Hello, I am a 25 year old Caucasian male weighing 145lbs...
I have a hell of a time putting on muscle mass...have maybe 20 chest hairs...and can barely grow a beard. Am I just a terrible example of a man? or is it possible I am deficient in testosterone?
TIA
Like others have said, I'd get your labs done. No one can evaluate your test levels through a post on a forum. I'm around your age, and I can't grow a full beard either. It's genetics bro, it's not test (at least for the facial hair). My father, grandfather, etc couldn't grow a full beard until they were in their early-mid 30's.
More than likely, I think you need to evaluate your diet. You gotta eat to gain bro. Try upping your calorie count, and check out your protein intake. I'll give you an idea of my calorie intake.
Height: 6'3
Weight: 205-208
Calories: 2200+/-
Fat g: 55-100
Carb g: 150-300 (or less, often less)
Protein: 233+/- (depending on what's going on, I always get at least 1g per lbs of bodyweight) During a gain, I'm eating 1.5g+ per lbs of body weight (not lean body mass).
My mate is 6'3, and 165 lbs. He is dirty gaining (eating 5000+ calories a day) just to gain an ounce at a time. You may have a similar metabolism. I'd evaluate your diet heavily before you assume it's a testosterone issue. Body building is 80% diet. Of course, I mean this will all due respect, if you're eating well and not gaining, you may have some kind of issue.
Cheers,
Kas