Beta-Alanine
Pronunciation: pronunciation varies by local usage.
- Generic name
- beta-alanine
- Brand names
- CarnoSyn
- Drug class
- Non-essential amino acid dietary supplement
- Route
- Oral
- Legal status
- Over-the-counter dietary supplement (not an FDA-approved drug)
Availability and supply rules vary by country
Trade names by country: United States
Australia: · Full directory
What beta-alanine is and how it works
Beta-alanine is a non-essential amino acid sold as a dietary supplement. It is not an FDA-approved drug. (1) (2)
It is commonly used to improve physical performance, especially during high-intensity exercise. Research results are mixed; not all studies show benefit. Evidence for menopausal hot flashes is insufficient. Consult a healthcare provider before use, especially if pregnant, breastfeeding, or taking other medications.
Mechanism of action: how beta-alanine works
Beta-alanine is a non-essential amino acid that, when supplemented, increases muscle carnosine levels. (1) (2)
What beta-alanine is used for
Physical performance
Some research shows that taking beta-alanine modestly improves some measures of physical performance, especially during high-intensity exercise and strength training. May help delay muscle fatigue in older adults. Results are described as mixed due to variability in study design and dosing. Research has used 3.2–6.4 grams daily of a specific proprietary product (CarnoSyn). Meaningful increases in muscle carnosine levels require daily supplementation for at least four weeks. (1) (2)
Hot flashes (menopausal)
Early research suggests beta-alanine is less effective than the prescription drug veralipride for reducing hot flashes. Evidence is rated Insufficient; this use is not established. Do not use beta-alanine as a treatment for hot flashes without clinician evaluation. (1)
Before taking beta-alanine
Do not take / not appropriate for
- If you are allergic to beta-alanine or any ingredients in a product, discuss with a healthcare provider before use. Specific allergens were not identified in reviewed sources. (all products) (2)
- If you are pregnant or breastfeeding, discuss with a healthcare provider before using beta-alanine; the reviewed sources advise against use in this situation because safety has not been established. (all products) (1) (2)
Tell your clinician about
- If you are pregnant, planning pregnancy, or breastfeeding.
- Any known allergies.
- All medications you take, because interactions with beta-alanine are not fully understood.
- Any symptoms of severe allergic reaction (breathing difficulty, swelling, hives, etc.) after taking beta-alanine.
How to take beta-alanine
- Beta-alanine is taken orally as a dietary supplement. Research studies have used 3.2 to 6.4 grams daily of a specific product (CarnoSyn) — this is a research-only figure, not a recommended dose for general use, and no universal dose is established for all beta-alanine products.
- If you experience paresthesia (tingling), ask a healthcare provider or pharmacist about dosing approaches for your specific product.
- Whether doses above the studied research range are safe was not established in the sources reviewed; discuss appropriate dosing with a healthcare provider.
- Meaningful increases in muscle carnosine require daily supplementation for at least four weeks.
Procedures and treatment changes
Tell the treating team before surgery, procedures, or any medicine change. Do not alter treatment without the responsible clinician. (1) (2)
Missed dose
Consult your healthcare provider for individualized advice.
Overdose
If you suspect an overdose, contact emergency services or a poison control center immediately. No specific toxic dose has been established. Severe allergic reactions require immediate medical attention. (2)
Side effects
The most common side effect is paresthesia (tingling, prickling, stinging, or burning sensation), which is more likely at higher doses. Short-term use is rated Possibly Safe.
Paresthesia and flushing
What to notice: A tingling, prickling, stinging, or burning feeling, often on the face, neck, hands, or chest, which typically resolves without intervention. Flushing may also occur at higher doses; whether flushing resolves without intervention was not established in the sources reviewed.
What to do: If bothersome, seek advice from a healthcare provider or pharmacist about dosing for your specific product. (1) (2)
Severe allergic reaction
What to notice: Breathing problems or wheezing; racing heart; swelling of the face, lips, mouth, tongue, or throat; trouble swallowing or throat tightness; hives (red, pink, white, or brown bumps); nausea; vomiting; dizziness; fainting; stomach cramps; joint pain.
What to do: Seek emergency medical attention immediately. (2)
Serious warnings
Severe allergic reaction (anaphylaxis) — emergency
Symptoms: Breathing problems or wheezing; racing heart; swelling of the face, lips, mouth, tongue, or throat; trouble swallowing or throat tightness; hives; nausea; vomiting; dizziness; fainting; stomach cramps; joint pain.
