It is a KNOWN fact that vegans have LOW testosterne levels and a HIGHER concentration of Sex-Hormone-Binding Globulin (SHBG)
Hormones and Diet: Part Two: Testosterone
To raise your test levels eat LOTS of fish and throw in a JUICY steak now and then.
"So the consumption of meat raises T levels while a vegetarian diet lowers T levels. Another issue in regards to vegetarians could be that soy is often included as a source of protein on a vegetarian diet. But research shows that soy can lower T levels (Di Pasquale, p.44; see also my article Soy: Health Food or Food to Avoid?).
However, even the inclusion of dairy and eggs would not correct the problem. "Dutch research shows that athletes had higher testosterone levels when eating meat-based protein, compared with other sources, such as dairy and eggs" (Thorton, p.155). So even an ovo-lacto-vegetarian diet would not be good for T levels.
And this shows that it is not the fat and cholesterol in meat that raises T levels as these are found in dairy and eggs. It has something to do with meat itself. And it should be noted that "meat" is usually used in a general sense to refer to red meat, poultry, and fish. So it is not necessary to consume a diet high in saturated fat and cholesterol. A diet rich in healthy fats and lean meats would provide the T raising effects just as well as one high fatty meats and thus high in saturated fat and cholesterol.
Moreover, "… the omega-3s can provide an excellent hedge against worries about cholesterol. Blood pressure, clotting, immune response, insulin resistance, and triglyceride levels are all positively affected. Even in cases where dietary cholesterol is increased, omega-3s may aid in actually lowering cholesterol." And, "… factors that can decrease the tendency of LDL ["bad" cholesterol] to oxidize (such as the use of monounsaturated and marine oils) can negate any harmful effects a higher-[saturated] fat diet may have on CVD [cardio-vascular disease]" (Di Pasquale, pp. 82, 91).
So even if more saturated fat and cholesterol are consumed, if the above recommendation to consume foods high in MUFAs and Omega-3s is followed, then possible negative effects would be negated. A copious consumption of veggies (as was recommended in Part One) would further help to negate any possible deleterious effects.
And with the inclusion of healthy fats and veggies, a meat-based, omnivore diet would be healthier than a vegetarian diet as it would enhance and optimize hormones, rather than having a deleterious effects on hormones like a vegetarian diet does.
It is for these reasons that Men’s Health magazine declared, "In fact, many of the classic dietary commandments-restrict your overall calories, eat a lot of roughage, avoid animal flesh-are a virtual recipe for lowering T." And "Perhaps the ideal diet to drop your testosterone is high fiber and vegetarian-and the ideal way to raise it is the red-meat approach" (Thorton, p.154).
Another problem with a vegetarian diet is that it lowers IGF-1 levels (Di Pasquale, p.44). Vegetarian diets are also inevitably low in protein and usually high in carbs, which would lead to depressed GH levels."