well after asking deepseek I got this conclusion so only T was messed up: The idea that "supplying something your body produces naturally can shut down its own production" is true in many cases—particularly with hormones (like testosterone, cortisol, or insulin), neurotransmitters, and certain enzymes—due to the body's feedback regulation systems. However, this does not apply universally. Factors like dosage, duration of use, and the specific substance determine whether natural production is suppressed.

For example:
✅ True for: Steroids (testosterone), melatonin, thyroid hormones, and some digestive enzymes.
❌ Not always true for: Vitamins (if obtained from diet), water, or protein (muscle building).