Best D-Aspartic Acid Supplements (2026)

D-Aspartic Acid (DAA) is an amino acid that plays a direct role in testosterone synthesis and luteinizing hormone production. Popular among athletes and men over 30 looking to naturally support healthy testosterone levels, DAA supplements are available in capsules, tablets, and powders — with clinical research supporting doses of 2,000-3,000mg per day for hormonal support.

Quick Comparison

Product	Key Ingredient	Form	Best For	Rating
Nutricost D-Aspartic Acid 3000mg	3,000mg DAA (4 caps)	Capsules	Best Overall	9.5/10
BulkSupplements D-Aspartic Acid	3,000mg DAA (6 caps)	Capsules	Best Value	9.3/10
Micro Ingredients D-Aspartic Acid	3,000mg DAA (4 caps)	Capsules	Best Large Supply	9.2/10
Carlyle D-Aspartic Acid	3,000mg DAA (4 caps)	Capsules	Best for Athletes	9.1/10
Best Naturals D-Aspartic Acid	3,000mg DAA (3 tabs)	Tablets	Best Tablet Form	9.0/10
Eagleshine DAA 3000mg	3,000mg DAA (4 caps)	Capsules	Best Budget Pick	8.8/10
Nutricost DAA Powder	3,000mg DAA (1 scoop)	Powder	Best Powder	8.7/10

1. Nutricost D-Aspartic Acid 3000mg – Best Overall

Nutricost’s DAA capsules deliver the clinically studied 3,000mg dose in a clean, no-frills formulation backed by third-party testing and GMP manufacturing — the benchmark for pure D-Aspartic Acid supplementation.

Each four-capsule serving provides 3,000mg of pure D-Aspartic Acid with no proprietary blends or unnecessary additives. The 180-capsule bottle provides a 45-day supply at the full 3,000mg daily dose. Nutricost manufactures in GMP-compliant facilities in the USA and subjects every batch to third-party testing for purity and potency. The product is non-GMO and gluten-free, using only D-Aspartic Acid, gelatin capsules, magnesium stearate, and silica.

• Pros:
• Full 3,000mg clinical dose per serving
• Third-party tested for purity and potency
• Clean formula with minimal excipients

• Cons:
• Requires 4 capsules per serving
• Capsules are on the larger side

Best for: Anyone seeking a straightforward, well-tested D-Aspartic Acid supplement at the research-backed dose

2. BulkSupplements D-Aspartic Acid Capsules – Best Value

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BulkSupplements applies their signature no-nonsense approach to DAA, delivering 3,000mg per serving in a clean formula with nothing but pure D-Aspartic Acid at an unbeatable price per gram.

Each six-capsule serving provides 3,000mg of D-Aspartic Acid in a soy-free, unflavored formulation. BulkSupplements is known for their ingredient-focused approach — no artificial colors, flavors, or preservatives. The 180-capsule bottle provides a 30-day supply at the full dose. Every batch is manufactured in a GMP-certified, FDA-registered facility and tested for purity by an ISO 17025-accredited lab. The brand’s direct-to-consumer model keeps pricing among the lowest in the category.

• Pros:
• Among the lowest cost-per-gram DAA supplements
• ISO-accredited lab testing for verified purity
• Soy-free with no artificial additives

• Cons:
• Requires 6 capsules per serving (500mg per cap)
• Higher capsule count per dose than competitors

Best for: Cost-conscious buyers who want lab-verified purity at the lowest possible price

3. Micro Ingredients D-Aspartic Acid – Best Large Supply

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Micro Ingredients delivers the largest capsule count in the DAA category with 300 capsules per bottle, providing up to 75 days of full-dose supplementation.

Each four-capsule serving provides 3,000mg of pure D-Aspartic Acid. The 300-capsule bottle is the biggest in the mainstream DAA market, offering a 75-day supply at the full clinical dose. Micro Ingredients manufactures in the USA and ensures all products are free from preservatives, sugar, artificial colors, flavors, soy, and gluten. The non-GMO formula uses clean capsule shells with no unnecessary fillers or binders.

• Pros:
• 300 capsules — the largest supply available
• Non-GMO with no fillers, preservatives, or artificial ingredients
• Excellent per-serving value

• Cons:
• Requires 4 capsules daily
• May take time to see noticeable results

Best for: Long-term DAA users who want to minimize reorders and maximize per-capsule savings

4. Carlyle D-Aspartic Acid – Best for Athletes

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Carlyle’s Advanced Athlete Formula delivers 3,000mg of DAA per serving in a formulation specifically designed for active individuals and competitive athletes.

Each four-capsule serving provides the full 3,000mg research-backed dose of D-Aspartic Acid. Carlyle positions this as an “Advanced Athlete Formula,” targeting men focused on performance, recovery, and maintaining healthy testosterone levels through training. The 180-capsule bottle provides a 45-day supply. The product is non-GMO, gluten-free, and manufactured under strict quality standards with no artificial colors, flavors, or sweeteners.

