The only person qualified to read the results of a blood panel to determine if you have low testosterone is an endocrinologist. Even general practice / PCP are known to get it wrong. The test i'm told is not something that is as black and white as the results may seem to suggest. Further, it's rather common now to see commercials for "Low-T" in order to push a pharacuetical agenda, but I digress.
The first thing I would do is schedule an endocrinologist appointment - they are specialized to work with this sort of thing. I would not trust the results interpreted by your gen practitioner for something like this. It's the same reason I go to an ENT when I get a sinus infection instead of my PCP. Your number cannot be directly compared to a 75 year old man in any case. Yes Test levels do drop with age, but it's not as significant as most would have you believe. The take home should be that your levels are your levels, they cannot be compared apples to apples to anyone else or any age group. That's what a endocrinologist will bring to the table that a gen practitioner will not.
The second thing I would do be real with yourself. Chances are that your T levels are in fact normal and fine. Can you supplement test? Sure. Just know the risks are that the possibility exists that your body stops producing its own. There are also risks of enlarged organ size, Gynecomastia, atrophy of the testicles and more. I personally don't subscribe to roid-rage, but it does have an affect on your mood. If you're already an unhappy and angry person, it could amplify that.
Lastly, you mentioned attempting to fix diet and exercise, both of which are so key to looking and feeling good. I just turned 30 myself and I'm stronger and better looking now than at 18. Never had my levels checked or anything but I feel great.
My advice as a non-medical professional is this:
Make small, gradual changes to diet and exercise. Don't try to start hitting the gym every day for 2 hours and eating everything that tastes new or bad to you. It'll never work, you will fail and hate yourself. Start slow. Hit the gym 3 times a week for 1-1.5 hours. Set specific goals (ie I want to add X lbs to my bench, I want to run this much, etc). Log your meals with something like myfitnesspal. Don't set any caloric restrictions, just log what you eat every day so you know what you want to change. This will break down your calories, sugar, protein, carbs etc so you can tailor your shopping list to whatever your goals are. If you like weight training, choose a beginner routine and stick to the program 100%, don't change anything.
It takes time to build a habit to the point where it's not work but something you look forward to. Love yourself, accept your failures, and struggle for the person you want to be tomorrow. Diet and Exercise, specifically weight training helped me more than anything to feel better and break out of my funk. If that doesn't do it for you, perhaps you could talk to mental health professional which is usually the flip side of people who believe they have low-T. Displeasure with one's self, appearance, job outlook, finance, relationships, etc are all ways to bring yourself down if they aren't up the some pristine standard you believe you have to achieve. My personal guess is that your T levels are probably fine, if you're convinced otherwise I would really talk to an endocrinologist as they are highly specialized in this field. Good luck, and if you want some tough love stop back and fill your inbox with some Sgt. Hartman-typed insults. Take care.
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