Testosterone enanthate only

Wait What? Can we inject cypionate Subcutaneous?

Into the stomach like HCG with insulin needle?

You can but it's going to leave welts if it is ugl.. Just use an insulin syringe and inject im daily

There are testosterone formulations, such as Xyosted™, that are specifically designed for subcutaneous administration. I believe the key difference is that they do not contain solvents like benzyl benzoate or preservatives such as benzyl alcohol.

Testosterone products produced by UGLs typically have very high concentrations of benzyl benzoate and benzyl alcohol that cause problems when injected under the skin.