• Pros:
• Formulated specifically for athletes and active users
• Full 3,000mg clinical dose
• Non-GMO and gluten-free

• Cons:
• Similar formulation to other 3,000mg products at a slightly higher price
• 4 capsules per serving

Best for: Athletes and fitness enthusiasts seeking a DAA supplement tailored for performance and recovery

5. Best Naturals D-Aspartic Acid – Best Tablet Form

Best Naturals offers D-Aspartic Acid in a pressed tablet format — a convenient alternative for users who prefer tablets over capsules or powder.

Each three-tablet serving delivers 3,000mg of D-Aspartic Acid. The tablet format provides a stable, shelf-friendly form that doesn’t require refrigeration or special storage. Best Naturals is a small business brand that manufactures in the USA and ensures their products are non-GMO, gluten-free, and free from artificial colors, flavors, sweeteners, preservatives, sugar, starch, soy, egg, lactose, wheat, yeast, and fish. Each 180-tablet bottle provides a 60-day supply.

• Pros:
• Tablet format requires only 3 per serving (vs. 4-6 capsules)
• 60-day supply at full dose
• Free from all major allergens

• Cons:
• Tablets may be harder to swallow than capsules for some users
• Contains binding agents necessary for tablet compression

Best for: Users who prefer tablets over capsules and want fewer pills per serving

6. Biotech Nutritions D-Aspartic Acid – Best High-Count Capsules

Biotech Nutritions packs 200 capsules into each bottle at the 3,000mg-per-serving dose, offering one of the longest-lasting capsule-form DAA supplies on the market.

Each serving provides 3,000mg of D-Aspartic Acid designed to support testosterone levels, nitric oxide production, and athletic performance. The 200-capsule bottle provides a 50-day supply at the full clinical dose. The product uses vegetable capsules with magnesium stearate and is manufactured to meet strict quality standards. Biotech Nutritions focuses on straightforward, single-ingredient sports nutrition supplements.

• Pros:
• 200 capsules per bottle for extended supply
• Straightforward single-ingredient formula
• Affordable price point

• Cons:
• Less well-known brand than some competitors
• Limited third-party testing transparency

Best for: Users who want a high capsule count at a competitive price from a sports nutrition-focused brand

7. Eagleshine DAA D-Aspartic Acid 3000mg – Best Budget Pick

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Eagleshine delivers the full 3,000mg DAA dose in a 180-capsule bottle with a 60-day money-back guarantee — a low-risk option for first-time DAA users.

Each four-capsule serving provides 3,000mg of D-Aspartic Acid. Eagleshine subjects their DAA to third-party testing and manufactures in the USA. The product is non-GMO, gluten-free, dairy-free, and contains no preservatives, tree nuts, or sugar. The brand offers a 60-day unconditional money-back guarantee, making it one of the lowest-risk purchases in the DAA category. Customer reviews frequently cite improved energy, workout performance, and mood.

• Pros:
• 60-day money-back guarantee
• Third-party tested and USA-made
• Free from all major allergens

• Cons:
• Smaller brand with less market recognition
• Results may vary between individuals

Best for: First-time DAA users who want a risk-free trial with a money-back guarantee

8. Nutricost D-Aspartic Acid Powder – Best Powder

Nutricost’s pure DAA powder provides the most flexible and cost-effective way to supplement D-Aspartic Acid, allowing precise dose customization and easy mixing into shakes.

The 500g bag provides approximately 167 servings at the standard 3g (3,000mg) dose, making it by far the most economical DAA option per serving. The unflavored powder mixes into water, protein shakes, or pre-workout drinks. Nutricost uses 100% pure D-Aspartic Acid with no fillers, sweeteners, or additives. The product is non-GMO, gluten-free, and manufactured in a GMP-compliant facility with third-party testing.

• Pros:
• 167 servings per bag — best value per serving
• Flexible dosing — easily adjust to your needs
• 100% pure DAA with no additives

• Cons:
• Unflavored powder has a slightly sour taste
• Requires a scale or scoop for accurate dosing

Best for: Experienced supplement users who want maximum value and dose flexibility in powder form

9. Healthfare D-Aspartic Acid – Best Vegan Option

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Healthfare delivers 3,000mg of premium DAA in 200 vegan capsules, making it the top choice for plant-based athletes who want testosterone and performance support without animal-derived ingredients.

Each four-capsule serving provides 3,000mg of naturally sourced D-Aspartic Acid in vegan-friendly capsules. The 200-capsule bottle provides a 50-day supply at the full research-backed dose. Healthfare manufactures in the USA using non-GMO ingredients and ensures every batch is free from gluten, soy, dairy, and artificial additives. The product is specifically marketed as a premium amino acid supplement suitable for vegetarian and vegan lifestyles.

