Does high alkaline phosphatase indicate than i am growing?

I doubt it: At age 38? I'd hope not -- you don't want to shop for new clothes. Many folks spike their alk phos after eating, so often it means nothing. If it's real, and it's more than a wee bit above reference range, it may mean anything from pregnancy to space-occupying lesions of the liver to subtle paget's of the bone (very common), but it almost never worth working up by itself.