Hello,
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Your research is correct but that applies only when the exogenous sources are removed, here is why.
Let us take one lab at a time:
If you are consuming Vitamin B12 on a daily basis it is supposed to show up on your blood work. Other causes for elevated B12 (it is borderline elevated, normal is < 1000) is myeloproliferative disorders like bone marrow issues or multiple myeloma, for that one will have other abnormalities like low blood cells, abnormal kidney function test, or elevated proteins. Do you have any of those?
Similarly, if you are consuming Testosterone it will appear as well. Others could be tumors from the adrenal gland, very less likely ovary and in a male testicular mass. If you see there is a pattern to your blood work, the exogenous testosterone (elevation) is causing suppression of the DHEA (adrenal androgen) therefore I am a little satisfied here that this is less likely to be a tumor producing it.
DHEA-S is a hormone secreted by adrenals and ovaries. Yours is suppressed either by exogenous or endogenous causes. It is hard to say unless the source has been removed (oral testosterone) but seems most likely to be exogenous.
Now coming to Vitamin D, how long have you been taking vitamin D and how much? This is a very high level. I would highly recommend discontinuing all Vitamin D containing products immediately, otherwise, you would have severe toxicity. There is no antidote required. The body compensates unless your calcium is high or you have signs of hypercalcemia i.e elevated calcium (like excessive thirst, panic attacks, abdominal pain). Do you know what was your calcium and albumin when was it done?
Please let me know if you have any questions or concerns. I am still not sure though as to why you are taking so many hormones, which medical condition is your doctor treating?