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I got HRT through my doctor in the US. They gave me a big informed consent document with lots of details and warnings. A lot of the warnings are a bit fearmongery, like you might have a higher risk of this specific cancer, based on one small study decades ago.
Despite all that, there were only two things described as irreversible changes, breast growth, and infertility.
If you’re an adult and no longer have an actively growing skeleton, and have taken precautions against the two above changes, you should be able to stop the HRT and go back if needed.
The changes are cumulative and gradual. You burn fat from everywhere, but deposit it based on your current hormones. With time fat will appear to migrate, and will migrate back if you stop the HRT.
Edit: specifying nationality is useful information when discussing supplied documentation.
no. that’s thermodynamically impossible.
though it is true that fission and fusion are opposites, you cannot gain energy by fissing and fusing the same material. There’s an inverted bell curve where medium sized elements are the lowest energy state. You can get energy by making atoms more medium, fusing the smallest atoms or fissing the biggest ones. Doing the opposite costs energy.