Valine is an essential branched-chain amino acid (BCAA) needed for protein synthesis and energy metabolism. Because the body cannot make it, it must come from food or supplements.

What are the main benefits of valine?

Valine supports muscle protein synthesis and repair, and it can contribute to energy production during exercise. Adequate intake also helps support normal immune function.

How much valine should I take per day?

Supplemental amounts commonly fall around 2–5 g per day, depending on diet and training demands. Individual needs vary, and total protein intake matters.

What foods are high in valine?

Valine is found in protein-rich foods such as meat, fish, eggs, dairy, legumes, soy foods, and many nuts and seeds. Most mixed diets with adequate protein provide valine.

Is valine safe to take?

Valine is generally safe when used as directed, especially as part of dietary protein or balanced amino acid supplements. People with medical conditions or those taking medications should consult a clinician before supplementing.

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Valine

Moderate study situation·7/10

A higher score indicates better study conditions, but not necessarily effectiveness.

Valine is an essential branched-chain amino acid (BCAA) vital for muscle repair, exercise performance, and immune health.

Exercise Recovery Muscle Repair Essential Nutrient Exercise Performance Muscle Gain Immune Booster Energy Support

dose range

2–5 g

1–2 doses per day, typically around workouts.

Consumption

Take orally with or without food, commonly in combination with other BCAAs (leucine and isoleucine) in a 2:1:1 ratio.

Not fat-soluble.

Best time

Optimal benefits observed when taken pre- or post-workout.

Description

Valine is an essential amino acid and one of the three primary BCAAs, required for muscle protein synthesis, energy production during exercise, and maintenance of immune function. It is not synthesized by the body and must be acquired through diet or supplementation.

benefits

Main effects with level of evidence

Moderate

Note on evidence

The benefits are best established in exercise and muscle recovery, with emerging but less definitive evidence for immune support.

Promotes muscle growth and repair

Moderate

Valine, as part of BCAAs, supports muscle protein synthesis and may help reduce muscle breakdown and soreness after exercise.

Particularly relevant for: athletes · active individuals · aging adults

S1 · NIH Office of Dietary Supplements: Branched-Chain Amino Acids S3 · PubMed: BCAAs and Muscle Recovery S6 · Examine.com: Valine

Improves exercise performance and reduces fatigue

Moderate

Supplemental valine may help sustain energy during exercise and reduce perceived exertion or fatigue, especially in prolonged endurance activities.

Particularly relevant for: endurance athletes · active individuals

S1 · NIH Office of Dietary Supplements: Branched-Chain Amino Acids S4 · PubMed: BCAA Intake and Endurance Performance S6 · Examine.com: Valine

Supports immune function

Limited

Adequate valine intake is important for immune cell production, particularly during metabolic stress or malnutrition.

Particularly relevant for: malnourished individuals · athletes · older adults

S5 · Nutrients: BCAAs and Immune System

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

Valine is generally safe at recommended doses for healthy adults; excessive intake or use in certain metabolic conditions raises risk of adverse effects.

warning notices

Excessive valine intake (>10 g/day) may cause neurotoxicity, GI upset, and impaired coordination.
Should be avoided by those with MSUD.
Consultation needed if taking drugs affecting amino acid metabolism.
Avoid use if you have maple syrup urine disease (MSUD).
Use caution and consult a healthcare professional if taking medications that affect amino acid metabolism.
Do not exceed 10 g per day due to possible adverse neurological and GI effects.

Known interactions with medications

Corticosteroids, certain anticonvulsants, and diabetes medications may affect amino acid metabolism.

Contraindications / special precautions

Maple syrup urine disease (MSUD)

interactions

Important interactions between active ingredient ↔ supplement / medication / food

Valine may interact with certain medications and should be used with caution alongside other BCAAs or amino acid supplements.

Contraindicated in Maple Syrup Urine Disease (MSUD)

lifestyle · Maple syrup urine disease

AvoidStrong

Why

MSUD impairs valine metabolism, leading to toxic accumulation.

recommendation

Do not supplement with valine if diagnosed with MSUD.

S1 · NIH Office of Dietary Supplements: Branched-Chain Amino Acids S7 · EFSA Journal: Safety of BCAAs as a Food Supplement

Caution with medications affecting amino acid metabolism

drug · Drugs affecting amino acid metabolism

CautionLimited

Why

Such medications may alter valine levels and its clearance or effect.

recommendation

Consult healthcare provider before use.

S2 · WebMD: Valine

mechanisms of action

Brief explanations of how it works

Stimulates muscle protein synthesis

Valine activates signaling pathways involved in muscle growth and repair, especially when combined with leucine and isoleucine.

S1 · NIH Office of Dietary Supplements: Branched-Chain Amino Acids S3 · PubMed: BCAAs and Muscle Recovery S6 · Examine.com: Valine

Spares muscle glycogen and modulates central fatigue

Valine is metabolized as an energy substrate during exercise and may limit central fatigue by modulating neurotransmitter synthesis (e.g., serotonin).

S1 · NIH Office of Dietary Supplements: Branched-Chain Amino Acids S4 · PubMed: BCAA Intake and Endurance Performance