I have used that lot # and was very disappointed even with 1600 mg per week. I have used test for many years and know the signs(high sex drive=24 hr. hard on) after 5 weeks I switched to QV 250 and Tornel T200 and noticed a imporvement in 2 weeks. I think they could be over filled and underdosed but more than likely someone is putting out some good fakes.