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L-Asparagine

Non-essential amino acid important for nervous system function, immune support, and protein synthesis

Scientific nameL-Asparagine FormulaC4H8N2O3 Molecular weight132.12 g/mol CAS70-47-3
95 absorption score
9 safety / 10
18 USD per month
5 documented interactions

Check it against something

No documented links

L-Asparagine with:

Compatibility score 70 out of 100
70 out of 100
No known interaction No documented interaction. Standard timing for each applies.

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What it does

mechanism and evidence for each claim

Enhanced nervous system function

Supports neurotransmitter synthesis and nerve cell health

Essential for protein synthesis in nervous system and neurotransmitter production Evidence B-grade 2-6 weeks

Improved immune system support

Important for immune cell function and antibody production

Required for lymphocyte proliferation and immunoglobulin synthesis Evidence B-grade 2-8 weeks

Enhanced protein synthesis

Essential building block for various proteins and enzymes

Incorporated into protein structures throughout the body Evidence A-grade 1-4 weeks

Liver function and detoxification

Supports liver metabolism and ammonia detoxification

Involved in nitrogen metabolism and ammonia disposal pathways Evidence B-grade 2-6 weeks

Cellular energy and metabolism

Supports cellular metabolism and energy production

Participates in various metabolic pathways and enzyme functions Evidence B-grade 2-4 weeks

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

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Every pair we checked

12 combinations scored by the engine
L-Asparagine + Caffeine No documented interaction either way No known interaction 70
L-Asparagine + Creatine Monohydrate No documented interaction either way No known interaction 70
L-Asparagine + Calcium Carbonate No documented interaction either way No known interaction 70
L-Asparagine + Whey Protein No documented interaction either way No known interaction 70
L-Asparagine + Lactase No documented interaction either way No known interaction 70
L-Asparagine + Bovine Collagen No documented interaction either way No known interaction 70
L-Asparagine + DHA No documented interaction either way No known interaction 70
L-Asparagine + Turmeric No documented interaction either way No known interaction 70
L-Asparagine + Fish Oil (EPA/DHA) No documented interaction either way No known interaction 70
L-Asparagine + L-Glutamine Both important for immune function and nitrogen metabolism Works better together 78
L-Asparagine + L-Aspartic Acid Asparagine can be synthesized from aspartic acid Works better together 82
L-Asparagine + Vitamin D3 B vitamins essential for amino acid metabolism Works better together 82

Dosage

With meals
Daily1-5g
Maintenance500mg-2g daily
Therapeutic2-5g daily
Immune support2-4g daily
Maximum10g daily

Before you take it

VeganYes

When to expect it

First Effects1-2 weeks for metabolic benefits
Peak Benefits4-8 weeks for sustained nervous system and immune support
Deficiency DevelopmentRare due to body synthesis and dietary sources
Toxicity OnsetVery rare, mainly digestive upset

How to measure it

$60-120
MarkerPlasma asparagine levels or nitrogen metabolism markers
Optimal40-80 μmol/L
Deficient below<30 μmol/L
FrequencyOnly if monitoring immune function or neurological health

What actually reaches you

The label counts the carrier, your body does not
Absorption Very high 95 of 100 · best absorbed form of this compound
Delivered daily 2850 mg
Cost per 100 mg delivered $0.02 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented
+
Aspartic Acid

Asparagine can be synthesized from aspartic acid

Direct metabolic relationship and conversion pathway · level A
+
B Vitamins

B vitamins essential for amino acid metabolism

Cofactors for amino acid synthesis and metabolism · level A
+
Glutamine

Both important for immune function and nitrogen metabolism

Complementary roles in immune cell support · level B

What not to take with L-Asparagine

2 documented
!
Asparaginase

Enzyme breaks down asparagine (used in cancer treatment)

Direct enzymatic degradation of asparagine · high in medical settings significance
!
Competing Amino Acids

