Hi!
There are many tablets available in the market, but they’re not effective and have lots of serious side effects. Also, breast size depends on genetics, body weight and hormones.
Take high protein food and healthy fats , start regular chest exercises or yoga , these will add good weight if you’re underweight.
Practically , there are limited ways to increase breast size and that is through cosmetic enhancements by surgical options.
Next Steps
Consult a female doctor to help with treatment options
Health Tips
Do not take any medication or supplement without expert advice or prescription