How much exactly is 500IUs?

I am doing Anthony Roberts PCT and it calls for 500IUs a day...according to my nurse friend that is a ton....50 units on a slin syringe. Is that correct?

It really depends on the amount of the Bac Water you use to mix your hcg with. Also how many units per vial example:

If you have a 10,000 unit kit of hcg mixing the hcg powder with 5ml's of the water will give you 1000 units at the 50 mark on the insulin syringe. Once you have that calculation just cut it in half to have 500 units. Ultimately 500 units will be the 25 mark on your insulin syringe.

Ok sounds good. So if I have two 5,000 unit kits can I use this formula and put it all in a vial and refridgerate it or will it die to fast mixing that much at once?

500iu's = 500iu's