Large doses of other amino acids may compete for absorption

Shared transport mechanisms in intestine · mild significance

Medication interactions

Discuss these with a pharmacist before combining
asparaginase Major

Cancer drug depletes asparagine levels

What to do: Medical supervision required, may need supplementation

immunosuppressants Minor

May interact with immune-modulating effects

What to do: Monitor immune function

Available forms

bioavailability compared
L-Asparagine (Free Form) 95

L-Asparagine (Free Form): Nervous system support, Immune function, Excellent safety, Protein synthesis

Food sources

before you supplement
Asparagus 2.0-2.5g per 100g · 90
Poultry 1.5-2.0g per 100g · 95
Fish 1.2-1.8g per 100g · 95
Beef 1.0-1.5g per 100g · 95
Dairy products 0.8-1.2g per 100g · 90

Too little

deficiency signs
  • Rare due to body synthesis:
  • Poor nervous system function
  • Impaired immune response
  • Reduced protein synthesis
  • Poor detoxification capacity
  • Cellular energy dysfunction
  • Nitrogen imbalance

Too much

toxicity signs
  • Excellent safety profile:
  • Mild digestive upset with large doses
  • Potential amino acid imbalance
  • Generally very well tolerated

Who benefits most

nervous-system-support

Supports neurotransmitter synthesis and nerve cell health

2-5g daily
immune-system-enhancement

Important for immune cell function and antibody production

2-4g daily
protein-synthesis-support

Essential building block for various proteins and enzymes

1-3g daily
liver-detoxification

Supports liver metabolism and ammonia detoxification

2-4g daily
general-health-maintenance

Supports overall cellular metabolism and health

1-2g daily

Where to buy it

compare forms first

Look for L-Asparagine at 1-5g per serving. The form that matters here is L-Asparagine (Free Form).

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How it works

  • Essential for protein synthesis in nervous system and immune cells
  • Required for neurotransmitter production and nerve cell function
  • Important for lymphocyte proliferation and immunoglobulin synthesis
  • Participates in nitrogen metabolism and ammonia detoxification
  • Involved in cellular energy metabolism and enzyme function
  • Critical for maintaining proper nitrogen balance

Key findings

what the evidence supports
  • Important for nervous system protein synthesis and function
  • Essential for immune cell proliferation and antibody production
  • Critical role in nitrogen metabolism and ammonia detoxification
  • Generally well-tolerated with excellent safety profile

Sources: NIH Examine.com · data reviewed 2026-08-01

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of L-Asparagine?

Documented effects: Enhanced nervous system function; Improved immune system support; Enhanced protein synthesis; Liver function and detoxification. Supports neurotransmitter synthesis and nerve cell health

How much L-Asparagine should you take per day?

The common daily range is 1-5g. By goal — maintenance: 500mg-2g daily; therapeutic: 2-5g daily; immune support: 2-4g daily; maximum: 10g daily.

When is the best time to take L-Asparagine?

With meals. First effects are typically reported within 1-2 weeks for metabolic benefits.

What are the side effects of L-Asparagine?

At excessive doses: Excellent safety profile:, Mild digestive upset with large doses, Potential amino acid imbalance, Generally very well tolerated. Safety rating at normal doses is 9 out of 10.

What should you not take with L-Asparagine?

Separate it from Asparaginase, Competing Amino Acids by two to four hours. Enzyme breaks down asparagine (used in cancer treatment)

Does L-Asparagine interact with medications?

Documented interactions with asparaginase, immunosuppressants. Discuss these with a pharmacist before combining.

How do you know if you need L-Asparagine?

The marker is Plasma asparagine levels or nitrogen metabolism markers, optimal range 40-80 μmol/L. Common deficiency signs: Rare due to body synthesis:, Poor nervous system function, Impaired immune response, Reduced protein synthesis.

Taken for

59 Immunity

Vitamin D3 · Vitamin C (Ascorbic Acid) · Comprehensive Immune Support Complex