MEDIA GRADE OR RECEPTOR GRADE? (IGF-1 r3)

[Justin_Case]

Is there truly a significant difference, health wise or result wise, in the two? Prices are MUCH different. Have someone I trust (checking with mods anyway) who has receptor grade only, but quite expensive.

What should I be paying for either one anyway?

[einstein1905]

Is there truly a significant difference, health wise or result wise, in the two? Prices are MUCH different. Have someone I trust (checking with mods anyway) who has receptor grade only, but quite expensive.

What should I be paying for either one anyway?

There is absolutely no reason to use receptor grade for human (or any in vivo) use. The only time that little % purity difference would be important are in in vitro binding assays...

save your money. You also won't likely have access to receptor grade anyway