The first of the natural testosterone boosters is intermittent fasting. One of the biggest intermittent fasting benefits? It’s been shown to increase testosterone by nearly 200 percent or even up to 400 percent. (4) In addition, a study by the University of Virginia Medical School noted that growth hormone levels increased 2,000 percent over the baseline in men who ate no calories for 24 hours, and growth hormone levels are correlated with testosterone. (5)
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Nutritional developers formulated Nugenix® with Testofen®, a key natural ingredient to help boost “free” testosterone along with resistance training. This key ingredient is carefully extracted from the fenugreek plant. A Testofen® study in Irvine, California indicated positive free testosterone-related results. Nugenix also includes L-Citrulline Malate, Tribulus, Zinc, plus Vitamins B6 and B12 to help promote overall health and performance.*
So if you’re intent on maximizing your testosterone levels, and/or you have applied all of the above and you’re still not satisfied with your results (which would be surprising) then you could try the below. I will point out that some of these tips may not have the scientific evidence to back them up like the previous points, but I can assure you that either I have or do use them (and have positive results), or a client has used them with pleasing results, or finally it is such a new conception that there isn’t enough evidence to prove it one way or another.
This herb, used for centuries in foods, even poultices, was reported in the International Journal of Sport Nutrition and Exercise Metabolism to have reduced body fat and improved total testosterone levels versus a placebo in a double-blind trial. Fenugreek may also be helpful if you feel your sex drive is on the wane, as other research has found it can boost libido. You can get it in curries (it’s used to flavor them) and teas, or as a supplement in TestroVax, by Novex Biotech, which promises to boost testosterone levels 42% in 12 days. (novexbiotech.com)

Do low levels of testosterone produce symptoms in middle-aged men? Absolutely. In fact, the classic symptoms were first recognized more than 70 years ago when two American physicians, Carl Heller, MD, and Gordon Myers, MD, showed the effectiveness of testosterone treatment for symptoms of fatigue, depression, irritability, low sex drive, erectile dysfunction, night sweats, and hot flashes in men. Over the years, subsequent studies have found that some—but not all—men with low, age-adjusted testosterone levels exhibit symptoms consistent with andropause. All experience improvement with testosterone therapy.
Here’s a scary thought: You may be less of a man than your father was—at least hormonally. A study in the Journal of Clinical Endocrinology and Metabolism found that, on average, testosterone levels were higher in men of the same age in the ’80s than they were in the 2000s (due, researchers speculate, to higher rates of obesity and the wider use of medication these days).  
A study published in the Journal of Steroid Biochemistry studied the effects of diet on serum sex hormones in healthy men. Results showed that when men decreased their healthy fat intake, serum concentrations of androstenedione, testosterone and free testosterone also decreased. (8) This indicates you can add low testosterone to the list of low-fat diet risks.
Testosterone was first used as a clinical drug as early as 1937, but with little understanding of its mechanisms. The hormone is now widely prescribed to men whose bodies naturally produce low levels. But the levels at which testosterone deficiency become medically relevant still aren’t well understood. Normal testosterone production varies widely in men, so it’s difficult to know what levels have medical significance. The hormone’s mechanisms of action are also unclear.

A: Testosterone products can improve a male's muscle strength and create a more lean body mass. Typically, these effects are not noticed within the first two weeks of therapy, but it is possible that he is more sensitive and responds well to the therapy. Some of the other more common side effects of testosterone patches are headache, depression, rash, changes in libido, acne, male pattern baldness, and increased cholesterol levels. This is not a complete list of the side effects associated with testosterone patches. Megan Uehara, PharmD


Many studies demonstrate an improvement in mood of hypogonadal men treated with testosterone (Wang et al 1996; Azad et al 2003). The relationship between testosterone status and mood, particularly depression, remains unresolved. Using Beck’s Depression Inventory, Barrett-Connor and colleagues found that the depression score worsened as men aged, exactly at a time when testosterone levels are decreasing (Barrett-Connor et al 1999). Pope and colleagues found that testosterone treatment in men with refractory depression lowered the Hamilton Depression rating scale and the Clinical Global Impression severity rating (Pope et al 2003). The Beck Depression Inventory remained unchanged in Pope’s study.
There is also solid research indicating that if you take astaxanthin in combination with saw palmetto, you may experience significant synergistic benefits. A 2009 study published in the Journal of the International Society of Sports Nutrition found that an optimal dose of saw palmetto and astaxanthin decreased both DHT and estrogen while simultaneously increasing testosterone.6 Also, in order to block the synthesis of excess estrogen (estradiol) from testosterone there are excellent foods and plant extracts that may help to block the enzyme known as aromatase which is responsible producing estrogen. Some of these include white button mushrooms, grape seed extract and nettles.7
As blood levels of testosterone increase, this feeds back to suppress the production of gonadotrophin-releasing hormone from the hypothalamus which, in turn, suppresses production of luteinising hormone by the pituitary gland. Levels of testosterone begin to fall as a result, so negative feedback decreases and the hypothalamus resumes secretion of gonadotrophin-releasing hormone. 
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