For height gain, lifts. Glucosamine supplements and yoga can help with sitting height. Anything else is decades away.
For size gain, bulk up with supplements (protein, weight gainer powders) and hit the weights 3-5 times per week, focusing on one muscle group per one hour session. Max out with heavy weights then drop down; this way you gain size, not just strength. Eat proteins like chicken with veggies and rice. Some
good advice for quick visual gains.
For a change in perspective, traveling to areas with lower height averages.
For self acceptance, therapy.
