Well its really a tough call. I found one site that has a supplement that may help. I heard this Growth-Flex V Pro product can help. I spoke to someone who took it and they said it took a bit of time but it helped them to gain height over time effectively as well as increase their jumping ability. Former NBA baller Grant Long endorses it

I Grow Tall Safely | Natural Growing Taller Height Booster Supplements :: Grow Taller & Increase Your Height Faster & Safely !