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L-Alanine

Non-essential amino acid important for glucose metabolism, energy production, and immune system support

Scientific nameL-Alanine FormulaC3H7NO2 Molecular weight89.09 g/mol CAS56-41-7
95 absorption score
9 safety / 10
12 USD per month
5 documented interactions

Check it against something

Evidence level B

L-Alanine with:

Compatibility score 78 out of 100
78 out of 100
Works better together Compatible. Timing differs, so follow each supplement's own window.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Enhanced glucose metabolism and regulation

Supports glucose-alanine cycle and blood sugar stability

Key component of glucose-alanine cycle for glucose homeostasis Evidence A-grade 1-2 weeks

Improved muscle energy and endurance

Provides energy substrate for muscle tissue during exercise

Converts to pyruvate for energy production in muscle cells Evidence B-grade 2-4 weeks

Enhanced immune system function

Supports immune cell energy and lymphocyte function

Essential amino acid for immune cell protein synthesis Evidence B-grade 2-6 weeks

Protein synthesis support

Important building block for various proteins and enzymes

Incorporated into protein structures and enzyme active sites Evidence A-grade 2-8 weeks

Liver function and detoxification

Supports liver metabolism and detoxification processes

Substrate for liver enzymes and glucose production Evidence B-grade 2-6 weeks

Others take these for the same thing

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

Creatine Monohydrate Strength & power enhancement 3-5g A 95% Calcium Bone health & muscle function 1,000-1,200 mg A 30% Ashwagandha Stress management & energy 300-600mg A 75% Magnesium Glycinate Superior absorption sleep & muscle support 200-600 mg A 90% Vitamin B12 (Cyanocobalamin) Energy & nerve support 250-1000 mcg A 70% Coenzyme Q10 (CoQ10) Heart health & cellular energy 100-200mg A 10%

Every pair we checked

12 combinations scored by the engine
L-Alanine + Berberine for Advanced Glucose Control and Metabolic Support High glucose may reduce alanine's glucose regulation benefits Needs attention 58
L-Alanine + Caffeine No documented interaction either way No known interaction 70
L-Alanine + Creatine Monohydrate No documented interaction either way No known interaction 70
L-Alanine + Calcium Carbonate No documented interaction either way No known interaction 70
L-Alanine + Whey Protein No documented interaction either way No known interaction 70
L-Alanine + Lactase No documented interaction either way No known interaction 70
L-Alanine + Bovine Collagen No documented interaction either way No known interaction 70
L-Alanine + DHA No documented interaction either way No known interaction 70
L-Alanine + Turmeric No documented interaction either way No known interaction 70
L-Alanine + L-Glutamine Both important for muscle metabolism and immune function Works better together 78
L-Alanine + BCAA (Branched-Chain Amino Acids) Branched-chain amino acids work with alanine for muscle energy Works better together 78
L-Alanine + Vitamin D3 B vitamins essential for amino acid metabolism Works better together 82

Dosage

With meals
Daily2-6g
Maintenance1-3g daily
Therapeutic3-6g daily
Athletic performance5-10g daily
Maximum15g daily

Before you take it

VeganYes

When to expect it

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

How to measure it

$50-100
MarkerPlasma alanine levels or glucose tolerance tests
Optimal200-500 μmol/L
Deficient below<150 μmol/L
FrequencyOnly if monitoring metabolic health or muscle function

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 3800 mg
Cost per 100 mg delivered $0.01 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented
+
Glutamine

Both important for muscle metabolism and immune function

Complementary roles in muscle protein and energy metabolism · level B
+
Bcaa

Branched-chain amino acids work with alanine for muscle energy

Complementary amino acid metabolism pathways · level B
+
B Vitamins

B vitamins essential for amino acid metabolism

Cofactors for amino acid transamination reactions · level A

What not to take with L-Alanine

2 documented
!
Excess Glucose

High glucose may reduce alanine's glucose regulation benefits

Competing pathways in glucose metabolism · mild 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
diabetes-medications Minor

May affect glucose metabolism

What to do: Monitor blood glucose levels

insulin Minor

May influence glucose regulation

What to do: Monitor blood sugar when starting supplementation

Available forms

bioavailability compared
L-Alanine (Free Form) 95

L-Alanine (Free Form): Glucose regulation, Muscle energy, Excellent safety, Affordable

Food sources

before you supplement
Chicken breast 1.2-1.5g per 100g · 95
Turkey 1.1-1.4g per 100g · 95
Beef 1.0-1.3g per 100g · 95
Fish (salmon) 1.0-1.2g per 100g · 95
Eggs 0.8-1.0g per 100g · 95

Too little

deficiency signs
  • Rare due to body synthesis:
  • Poor glucose regulation
  • Muscle weakness and fatigue
  • Impaired immune function
  • Poor exercise tolerance
  • Muscle protein breakdown
  • Metabolic dysfunction

Too much

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

Who benefits most

athletes-endurance-training

Supports muscle energy and glucose metabolism during exercise

3-6g daily
glucose-metabolism-support

Helps with glucose regulation and metabolic health

2-5g daily
immune-system-support

Provides amino acid support for immune cell function

2-4g daily
muscle-preservation

Helps maintain muscle protein during periods of stress

3-5g daily
liver-support

Supports liver metabolism and detoxification processes

2-4g daily

Where to buy it

compare forms first

Look for L-Alanine at 2-6g per serving. The form that matters here is L-Alanine (Free Form).

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How it works

  • Central component of glucose-alanine cycle for glucose homeostasis
  • Converts to pyruvate for cellular energy production
  • Essential amino acid for protein synthesis in muscle and immune cells
  • Facilitates nitrogen transport from muscle to liver
  • Substrate for gluconeogenesis during fasting or exercise
  • Important for maintaining muscle protein balance

Key findings

what the evidence supports
  • Important component of glucose-alanine cycle for glucose homeostasis
  • Supports muscle energy metabolism during exercise and fasting
  • Essential amino acid for protein synthesis and immune function
  • 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-Alanine?

Documented effects: Enhanced glucose metabolism and regulation; Improved muscle energy and endurance; Enhanced immune system function; Protein synthesis support. Supports glucose-alanine cycle and blood sugar stability

How much L-Alanine should you take per day?

The common daily range is 2-6g. By goal — maintenance: 1-3g daily; therapeutic: 3-6g daily; athletic performance: 5-10g daily; maximum: 15g daily.

When is the best time to take L-Alanine?

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

What are the side effects of L-Alanine?

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-Alanine?

Separate it from Excess Glucose, Competing Amino Acids by two to four hours. High glucose may reduce alanine's glucose regulation benefits

Does L-Alanine interact with medications?

Documented interactions with diabetes-medications, insulin. Discuss these with a pharmacist before combining.

How do you know if you need L-Alanine?

The marker is Plasma alanine levels or glucose tolerance tests, optimal range 200-500 μmol/L. Common deficiency signs: Rare due to body synthesis:, Poor glucose regulation, Muscle weakness and fatigue, Impaired immune function.

Taken for

62 Energy & Metabolism

Vitamin B12 (Methylcobalamin) · Ashwagandha · Vitamin B12 (Cyanocobalamin)

 43 Performance

Caffeine · Creatine Monohydrate · Whey Protein