that focus on internal efficiency, which is great for working women.