T Nation

How Long for Bioavailability


Hi, I'm new and I apologize if this is a stupid question. I'm 47 and recently diagnosed with low T. I'm starting TRT injections tomorrow (100mg once a week to start). From reading articles and this forum it looks like it takes about 6 to 8 weeks before you start "feeling"the effects. But, my question is does anybody know about how long it takes before the testosterone injections start helping with muscle hypertrophy? Is that also around 6 to 8 weeks? I workout about 4 to 5 days a week. Thanks.


T will be available to the muscles in days. Then they will respond in their own time. Whey shakes will help a lot and if you get a hunger that will not go away, could be protein hunger and whey shakes will make a difference.

Don’t neglect the role of muscle recovery time.

Mental effects can take weeks as there are changes to the brain then changes in thought patterns and mood.

E2 can create problems and needs to be monitored and managed as required.

Your energy will increase, but low thyroid function can hold you down.