There is some good advice here and a lot of hot air.
1. Masturbation has nothing to do with reduced anything. An ejaculation is an ejaculation.
2. Watching porn has no effect on reduced testosterone. If you are addicted to porn, that's something else and there are groups to help you (Sex Addicts Anonymous; no joke)
3. Working out with weights helps a lot.
4. Long distance running can lower your testosterone if you do too much of it. So just keep an eye on your distances.
5. Zinc and Omega-3 fatty acids plus Vitamins D and C helps a lot.
6. Start massaging your penis daily. JELQUING. Get the flow of blood going into it DAILY. Like milking a cow, gently pull the blood into the blood filling chambers. If you keep this up, you will also notice harder, stronger erections.
7. Talk to hot girls. Even if you don't ask them out. Talking to them gets your testosterone production going. Plus, you'll get in the habit and it will become easier.
8. Jerk off at night before bed if you don't have a girlfriend. If you have one, screw her EVERY NIGHT. Do whatever you can to get it going.
9. If you take a supplement, don't take more than 50 mgs or you could experience side effects. And don't keep it up for more than three months.
10. Wear boxers, not briefs.
Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.
Though you may already be aware of potential side effects from testosterone abuse (note I said abuse and not use), here they are again: lowered HDL-cholesterol levels (good cholesterol), testicular atrophy, reductions in sperm count, prostate enlargement, liver damage (primarily with oral steroids that have been modified with a 17-alkyl substitution), menstrual irregularities, suppression of endogenous hormone levels (like LH and T), development of palpable breast tissue in men (also known as gynecomastia), clitoral enlargement, and acne.
This report describes a model of steroid transport in human plasma. The binding affinities of 21 endogenous steroids for both testosterone-binding globulin (TeBG) and corticosteroid-binding globulin (CBG) were determined under equilibrium conditions using a solid phase method at physiological pH and temperature. A computer program was used to solve the complex equilibrium interactions between these steroids and TeBG, CBG, and albumin. In this manner, we calculated the plasma distribution of each steroid into TeBG-bound, CBG-bound, albumin-bound, and unbound fractions in normal men, normal women during both the follicular and luteal phases of the ovarian cycle, and women during the third trimester of a normal pregnancy.