glutathione estrogen does lower system enhancement for cardiac protection: pharmacological options against oxidative stress and ferroptosis The Impact of Estrogen Deficiency – Seeking Health DIM & I3C

While they do not cause cancer, their mechanism could theoretically support the blood supply to a tumor

That becomes the reference range

If the person appears nervous or tense, advise them to put their weight on the leg or arm that you aren't injecting to help relax the muscles

It is also banned by the World Anti-Doping Agency (WADA).

I know the syringe and the bubble moves up into the nose of the syringe

While you can supplement with a bit more than this (many supplements have 15 to 30 mg), you should not exceed the tolerable upper intake of 40 mg per day from food and supplements combined, unless supervised by a doctor