Actual growth, no I beleive thats a myth. I'd have to get specially tailored pants for my quads if it were true. The only thing that may happen is an inital swelling effect. I know my tris swell after a few wks of tren, but its not permanent, its just excess oil waiting to disapate I've read that winny will actaully draw water into the site, make it appear bigger, but once you stop hitting it, its gone in a few days.