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question from a user

• 2y ago Is there a way to estimate peak testosterone by dosage and 7 day trough numbers ? Do levels linearly decline from the peak after the shot until the next shot ?

AlphaMD's Answer

For the average man, 1mg of testosterone cypionate translates to approximately 5-6 ng/dL of total testosterone. This means that 100mg/wk should get most men to a level of 500-600 ng/dL, and 200mg/wk would get them to 1000-1200 ng/dL of total testosterone. There is no way to estimate free testosterone levels based on dosage alone due to SHBG and albumin levels varying widely based on factors such as diet, alcohol use, exercise, etc.

The half life of testosterone cypionate is 8 days. This means 8 days later, the level of active testosterone is half of what it was. So the math is fairly simple, if you had a shot of 200mg once weekly and you convert that to 1000 ng/dL, 8 days later it would leave the average man with an estimated total T of around 500 ng/dL. 1 week later, without another shot, the level would be 250 ng/dL.

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