Monday, November 24, 2025

Aspartic acid

Facts

Why aspartic acid is good for you

L-aspartic acid (or aspartate) is a non-essential amino acid as it can be produced in the body. Aspartic acid is found in abundance in plant proteins, especially in sprouting seeds. L-aspartic acid plays a vital role in energy production.

Important aspartic acid facts

  • Aspartic acid is of vital importance in the metabolism and construction of other amino acids and biochemicals in the citric acid cycle
  • Aspartic acid is termed an excitory amino acid neurotransmitter as it plays a role in stimulating synapes in the central nervous system (brain and spinal cord)
  • Aspartic acid is made from glutamic acid (or glutamate)
  • Among the biochemicals that are synthesized from aspartic acid are arginine, lysine, methionine, threonine, isoleucine, and several nucleotides

Aspartic acid works best with

Health

Aspartic acid and health

  • Liver health – aspartic acid benefits the liver by removing excess ammonia from the liver. Aspartic acid combines with other amino acids to form molecules that absorb toxins and remove them from the bloodstream
  • Chronic fatigue syndrome – since aspartic acid increases stamina, it is good for fatigue (chronic fatigue syndrome may result from low levels of aspartic acid, because this can lead to lowered cellular energy)

Talk to a medical professional about aspartic acid supplements before taking them

Deficiency

Groups at risk of aspartic acid deficiency

Deficiency is very rare, but can occur in the following individuals:

  • People on very low protein diets – people who are not eating enough protein foods may not get enough aspartic acid in their diet

People in these groups at risk of aspartic acid deficiency should talk to a medical professional about aspartic acid supplementation before trying them.

Symptoms of aspartic acid deficiency

Symptoms of aspartic acid are very rare, but may include fatigue and depression.

Food sources

Aspartic acid in food

FOODAMOUNT
Aspartic Acid (mg)
Lean Round Beef
450g
13150
Lean Leg of Veal
450g
10899
1/2 Turkey Breast – no skin
306g
8937
1/2 Chicken
329g
6274
Clams – mixed species
20 small (190g)
4682
Snapper, cooked
1 fillet (170g)
4576
Atlantic cod, cooked
1 fillet (180g)
4209
Northern pike, cooked
1/2 fillet (155g)
3919
Ling, cooked
1 fillet (151g)
3764
Yellow fish tuna , cooked
100g
3069
Alaskan king crab, cooked
1 leg (172g)
2680
Blue crab, cooked
1 cup (118g)
2643
Pacific cod, cooked
1 fillet (90g)
2115
Whiting, cooking
1 fillet (72g)
1731
Atlantic perch, cooked
1 fillet (50g)
1223
Bacon, pan-fried
28g
1010
Ricotta, park skim
100g
1007
Milk, 1% fat
1 cup
759

 

Daily intake

Aspartic acid recommended daily intake (RDI)

RDANo information available
TOLERABLE UPPER LIMIT1.5g – 2.0g per day
TOXIC LEVELSNo information available

 

Toxicity

Overdosage, toxicity and cautions for aspartic acid

No information known.

Precautions

Precautions

 

Interactions

Interactions

 

References

References

  • Osiecki H, Meeke F, Smith J, The Encyclopaedia of Clinical Nutrition – Volume 1: The Nervous System, BioConceps Publishing QLD 2004

Last reviewed and updated: 8 May 2024

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