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D-Aspartic Acid

Contains 150 Capsules

5% Nutrition Core D-Aspartic Acid boosts natural testosterone production and of course, 5% provides the recommended dose. More testosterone means more muscle growth, enhanced stamina, and improved sexual function.
D-Aspartic Acid - 5% Nutrition


When it comes to building muscle, nothing beats testosterone

It’s no wonder it’s considered the King of the natural hormones produced by your body. As any 5%er most likely knows, testosterone has a range of functions in the body. These include key roles in stimulating muscle growth, enhancing sex drive, and improving stamina.

Yet, there’s a problem. As we start getting older, our natural levels get progressively lower. In this case, beginning to get older means your mid-twenties.

The answer is 5% Nutrition Core D-Aspartic Acid!

One serving of 5% Core D-Aspartic Acid provides 3,120mg per serving. This potent ingredient is one of the most effective natural test boosters available.

Did you think we stopped there? You know us better than that. We also added 200 mg of DIM. What’s better than increasing testosterone and controlling estrogen?

The great thing about Core D-Aspartic Acid is you can stack it with our other test boosting formulas, namely Core ZMA. Combining these two gives you a powerful testosterone-boosting stack. Based on your goals, you can build your stack from there.

Let’s check out the ingredients.


D-Aspartic Acid - 3,120mg

This is an essential amino acid that occurs naturally in the testes, hypothalamus, and pituitary glands. There’s one main clinical study that showed an increase in the body’s levels of testosterone using this ingredient. It was conducted on 23 male test subjects. Each test subject was given one 3-gram dose per day. After 12 days, testosterone levels of the test subjects increased on average by 42%. That’s one heck of an increase!(1)

DIM - 200mg

You want estrogen under control when your testosterone levels increase. DIM, or 3,3'-Diindolylmethane, does this by blocking aromatase. This is the enzyme that converts excess levels of testosterone into estrogen. This, of course, leads to unwanted side effects such as bloating and fat gain.(2)

If you want the most out of your program, you want the most out of your body’s natural testosterone production and the place to start is 5% Nutrition Core D-Aspartic Acid.

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Supplement Facts

  • USA
Serving Size: 5 Capsules Servings Per Container: 30
Per serving % Daily Value
D-Aspartic Acid 3,120 mg **
DIM (3,3'-Diindolylmethane) 200 mg **

**Daily Value not extablished
Other Ingredients: Gelatin (Capsule), Microcrystalline Cellulose, Silicon Dioxide, Magnesium Stearate


Frequently Asked Questions

  • What are the suggested directions for using Core – D-Aspartic Acid?

    Take 5 capsules by mouth once daily with a meal. Take at the same time every day.

  • Why is D-Aspartic Acid the best product within its category on the market?

    5% Core D-Aspartic Acid not only features the full clinical dose of D-Aspartic Acid. We take it one step farther and add in 200mg of DIM. Increase testosterone and control estrogen with one formula!

  • What is the optimal training style for people taking D-Aspartic Acid?

    While Core D-Aspartic Acid will work with any resistance-based exercise or endurance-based training style, it is ideal for intense workouts using medium to high volume and 70-85% 1RM for reps in the 8-12 range that include beyond failure techniques.

  • What 5% Nutrition® products can I stack with D-Aspartic Acid?

    Core ZMA, Shake Time or Real Carbs + Protein, Drink, Sleep, Grow, ADYM, Bigger By The Day, and the 5% pre-workout of your choice.

  • Who can take D-Aspartic Acid?

    Anyone 18 years of age and older.

  • Do I need to cycle D-Aspartic Acid?

    Core D-Aspartic Acid does not need to be cycled.

  • What are the D-Aspartic Acid capsules made from?



  1. Topo, E., Soricelli, A., D'Aniello, A., Ronsini, S., & D'Aniello, G. (2009). The role and molecular mechanism of D-aspartic acid in the release and synthesis of LH and testosterone in humans and rats. Reproductive biology and endocrinology : RB&E, 7, 120.
  2. Diindolylmethane Supplement — Health Benefits, Dosage, Side Effects |

Product Warnings

Not intended for persons under the age of 18. Do not use if pregnant or nursing. Consult a health care professional prior to consumption if you have any pre-existing medical conditions including but not limited to: diabetes, high or low blood pressure, heart, liver or kidney disease, cardiac arrhythmia, stroke or are taking any prescription medication.
Store in a cool, dry place away from sunlight and with lid tightly secured.
†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
 WARNING: Consuming this product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to