Vitamins I feel are more of a lifestyle supplement. I believe that you will notice results after a longer course --- from 9-12 months. Focus on eating 4-5smaller meals during the day instead of three or four larger ones. A large meal not only forces the body to store fat but also inhibits the flow of growth hormone in the blood stream due to higher insulin levels. A well balanced includes at least 5 fruits or vegetables a day. Some other treatments to consider include:
1) Take a good multivitamin, and be sure to get enough proteins and calcium.
2) You might consider growth hormone therapy. Level of growth hormone that are imbalanced in our body can be treated by growth hormone therapy i.e., tablets or injections. Check with your doctor!
3) Acupuncture and/or eflexology to stimulate reflexes in the muscles which can be helpful to promote growth.
4) PT limb lengthening traction (painful?)