The confusion is understandable, as one in-vitro study noted that high doses of zinc blocked the enzyme 5-a reductase inside test-tubes. But the studies that don’t see much daylight actually show that oral zinc supplementation on actual living, breathing, humans is able to significantly boost the production of dihydrotestosterone, and it does so even when there’s no deficiency in the mineral.
There are numerous studies that show that Tribulus does not increase testosterone levels, and provides no assistance in increasing muscle mass or strength. I one of the two group of rugby players were put on the herb or a placebo. At the end of the experiment, there were zero changes in testosterone levels in the Tribulus group. Says a lot. [Source]
For example, the study published in Obesity Research tells that the scientists measured testosterone levels in two groups of middle-aged men with obesity. One group underwent a 16-week weight loss program, while the second group did nothing. Each participant of the first group lost 20 kg on the average. And these participants experienced a significant increase in testosterone levels. So, the fight against overweight is very important for those who want to overcome testosterone deficiency. But starvation is strictly forbidden because this is a stressful situation which leads to the sharp decline in T levels.
In addition to weightlifting, studies have shown that HIIT workouts can also help boost testosterone levels. For those of you who don’t know, HIIT stands for high-intensity interval training. It calls for short, intense bursts of exercise, followed by a less-intense recovery period. You repeat with the intense/less-intense cycle several times throughout the workout. In addition to increasing T, HIIT has been shown to improve athletic conditioning and fat metabolism, as well as increase muscle strength.
In non-human primates, it may be that testosterone in puberty stimulates sexual arousal, which allows the primate to increasingly seek out sexual experiences with females and thus creates a sexual preference for females. Some research has also indicated that if testosterone is eliminated in an adult male human or other adult male primate's system, its sexual motivation decreases, but there is no corresponding decrease in ability to engage in sexual activity (mounting, ejaculating, etc.).
When your testosterone levels go up, so does your libido. Unfortunately, the inverse is not true — your libido levels can go up without your testosterone levels also going up. And that’s how most supposed T-boosters “work”: they make you feel ornery, leading you to think that your T levels are appreciably higher, when they actually aren’t. In rare cases, supplementation will result in a 20% testosterone increase. This kind of improvement may sound impressive, but is irrelevant for practical purposes.
We know stress generates too much cortisol and shuts down sexual hormones since our bodies go into a "fight or flight" mode. Supplements that nourish our adrenals are key to correcting those imbalances. A few recommendations that I have include adrenal adaptogens such as maca, ashwagandha, Siberian ginseng, and rhodiola. Adaptogens are a great way to restore adrenal glands, balance hormones, and detoxify. Supplementing with 25 to 50 mg of DHEA, and a high-quality multivitamin with bioavailable B vitamins and high dose vitamin C can also be helpful. It's important to eat a diet high in quality omega-3s like salmon, oysters, and sardines. I suggest 2,000 to 6,000 mg per day of carnitine to improve energy production and mitochondrial function.
The real danger comes when you eat a diet high in sugars and carbohydrates (90% of Americans). The sugar binds to LDL (So-called bad cholesterol – PS: It’s not even cholesterol, it’s a protein) and renders it inert. When inert, the LDL cannot pull good cholesterol (HDL) into your cells. This is bad. So what you need to do in conduction with your high fat diet is take in a lot of cruciferous vegetables, limit your carb intake, don’t touch toxic sugars. And exercise regularly.
Thus, alcohol metabolism destroys the essential coenzyme required for T synthesis. Alcohol also contributes to the release of special endorphins which inhibit hormone production. In addition, drinking too much alcohol leads to the elevation of estrogen levels in men because of the conversion of testosterone in estrogen. It means that T levels come down with a run.
“I’m a retired firefighter going on 65 and noticed I was getting soft and bigger in the belly even though I do regular exercise (jogging 3-4 miles 4 to 5 times a week). Since using Andro400, I’ve lost 2 inches off my waist and 12-13 pounds. I did not diet, ate what I normally do (here in Vegas, lots of buffets). Started out with a 38 inch waist, now 36; 195 lbs., now in the 182 range.”
Take 1 teaspoon. Incredibly dense in nutrients and feed by bees to the larvae who grows on to be the queen bee. I found one human study where a 4g daily serving led to an small increase in testosterone in older men (ref 78). There are also numerous animal studies (ref 79) showing positive effects. Personally I source NZ manuka royal jelly from Manuka Health.
[quote]You see there is a difference between your free testosterone levels and your total testosterone levels. As testosterone flows through your blood, free testosterone is chemically active and available for your body to use as it will. While other testosterone is floating around bound to SHGB (Sex Hormone Binding Globulin). This testosterone is inactive and unable to be used by your body because the SHGB renders it inert. So while you may have a high amount of “total testosterone,” much of it may be unavailable to be used by your body. So it is really the amount of free testosterone in your body that you should be concerned with.”[/quote]
Testosterone booster products obtained from trusted sources and administered as per the recommendations of the manufacturer may still present some health risks. The present case provided weak evidence of causality between acute liver injury and a commercial testosterone booster. To guarantee an optimal outcome with no severe side effects, further research is warranted to confirm the present findings and determine whether the effects observed in this case report would be statistically significant in larger samples.
There are many ways to naturally boost testosterone without steroid use. In fact, taking steroid hormones such as testosterone and its chemical analogs actually shuts down the body's natural production of this important muscle-building hormone. The way you train and eat can drastically affect the amount of testosterone your body produces. In addition, there are a few natural supplements that may also boost testosterone.
There are valid concerns about the safety of long-term treatment with testosterone particularly with respect to the cardiovascular system and the potential for stimulating prostate cancer development. There are no convincing hard data, however, to support these concerns. If anything, the data strongly suggest that adequate testosterone availability is cardioprotective and coronary risk factors such as diabetes, obesity and the metabolic syndrome are associated with reduced testosterone levels. It is certainly appropriate to avoid giving testosterone to men with prostate or breast cancer but it is not appropriate to accuse testosterone of inducing the development of de novo prostate cancers since evidence for this accusation is lacking (Wang et al 2004; Feneley and Carruthers 2006).