Tesa and HGH have beneficial effects when it comes to your body composition, but you need to go in understanding how they work. They will make you retain water. Potentially a lot. This will impact your scale weight.
They do encourage lipolysis, though, and general improved body composition. Most people can drop the water weight quickly once they come off, and if you're not retaining a ton of water and increasing your BP or getting edema, then there's also not really any health concerns with the water weight either. The bigger issue for health, IMO, is their impact on insulin sensitivity and blood glucose.
If you have a hard time dropping water weight and are really concerned about the number on the scale dropping more than your overall body composition, then avoid them. Some people use dandelion root extract to help drop the water weight, since it has a diuretic effect.