Aspartic Acid
Description
Aspartic Acid, chemically known as aspartate, is one of the 20 common amino acids that are the building blocks of proteins. It is involved in critical biochemical processes such as the synthesis of other amino acids (e.g., asparagine, methionine, threonine, isoleucine, lysine) and nucleotides. It also plays a key role in the Krebs cycle, contributing to energy production, and in the urea cycle, which helps eliminate ammonia from the body. As a neurotransmitter, it acts as an excitatory agent in the brain.
Sources
MeatPoultryEggsDairy productsFishLegumesNutsSeedsWhole grainsAsparagusAvocadoSugarcane
Timing & Intake
Anytime
Aspartic Acid can generally be taken at any time of day, with or without food, as part of a balanced diet or supplement regimen. Specific forms like D-Aspartic Acid may have different timing recommendations based on their intended use (e.g., hormone support).
Optimal Dosage
Minimum1000 mg
Maximum3000 mg
Safety & Toxicity
Interactions
Recommended products
Best 
Attentive Child
Source Naturals
Aspartic Acid: 310 mg
This product combines key minerals with cognitive compounds like DMAE and Phosphatidylserine to help support focus and mental clarity, offered in a convenient tablet form.
Best 
Attentive Child Sweet & Tart
Source Naturals
Aspartic Acid: 310 mg
This sweet and tart product provides magnesium, zinc, DMAE, and phosphatidylserine to support mental focus and brain health, in a flavored chewable form.
Best 
Pegan Thin Seed Protein 20 g Triple Chocolate
Julian Bakery
Aspartic Acid: 1387 mg
<p>This Julian Bakery seed protein offers 20g of protein with a full amino acid profile, fitting Pegan and Vegan diets, though it comes at a premium price.</p>
Best 
Caprotein
Mt. Capra
Aspartic Acid: 525 mg
Caprotein is a goat milk protein powder that supplies a full range of amino acids and calcium, aiming to support muscle, bone health, energy, and overall wellness.
Budget 
Thyro-Max Support
Country Life
Aspartic Acid: 200 mg
Thyro-Max Support combines iodine, L-tyrosine, B vitamins, and essential minerals to help bolster metabolic function, energy levels, and overall vitality.
Budget 
Max-Amino Caps with Vitamin B6
Country Life
Aspartic Acid: 140 mg
This is a versatile amino acid blend with Vitamin B6, suitable for supporting overall metabolic health and providing the body with a wide range of protein building blocks.
Budget 
Max-Amino Caps with Vitamin B6
Country Life
Aspartic Acid: 140 mg
This is a comprehensive amino acid blend with added Vitamin B6, suitable for general nutritional support across many bodily functions, though it lacks one essential amino acid, L-Tryptophan.
Value 
Advanced Magnesium Complex
AOR Advanced Orthomolecular Research Advanced
Aspartic Acid: 150 mg
This complex combines a high dose of multiple well-absorbed magnesium forms with a generous amount of glycine, making it a comprehensive option for various health goals, particularly relaxation and bone support.
Budget 
Amino Blend
Progressive Professional from Progressive Laboratories
Aspartic Acid: 206 mg
This amino acid blend provides a broad spectrum of essential and non-essential amino acids, supporting general wellness and various bodily functions with a balanced, foundational approach.
Best 
Attentive Child
Source Naturals
Aspartic Acid: 310 mg
This product combines magnesium, zinc, DMAE, and phosphatidylserine to support cognitive function and mental focus, rounded out with grape seed extract for added benefits.
Best 
MacroMeal Ultimate Chocolate Protein Powder
MacroLife Naturals
Aspartic Acid: 2887 mg
This is a multi-source protein powder enhanced with greens, digestive enzymes, and probiotics, aiming for broad nutritional support in a convenient chocolate-flavored drink.
