Testosterone is a potent anabolic (muscle building) hormone and, when taken in large enough doses, can transform your physique. Packing on muscle whilst at the same time stripping fat is the holy grail for most lifters. Throw in the benefit of a boost in libido and you start to see why some people would want to boost their testosterone.
So, do testosterone boosters work, should you take them, and what’s the best testosterone booster for you?
In this article, you’ll find:
- What are testosterone boosters?
- Do you need to boost your testosterone?
- The 5 most popular testosterone boosters
- Do testosterone boosters work?
- Side effects
What are testosterone boosters?
Testosterone boosters are supplements that do just that; boost your testosterone levels. They’re often natural compounds such as herbal extracts and have been used in ancient medicine.1
There are also more traditional supplements that, due to their wide range of holistic benefits, may help to maintain testosterone production. Examples of these are vitamin D and ZMA.
Do you need to boost your testosterone?
Testosterone elevation has been shown to enhance muscle mass, improve strength and reduce body fat.2 The higher the testosterone levels, the more pronounced these effects become.3 In healthy men, with testosterone levels in a ‘normal’ range, the evidence for increasing testosterone that still falls within this ‘normal’ scope is currently unclear.4
However, there are a number of factors that can affect production and cause your testosterone to fall below what’s considered ‘normal’. In this instance, there are encouraging findings that some supplements may help to revive testosterone to a normal level.1 This is usually pertinent for aging men as testosterone naturally decreases as you age.5
Additionally, overtraining6, periods of chronic stress7, sleep deprivation8, extreme weight loss (especially if following a low-fat diet)9 and long-term illness10 can all lower testosterone. Signs that your testosterone may be low are a lack of improvement or loss of strength and muscle mass, increased body fat, lack of vitality, lack of libido and a drop in mood.2
In such instances, it’s advisable to seek medical advice. Many supplements may claim to be natural testosterone boosters, but a lot of products just help to maintain normal levels of testosterone instead of actually having a boosting effect. The most powerful testosterone boosters help to raise testosterone levels above normal.
Five of the most popular testosterone boosters
1. D-Aspartic Acid
D-Aspartic acid (DAA) is an amino acid found in reproductive tissues that plays a role in hormone regulation.11
Your body’s testosterone is regulated by the hypothalamic-pituitary-gonadal axis (HPG), a network by which your body’s neural and reproductive systems communicate.12 Increasing the amount of DAA at key sites such as the hypothalamus, pituitary gland and testes has been shown enhance testosterone production.11
In a study where men with low testosterone and no training experience supplemented 3g of DAA for 12 days, testosterone levels were increased by 42%.11
However, in men with normal testosterone levels, with two years of training experience, d-aspartic has shown no increase in muscle gain or strength.13
In fact, in those with training experience, demonstrated by a body weight bench press, d-aspartic has actually shown negative effects. When taking a 6g a day dose, the neural adaptations required to increase strength were blunted.13
2. Tribulus Terrestris
Tribulus Terrestris (TT) has been a popular natural testosterone booster for some time. TT is a herbal extract which has been used in ancient Greek, Chinese and Indian medicine. The claims of its potential to increase libido may go some way to explaining its popularity.14
The way TT is believed to enhance testosterone is by increasing the activity of androgen receptors (a protein which binds to testosterone), in the brain. This then causes the brain to release more luteinising hormone (LH). In turn, LH will stimulate more production of testosterone in the testes and therefore raise serum testosterone levels.14
That’s the theory at least. However, most of the evidence which may be encouraging for the use of TT has been performed in animal studies such as rats and primates. Even then, the data is somewhat inconclusive.14
In clinical trials performed on humans, there’s very little evidence so far to suggest that TT will enhance testosterone in any meaningful way.14
3. Ginseng (Eurycomalongifolia Jack)
Ginseng has a number of different names depending on the region (Malaysian Ginseng, Tongkat ali and Tung Saw) and is a popular medicinal plant.15
It can potentially boost your testosterone levels is by increasing the rate at which free testosterone is released from its binding hormone, sex-hormone-binding-globulin.15
In a study performed in aging males with low testosterone, 200mg of Ginseng each day for one month helped to boost low testosterone levels back to normal.15
There’s also evidence to show that Ginseng can improve your stress hormone profile — for example, the relationship between cortisol and testosterone.16 Essentially, cortisol, which is your body’s stress hormone, is reduced and testosterone is increased. These effects were found in a study investigating the effect of 200mg of Ginseng on stress and mood in moderately stressed men and women. Interestingly, the study also showed that Ginseng reduced tension, confusion, and anger.
