Testosterone Boosters With D-Aspartic Acid

Testosterone Boosters With D-Aspartic Acid

When you are looking for an effective testosterone booster, nutrient analysis is key. As such, you may have read about D-Aspartic Acid.

It is an amino acid that can be key in raising testosterone levels, particularly if you are infertile or new to training.

LAST UPDATED: March 2019 by Ben

What’s the fuss about D-Aspartic Acid?

D-Aspartic Acid is a proven ingredient that can help raise testosterone levels. [1]

It is present in many foods, yet the value per 100g does not really go above 10g.

Common foods that include D-Aspartic Acid are as follows:

  • Soy protein
  • Dried egg white
  • Cod fish
  • Tofu
  • Sunflower seeds
  • Pork
  • Beef

Essentially, the most D-Aspartic per 100g is found in the top food and gradually decreases as you go down. [2]

Yet, why is it so important?

In simple terms, D-Aspartic Acid is one of two amino acid aspartic acid, DAA is a regulator of testosterone synthesis.

It stimulates the release of growth hormone, luteinizing hormone and increases testosterone levels of up to 60% after building up in the testes. [3]

It can also have a major effect on male fertility with studies reporting that from a group of men who could not previously conceive, over a quarter did so after supplementation.

This correlates with an increase of up to 100% sperm mobility for infertile men. [4]

Yet, women are also to benefit, with younger women having a higher concentration of DAA than their older counterparts, which presents itself a relationship between DAA levels, age and fertility. [5]

Not only that, but it is worth noting that Nitric Oxide levels can increase also, but only in very high doses. [6]

With all of this in mind, and all of the studies presenting their findings, it now becomes clear why D-Aspartic Acid is such an important ingredient to ensure is in your testosterone booster.

Or at least, in your diet, if you like soy, dried egg white, sunflower seeds among others…

It is also imperative that you get sufficient amounts of D-Aspartic Acid for the benefits, 2000mg per day is about right. [7]

man and woman resistance training in the gym

Soy and testosterone

This is where matters become a little confusing.

Soy protein offers the most DAA per 100g on that list.

However, soy itself has demonstrated in clinical trials to decrease testosterone.

Yes, it sounds crazy.

However, participants who were using soy protein powder for a month saw a decrease in their serum testosterone levels.

Once they stopped using the soy protein, their testosterone levels started to rise. [8]

Furthermore, there appears to be a evidence that would suggest soy products can reduce fertility, too. This consequently sparked a response from many media outlets in the UK. [9]

However, to muddy the waters further, alternative studies have produced findings that contradict those findings. [10]

In addition to this, even the Association of UK Dietitians state that here is no conclusive evidence that soy will increase estrogen levels. [11]

Soy and fertility

Once again, confusion reigns.

I found a study that concluded a high intake of soy and the associated soy isoflavones caused resulted in a decreased level of sperm. [12]

Furthermore, similar results extend to women whereby the data suggests it can alter hormone levels and disrupt ovarian function.

Thus, the resulting levels of gonadotropin were reduced. [13]


The evidence points toward D-Aspartic Acid being an effective way to increase your testosterone levels, even if it is just temporarily.

This could be the kick start that you need, to help increase vitality and get your weight training off the ground.

It can even help improve fertility, in both men and women.

In addition it is available in many foods.


However, this is where it can become complicated and difficult.

We have demonstrated that there are contradictory findings regarding soy.

Some studies state that it affects hormone levels, and others do not.

But there is more.

If you want to omit soy from your diet sue to the potential risks, it would still be difficult to get the 2000mg daily from the other food options.

As a result, it may be more convenient and a more cost effective way to use a supplement that has the required daily dose.


[1] https://www.ncbi.nlm.nih.gov/pubmed/8699926

[2] http://www.annualreviews.org/doi/abs/10.1146/annurev.nu.07.070187.001233?journalCode=nutr&

[3] https://www.ncbi.nlm.nih.gov/pubmed/19860889

[4] http://www.scirp.org/journal/PaperInformation.aspx?paperID=24016

[5] https://www.ncbi.nlm.nih.gov/pubmed/17951582

[6] https://www.ncbi.nlm.nih.gov/pubmed/19381779

[7] https://www.ncbi.nlm.nih.gov/pubmed/10744627

[8] https://www.ncbi.nlm.nih.gov/pubmed/17416779

[9] https://www.nhs.uk/news/pregnancy-and-child/soya-based-food-and-male-fertility/#what-kind-of-scientific-study-was-this

[10] https://jissn.biomedcentral.com/articles/10.1186/1550-2783-4-4

[11] https://www.bda.uk.com/foodfacts/soya_and_health.pdf

[12] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2721724/

[13] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3139237/

Testosterone boosters with D-Aspartic Acid
Article Name
Testosterone boosters with D-Aspartic Acid
We lok at the advantages of using a testosterone booster that includes D-Aspartic acid.

Ben BA(Hons), PGCert

Ben established this site to be a free resource in 2015. Since then it has gained over half a million visits. He has always been interested in sport and he started playing rugby at the age of 6 represented his town, county and school. Ben also enjoys cycling, has started skiing and is in the Army Reserve representing his Regiment as part of the 150 Regimental Shooting Team. He holds a bachelor's and postgraduate degree in sport exercise & nutrition.

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