• Pros:
• 100% vegan capsules — no gelatin or animal products
• 200-capsule bottle for extended supply
• Non-GMO and free from major allergens

• Cons:
• Vegan capsules may be slightly less stable in humid environments
• 4 capsules required per serving

Best for: Vegan and vegetarian athletes who need a clean, plant-based D-Aspartic Acid supplement

10. Kaibro Nutra D-Aspartic Acid 2440mg – Best Moderate Dose

Kaibro Nutra provides a slightly lower 2,440mg dose per serving for users who want DAA support without the full 3,000mg — ideal for stacking with other testosterone-supporting nutrients.

Each three-capsule serving delivers 2,440mg of pure D-Aspartic Acid, offering a moderate dose that falls within the effective research range while leaving room to combine with other supplements like zinc, magnesium, or vitamin D. The 180-capsule bottle provides a 60-day supply. Kaibro Nutra uses vegan capsules and manufactures in GMP-certified facilities in the USA. The product is non-GMO, gluten-free, and contains no fillers, binders, or preservatives.

• Pros:
• Moderate 2,440mg dose — ideal for supplement stacking
• Only 3 capsules per serving (fewer than most competitors)
• 60-day supply in vegan capsules

• Cons:
• Below the 3,000mg dose used in most clinical studies
• Less familiar brand than Nutricost or BulkSupplements

Best for: Users who prefer a moderate DAA dose to complement a broader testosterone support stack

How to Choose the Best D-Aspartic Acid Supplement

The standard research-backed dose of D-Aspartic Acid is 2,000-3,000mg per day. Most clinical studies examining testosterone and luteinizing hormone support have used 3,000mg daily, making this the target dose for most users. Products delivering less than 2,000mg per serving may not provide the same hormonal support shown in research.

Form is largely a matter of personal preference. Capsules are the most convenient option, though they typically require 4-6 per serving to reach the 3,000mg dose. Tablets can reduce the per-serving pill count to 3. Powder is the most cost-effective choice and offers precise dose control, but the slightly sour flavor may require mixing with a flavored beverage.

Purity matters significantly with amino acid supplements. Look for products that list D-Aspartic Acid as the sole active ingredient without proprietary blends that obscure the actual DAA content. Third-party testing, GMP certification, and Non-GMO verification are all markers of a reputable product. Avoid supplements that combine DAA with numerous other ingredients at unknown doses.

Cycling is commonly recommended for DAA supplementation. A typical protocol involves taking DAA for 2-3 weeks followed by 1-2 weeks off to prevent the body from downregulating its response. Some users cycle 12 days on and 7 days off. Consult with a healthcare provider to determine the best cycling approach for your individual goals.

Frequently Asked Questions

What is D-Aspartic Acid and what does it do?

D-Aspartic Acid (DAA) is a non-essential amino acid found naturally in the body. It plays a role in the production and release of testosterone by stimulating luteinizing hormone (LH) in the pituitary gland, which signals the testes to produce more testosterone. DAA is also involved in growth hormone release and may support fertility by improving sperm quality and motility.

How much D-Aspartic Acid should I take daily?

The standard research dose is 2,000-3,000mg per day. Most clinical studies showing testosterone support used 3,000mg daily for 12-14 days. Some users take a maintenance dose of 2,000mg. Higher doses have not been shown to provide additional benefits and may actually reduce effectiveness. Follow the manufacturer’s dosing instructions and consider cycling on and off.

When is the best time to take D-Aspartic Acid?

DAA can be taken at any time of day, with or without food. Many users split the dose between morning and evening for more consistent amino acid availability. Taking DAA with a meal may improve absorption and reduce the chance of mild stomach discomfort. For those using it to support training, taking it in the morning or pre-workout is a common approach.

Are there any side effects of D-Aspartic Acid?

DAA is generally well tolerated at recommended doses. Some users report mild side effects including headache, stomach discomfort, irritability, or acne — typically associated with changes in hormone levels. These effects usually subside as the body adjusts. Cycling DAA (2-3 weeks on, 1-2 weeks off) may help minimize side effects. Consult a healthcare provider before use if you have hormonal conditions.

Can I take D-Aspartic Acid with other supplements?

DAA is commonly stacked with zinc, vitamin D, magnesium, and fenugreek for comprehensive testosterone support. It can also be combined with creatine and protein supplements for athletic performance goals. Avoid stacking with other hormonal supplements without medical guidance, as combined effects on testosterone and estrogen metabolism are complex and individual.

How long does it take for D-Aspartic Acid to work?

Research shows measurable increases in luteinizing hormone and testosterone levels within 6-12 days of consistent 3,000mg daily supplementation. Many users report subjective improvements in energy, motivation, and workout performance within the first 1-2 weeks. For fertility-related benefits, studies typically assess outcomes over 60-90 days of use.