Action: Call emergency services immediately. Do not delay. (2)
Interactions
| Medicine or test | Effect | Action |
|---|---|---|
| Medications | The interactions between beta-alanine and medicines are not fully understood or researched. | Consult your healthcare provider before taking beta-alanine if you use any medications. (2) |
Pregnancy, breastfeeding, kidney/liver function, age
Pregnancy
There is not enough reliable information about the safety of beta-alanine during pregnancy. Discuss with a healthcare provider before use; the reviewed sources advise against use in this situation. (1) (2)
Breastfeeding
Safety during breastfeeding is unknown; whether beta-alanine transfers into breast milk is not established. Discuss with a healthcare provider before use; the reviewed sources advise against use in this situation. (1) (2)
Monitoring
Before starting
- Consult a healthcare provider to ensure beta-alanine is appropriate for your health status and goals.
- Discuss all medications and supplements you are taking due to unknown interaction potential.
- Tell your healthcare provider about any known allergies to beta-alanine or product ingredients.
During treatment
- Monitor for paresthesia; if bothersome, seek advice from a healthcare provider or pharmacist about dosing for your specific product.
- Seek immediate medical attention for any symptoms of severe allergic reaction (breathing difficulty, swelling, hives, etc.).
- Meaningful increases in muscle carnosine require at least four weeks of daily supplementation; whether effectiveness should be specifically reassessed at that point was not established in the sources reviewed.
Storage
Follow the exact product label and keep medicines away from children.
Professional information
Clinician-facing context only. Beta-alanine is a dietary supplement, not an FDA-approved drug. Evidence for use is limited and mixed. Any recommended doses are based on research studies using a specific product (CarnoSyn).
All regions
Indication: Physical performance
Dose summary: Research has used 3.2–6.4 grams daily of a proprietary product (CarnoSyn), a research-only figure, not a recommended dose for general use. No universal dose is established for all beta-alanine products, and whether this specific research range was administered in divided doses was not established in the sources reviewed. Ask a healthcare provider or pharmacist about dosing approaches for your specific product. Meaningful increases in muscle carnosine levels require at least 4 weeks of daily supplementation.
Renal context: No renal impairment-specific guidance available in reviewed sources. (1) (2)
Hepatic guidance
No hepatic impairment-specific guidance available in reviewed sources.
Overdose note
Direct suspected-overdose cases to emergency services or a poison control center. (1) (2)
Frequently asked questions
What is the most common side effect of beta-alanine?
Paresthesia (tingling, prickling, stinging, or burning sensation) is common, especially at higher doses. It often affects the face, neck, hands, or chest and typically resolves without intervention. If bothersome, ask a healthcare provider or pharmacist about dosing for your specific product. (1) (2)
Can I take beta-alanine if I'm pregnant or breastfeeding?
Safety during pregnancy and breastfeeding is unknown. The reviewed sources advise against use in this situation. Discuss with a healthcare provider before use. (1) (2)
Will beta-alanine interact with my medications?
Interactions are not well understood. Always consult your healthcare provider before taking beta-alanine if you use any medications, including prescription, over-the-counter, or herbal products. (2)
How much beta-alanine should I take?
Doses studied in research have ranged from 3.2 to 6.4 grams daily of a specific product (CarnoSyn). Do not self-prescribe; seek clinician advice for appropriate dosing based on your needs and the specific product you use. (1)
What is the mechanism of action of beta-alanine?
Beta-alanine is a non-essential amino acid that, when supplemented, increases muscle carnosine levels. (1) (2)
References
- Beta-alanine: Health Benefits, Side Effects, Uses, Dose & PrecautionsRxList · International · accessed 2026-08-06 · source 1
- Beta-Alanine: Overview, Uses, Side Effects, Precautions, Interactions, Dosing and ReviewsWebMD · International · accessed 2026-08-06 · source 2
- beta-alanine — RxNorm normalized drug concept (RXCUI 61)U.S. National Library of Medicine (RxNorm) · US · accessed 2026-08-14 · source 3
Brand names by country
Single-ingredient beta-alanine names are shown separately by country. Product availability, strengths, and supply rules can change; combination products are not included here.
Priority countries
United States
- NutraBioNutraBio
- ANSI Advanced Nutrient ScienceANSI Advanced Nutrient Science
- BulkSupplements.comBulkSupplements.com
- ANSI Advanced Nutrient Science IntlANSI Advanced Nutrient Science Intl
- MET-RxMET-Rx
- Hard RhinoHard Rhino
- ProlabProlab
- GNC Pro PerformanceGNC Pro Performance
- ON Optimum NutritionON Optimum Nutrition
- Muscle EmpireMuscle Empire