It’s kind of confusing but here’s what I do:
2ml bac water into 5000ui of hCG
This means every 10units on the syringe is 250iu of hcg.
Draw 20 units into syringe for a 500iu dose.
My dosage is 20units = 500 iu of HCG every 3 1/2 days
I use a insulin pin and inject sub Q in belly fat area.
Hope this helps.