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There are several naturally occurring plants and vitamins as well as synthetic chemicals that supplement companies claim may produce an increase in testosterone levels.  However, the validity of many of these products is questionable due to a lack of valid scientific research showing their effectiveness, and especially due to evidence that they are ineffective.  Some commonly taken supplements of this type are ZMA and Tribulus terrestris which have been shown to be relatively effective.

In a placebo-controlled study, published in the British Journal of Sports Medicine, a statistically significant increase in strength and arm circumference was achieved with an extract of Eurycoma longifolia (a flowering plant native to Indonesia and Malaysia, also called tongkat ali or pasak bumi). 

In another study on male rats, Eurycoma longifolia extract at the highest administered dosage resulted in an increase in size of a muscle of about 20 percent over controls.  A 2008 study concluded that Eurycoma longifolia is capable of suppressing estrogens which are potent inhibitors of testosterone production.

The relatively new drug 4-androstene-3,6,17-trione - a nutritional supplement that increases testosterone-estrogen ratio.

Excess testosterone can cause undesirable side effects, such as hair loss and acne, and may be converted into estrogens, which can have undesirable effects on males, such as gynecomastia (males - breast enlargement) and testicular atrophy (testes diminishing in size and possible loss of function).

Another relatively new drug Diindolyl Methane or DIM for short is also known for its ability to equalize the testosterone-estrogen ratio in both men and women.


Prohormones are precursors to hormones and were most typically sold to bodybuilders as a precursor to the natural hormone testosterone.  This conversion requires naturally occurring enzymes in the body.  Side effects are not uncommon, as prohormones can also convert further into DHT and estrogen. To deal with this, many supplements also have aromatase inhibitors and DHT blockers such as chrysin and 4-androstene-3,6,17-trione.  To date most prohormone products have not been thoroughly studied, and the health effects of prolonged use are unknown.  Although initially available over the counter, their purchase was made illegal without a prescription in the US in 2004, and they hold similar status in many other countries. Additionally, their use is proscribed by most sporting bodies.

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ALR Industries Jungle Warfare Lean Mass 90caps Testosterone boos
ALR Industries
ALR Industries Jungle Warfare Lean Mass 90caps Testosterone boos
RRP: $ 118.95
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YOUR PRICE : $ 94.50
Young Again DIM 200mg 60 caps Pure Di-Indolyl Methane Anti Estro
Young Again
Young Again DIM 200mg 60 caps Pure Di-Indolyl Methane Anti Estro
RRP: $ 110.00
YOU SAVE: 68.23%
YOUR PRICE : $ 34.95
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