Alright, so I am 25, and I just got my blood work back and my test is at 301 on a scale of 250-1000, Free test was 29, which is about 15 points lower than the minimum for that test. I am definitely an ectomorph (though at one point in my life I was 100 lbs overweight because of anti-depressants and a poor diet, and I was sedentary). Anyways, now i have been training for three years, and have gained about 25 lbs of muscle, and I look very athletic, I fill out a large tshirt. I am 5'9 and 175 lbs. My question is: How on earth do I even have muscle mass with test/free test that low? I gain weight VERY slowly, maybe 7 or 8 lbs of muscle a year, no matter how much I eat, and I eat a LOT of food, macros are in check. Does anyone have any ideas? I am taking a natty test booster just to see if it will bring that number up any, since it's so low. Oh, and libido is great, I wake up ready to go, almost every day... so I almost think that I am just being paranoid about the number. Think I should just go to the doc to see if they can get it up to 500-700 ish?