Supplementing with Ginseng may therefore help to reduce the risk of your testosterone dropping due to psychological stress.
4. Vitamin D
Vitamin D provides a wide range of benefits to the body as it’s considered a necessity to normal bodily functions rather than just a supplement for testosterone levels. Vitamin D plays a role in muscle function, maintaining bone health, and reducing the risk of infection by boosting your immunity.17
Due to vitamin D-forming enzymes being found in the testes, it’s been suggested that vitamin D may play a role in the production of male reproductive hormones such as testosterone.18
Evidence has been found that, in overweight males trying to lose weight over a 12-month period, long-term supplementation of vitamin D helped to increase testosterone levels.19
However, subsequent studies are yet to support this and the evidence that vitamin D enhances testosterone levels in healthy men is pretty weak.20
That being said, a potential way in which vitamin D may help to maintain testosterone is by reducing the risk of infection. Periods of illness have been shown to decrease testosterone levels9 and evidence shows that a daily intake of 1000IU (International Units are used as measurements for fat soluble vitamins such as D, E and K) of vitamin D can improve immunity.21
Although a small amount of vitamin D is found in the diet, the majority of our vitamin D comes from exposure to sunlight.21 Living in the UK, even in summer months, our intake of vitamin D may be limited.21 This means supplementing with vitamin D may well be worthwhile regardless of its effect on testosterone production.
Get our full guide to Vitamin D and all of its benefits here…
ZMA is made up of zinc monomethionine aspartate, magnesium aspartate and vitamin B6. Due to low levels of zinc and magnesium resulting in a drop in your body’s testosterone production, the theory is that supplementing ZMA may help boost your testosterone levels.22
Zinc and magnesium are also lost in sweat, so if you train regularly at a high intensity, you may be suffering from low levels of zinc and magnesium and potentially a subsequent drop in testosterone production.23
The evidence for this, however, remains inconclusive. The only study to show that ZMA increases testosterone levels was performed in young, college level, American football players.24 They found that 8 weeks of ZMA supplementation during pre-season increased free and total testosterone. However, further studies have not supported this.22
A less direct way in which ZMA may help with testosterone is through the impact it can have on your sleep. Zinc, a component of ZMA, has been shown to potentially improve the duration and quality of sleep due to its role in the central nervous system.25
This may be important, as a lack of sleep can reduce your testosterone.8 A study looking at comparison between 8 hours and 5 hours of sleep showed that 5 hours sleep a night reduced testosterone levels by 10-15%.8
Supplementing ZMA may therefore help boost your testosterone levels if you suffer from a lack of sleep.
Do Testosterone Boosters Work?
Despite the alluring appeal of a herbal extract being the miracle for fast-track gains, there’s little evidence to show that any natural testosterone booster supplements have such an impact.
A much more potent way to enhance your testosterone is to follow a healthy diet, get plenty of good quality sleep, and consistently perform resistance training for a long period of time.
Side Effects Testosterone Boosters
Despite testosterone boosters having little impact on your testosterone, excessive amounts can still be dangerous. There have been numerous cases of kidney and liver injury and abdominal pain.26
Take Home Message
So, do testosterone boosters work? Although they’re unlikely to transform your physique if you have healthy levels of testosterone, there may be certain circumstances where supplementing natural testosterone boosters can help to maintain production and even restore low levels back up to a normal range.
Testosterone boosters and other holistic supplements may help to improve your stress levels so this could be particularly beneficial at times when stress levels are high.
Ingesting extreme doses of testosterone boosters can be dangerous and there are reports of excessive amounts causing kidney and liver injury.
The best way to increase your testosterone is by regular long term resistance training combined with a healthy diet and a good night’s sleep, therefore the best testosterone boosters may be those which help maintain a healthy lifestyle.