I too have a low T result of 400 in a range of 300-1080. I noticed feeling sluggish around the time I made a major diet change and in that diet change I dropped carbs and also dropped fats. I am coming to think that my low T is the result of the fat Percentage in my diet going from 20-22% down to 15%, some may thing I am crazy for this but in that time I was taking Clen/T3 and Adderall/Ritalin.

I started to get real weak, tired, lack of libido, the amount of weight I was lifted dropped considerably so I dropped the T3 because I thought it was my thyroid, i then dropped the clen, I then dropped the adhd meds, still felt tired and gained something like 20 lbs in 2 months. Lastly I was fighting to get my HR up to snuff during weight training, so I had BW done and it came back that my thyroid was fine, so I then had them check my Test levels and I got this score back. In the last week I added more fat back into my diet and now my HR during workouts have gone back up to a normal range, I can somewhat do cardio but after a day or two of cardio for a hour I feel drained the next day, I have just started to feel better as I have upped my fats, the last 2 days I have been eating like ass but actually feel more energized.

Do you think that the Test levels are low because the change of diet or that the adhd drugs could have effected it? I want to do cycles and hgh in the future and prefer to not go on TRT cause I heard it's bad if you ever want to have kids and have a normal life.

Please advise......also do note that I haven't felt like this my whole life, just felt really bad in the last 2-3 months since I started Clen/T3/ADHD meds and switched my diet to a very heavy carb and fat cut from what it was previously.