Best 
MacroMeal Ultimate Vanilla Protein Powder
MacroLife Naturals
Aspartic Acid: 2801 mg
MacroMeal Ultimate Vanilla is a multi-source protein powder packed with greens, fruits, enzymes, and probiotics, designed for broad nutritional support and muscle maintenance.
Best 
MacroMeal Ultimate Vanilla Protein Powder
MacroLife Naturals
Aspartic Acid: 2803 mg
A plant-based protein powder with added superfoods, digestive enzymes, and probiotics, delivering comprehensive nutritional support in a vanilla flavor.
Best 
MacroMeal Ultimate Vanilla Protein Powder
MacroLife Naturals
Aspartic Acid: 2803 mg
This is a plant-based, multi-ingredient protein powder with superfoods and digestive support, available in a smaller, more expensive-per-serving vanilla package.
Best 
MacroMeal Ultimate Chocolate Protein Powder
MacroLife Naturals
Aspartic Acid: 2887 mg
MacroMeal Ultimate Chocolate is a comprehensive protein powder with added greens, fruits, enzymes, and probiotics, aiming for broad nutritional support and muscle upkeep in a chocolate flavor.
Product stats
Price per product
Average$31.17
Median$29.99
Price per serving
Average$1.44
Median$1.14
Price per 100 mg
Average$0.24
Median$0.16
Price distribution
Price per serving distribution
Price per 100 mg
Reference amount: 100 mg
Forms
Paired ingredients
Ingredient forms
Magnesium Aspartate (3) 4
Magnesium Aspartate combines magnesium with aspartic acid, which serves as a carrier to enhance the mineral's absorption. Magnesium is crucial for over 300 enzymatic reactions in the body, including those involved in energy production, muscle function, and nerve transmission. For testosterone support, adequate magnesium intake is known to reduce sex hormone-binding globulin (SHBG), thereby increasing the availability of free, biologically active testosterone.
Pros
- Enhanced absorption of magnesium
- Supports free testosterone levels by reducing SHBG
- Essential for muscle and nerve function
Cons
- May cause mild digestive upset (e.g., diarrhea) in high doses
Per product
Avg$19.47
Med$20.69
Per serving
Avg$0.37
Med$0.34
Per 100 mg
Avg$0.15
Med$0.16
Price distribution
L-Aspartic Acid (1) 2
L-Aspartic Acid is one of the 20 common amino acids that are fundamental building blocks for proteins in the human body. It participates in various metabolic pathways, including the urea cycle and gluconeogenesis, and also functions as a neurotransmitter. While D-Aspartic Acid (D-AA) has been studied for its potential role in testosterone regulation, L-Aspartic Acid does not exhibit the same direct effects on testosterone levels. Its primary benefits are related to general protein metabolism.
Pros
- Essential building block for proteins
- Involved in energy metabolism and detoxification processes
Cons
- No direct evidence for testosterone support in this L-form
- Less effective for this specific goal compared to D-Aspartic Acid or magnesium forms
Per product
Avg$11.39
Med$11.39
Per serving
Avg$0.37
Med$0.37
Per 100 mg
Avg$0.06
Med$0.06
Price distribution
Magnesium Aspartic Acid Complex (1) 4
This complex provides magnesium chelated with aspartic acid, aiming to maximize the mineral's bioavailability and absorption. Magnesium is vital for numerous physiological processes, including ATP production, nerve and muscle function, and maintaining electrolyte balance. Regarding testosterone, adequate magnesium intake is associated with higher free testosterone levels, primarily by decreasing sex hormone-binding globulin (SHBG), which binds to testosterone and renders it inactive. The aspartic acid helps facilitate magnesium's entry into cells.
Pros
- Excellent bioavailability of magnesium
- Supports free testosterone by reducing SHBG
- Essential for muscle and nerve function
Cons
- High doses may lead to gastrointestinal discomfort, such as loose stools
Per product
Avg$11.39
Med$11.39
Per serving
Avg$0.37
Med$0.37
Per 100 mg
Avg$0.06
Med$0.06
Price distribution