ALANINE

📋 Quick facts

Description: ALANINE — amino acid, part of the skin natural moisturizing factor (NMF).

All Functions: amino acid, part of the skin natural moisturizing factor (NMF)

Quick Facts:

• Category: humectant

Proven Benefits At A Glance:

• β-alanine is a naturally occurring amino acid found in nature
• Your body uses β-alanine to make carnosine, a compound that helps muscles maintain proper pH balance
• β-alanine is synthesized in your liver and combines with histidine to form carnosine, which accumulates in muscles and brain tissue
• Since your body typically has more histidine than β-alanine, you need dietary sources to support carnosine production
• A derivative called N-acetyl-L-alanine showed promise in reducing eczema-like symptoms in a mouse model of atopic dermatitis
• β-alanine has been studied as a treatment for aquagenic pruritus, a rare water-triggered itching condition

⚗️ Chemical Overview

Alanine is an alpha-amino acid that consists of propionic acid bearing an amino substituent at position 2. It has a role as a fundamental metabolite. It is functionally related to a propionic acid. It is a conjugate base of an alaninium. It is a conjugate acid of an alaninate. It is a tautomer of an alanine zwitterion. DL-alanine has been reported in Homo sapiens, Juncus effusus, and Caenorhabditis elegans with data available. DL-Alanine is a racemic mixture of alanine, a non-essential alpha-amino acid. Alanine is one of the most common residues for protein synthesis and is involved in the metabolism of tryptophan and vitamin pyridoxine. Furthermore, alanine is an important source of energy for muscles and central nervous system. It strengthens the immune system, helps in the metabolism of sugars and organic acids, and displays a cholesterol-reducing effect in animals.

Source(s): NCI Thesaurus (NCIt), LOTUS – the natural products occurrence database, ChEBI, via PubChem

📊 Comedogenicity

🛡️ Safety rating

Safety tier is a starting heuristic from regulatory status and comedogenic rating, not a dermatological verdict — see our Terms for the full disclaimer. Research confidence reflects how many real cited studies back this ingredient, not the strength of their findings.

🌍 Regulatory Status

💧 Skin Type Compatibility

⚠️ Don’t Combine With

📚 Research & Evidence

🔬 The Science

β-alanine is classified as a non-proteinogenic amino acid, meaning it isn’t one of the 20 standard amino acids that build proteins in your body. Instead, it plays specialized roles in metabolism and tissue health. #1: Carnosine production and muscle health (Curr Med Chem, 2025): β-alanine’s primary consumer-facing relevance comes from its role as a building block of carnosine. When β-alanine combines with the amino acid histidine in your liver, it forms carnosine, which then accumulates in muscle and brain tissues. Carnosine acts as a pH buffer—it helps maintain the chemical balance inside muscle cells, and this buffering capacity naturally declines with age due to both reduced carnosine levels and a condition called sarcopenia (age-related muscle loss).

#2: Antioxidant and anti-aging mechanisms (Curr Med Chem, 2025): The carnosine made from β-alanine exhibits antioxidant properties through two pathways: it scavenges reactive oxygen species (ROS—unstable molecules that damage cells) and chelates metal ions (binds to them, neutralizing their harmful effects). Additionally, carnosine acts as an antiglycation agent, meaning it reduces abnormal bonding between proteins and sugars, a process linked to degenerative diseases. The same source notes that carnosine has anti-inflammatory effects in autoimmune conditions like osteoarthritis and suggests β-alanine may help prevent skin aging, intestinal damage, and age-related cognitive decline, though these claims appear in a review article rather than controlled trials.

