The new Mexi-Vet Cyp is supposed to be pretty good also, but I have never tried it. I used Ttokyo's and got good results. Both are 200mg/ml. Ttokyo's is just called test cyp 200 LA, and Loeffler's is called cypriotest LA and its 250mg/ml. I don't know what Mexi-vets is called. later