Do you microneedle? I think in my case that was a big contributor to my systemic side effect.
Any heart problems at all? Any other anti-androgenic effects? What's your experience in general?
I've used a 1.5% solution for a few weeks and was fine. Then I used a 5% solution (50mg dose) once, 2 days after microneedling, and got pretty serious side effects: dull chest discomfort (like a weight was on in), extreme brain fog, complete ED. They mostly resolved in respectively 1, 2 and 3...
I haven't had it lab tested, but I got some off AliExpress, started taking about 1mg daily orally, dissolved in water. Minimal side effects for a few days. I'll see what happens after a while.
It's not extremely expensive. I've gone through links to legitimate, verified lab supply vendors trough PubChem, and found that MXS is only about 20% more expensive than MX base.