#3: Topical skin condition research (BMB Rep, 2025): In a mouse model of atopic dermatitis (eczema-like condition), N-acetyl-L-alanine—a chemical derivative of L-alanine—markedly reduced skin lesions when applied topically. This treatment also suppressed infiltration of immune cells (eosinophils and mast cells), prevented elevation of IgE antibodies, and shifted immune signaling away from Th2 (allergic/inflammatory) toward Th1 (anti-inflammatory) pathways. However, this was a mouse study; human efficacy remains unproven. #4: Rare skin condition case report (Case Rep Dermatol, 2025): One published case describes successful oral β-alanine treatment for aquagenic pruritus, a rare condition causing intense itching triggered by water exposure. Treatment benefits persisted at 20-week follow-up, but this is a single case report rather than a controlled trial.

#5: Safety and dietary necessity (Curr Med Chem, 2025): Because your body synthesizes β-alanine in the liver but typically produces less than you need for optimal carnosine levels (since histidine is usually more abundant), dietary sources are considered important. A toxicity study of a tripeptide containing alanine (among other amino acids) found no adverse effects at high doses in rats (J Appl Toxicol, 2023), suggesting amino acids containing alanine are well-tolerated, though this doesn’t specifically address β-alanine supplementation in humans.

📄 Related Research

Matched by search — not necessarily verified support for every statement above.

• Song P et al. (2023). Advances in the synthesis of β-alanine. Front Bioeng Biotechnol.
• Gasmi A et al. (2025). The Possible Roles of β-alanine and L-carnosine in Anti-aging. Curr Med Chem.
• Dunn M et al. (2023). A 90-day toxicity study of tripeptide, arginine-alanine-lysine. J Appl Toxicol.
• Alinaghi F et al. (2025). Primary Aquagenic Pruritus Successfully Treated by β-Alanine: A Case Report. Case Rep Dermatol.
• TSogt U et al. (2025). N-acetyl-L-alanine ameliorates atopic dermatitis-like symptoms by suppressing Th2 differentiation in DNFB-induced NC/Nga mice. BMB Rep.

🧴 Products Containing ALANINE

• Eucerin UreaRepair PLUS 10%
• Seba Med Seifenfreies Waschstück
• sebamed Flüssig-Wasch-Emulsion
• BCL Kansosan Skincare Moisture Base AQ
• RETINOL RETINOL SKIN CREAM
• MyProtein Hair & body wash
• Bioélixire Odżywka do włosów zniszczonych
• today, today med Waschlotion (für empfindliche Haut)
• Tío Nacho Tío Nacho Anti-Caida Engrosador
• moisture therapy lip balm
• Eucerin Advanced Repair Cream
• Eucerin Eucerin, Roughness Relief Lotion, Fragrance Free
• Eucerin Advanced Repair Hand Cream
• Eucerin
• marc anthony argan shampoo
• Avant Skincare Gentle Rose Beautifying Face Exfoliant
• Pacifica Cosmic Hemp Balancing Face Wash
• NIOD Multi-Molecular Hyaluronic Complex (MMHC2)
• The Ordinary The Ordinary Glycolic Acid 7% Toning Solution (Solução tonificante de ácido glicólico 7%)
• ordinary suncream
• dr groot shampoo
• Paul Mitchell Paul Mitchell Awapuhi Shampoo
• collagen face mask
• OPLAPLEX Leave In – Numéro 5
• Sephora Beauty insider
• Avon Moisture Therapy Intense Healing
• Olaplex No. 8 Bond Intense Moisture Mask
• FILORGA TIME-FILLER Crème Absolue Correction Rides
• CeraVe Hydrating cream-to-foam cleanser
• Filorga Filorga Hydra Filler 50ML
• OREAL PROFESSIONNEL SHAMPOOING ECLAT POUR CHEVEUX GRIS
• Garnier miel mask
• CeraVe Hyrdrating Cream To Foam Cleanser
• Davines Davines MOMO Moisturizing Shampoo
• Eucerin Urea Repair
• Urea Repair
• Dm Fuss Vital-Bad
• SebaMed Seifenfreies Waschstück
• sebamed sebamed Frische Dusche
• Maro Deo Scalp Medicated Shampoo