Where can you get the butt injections?
Those injections are illegal in the US and in many other countries as they may cause reactions, asymmetry and other complications.
Fillers are suitable for small areas, but for larger areas only implants are a safe surgical option. There are some treatments available that combine diet, exercise and herbal supplements that are said to be effective., however, trust only those that are supervised by a doctor, not just web sites with no verifiable medical support.
Instead of injections what about working out - squats are great for the gluts