"ALA" Means Two Completely Different Ingredients — Here's How to Make Sure You're Buying the Right One

Few abbreviation collisions in the ingredient world cause as much genuine confusion as "ALA." It's used routinely for two structurally and functionally unrelated compounds — alpha-lipoic acid and 5-aminolevulinic acid — and mixing them up in a sourcing conversation isn't a hypothetical risk, it happens.

Two Completely Different Molecules

5-Aminolevulinic acid (5-ALA, CAS 106-60-5, C5H9NO3, MW 131.13 g/mol) is a non-protein amino acid and the first committed intermediate in the tetrapyrrole (porphyrin/heme and chlorophyll) biosynthetic pathway found in nearly all living cells. It has no structural or functional relationship to alpha-lipoic acid, a completely different antioxidant compound that happens to share the same common abbreviation. If your team, your supplier, or your regulatory filing uses "ALA" without the full name attached, there's real room for a costly mix-up.

How Commercial 5-ALA Is Actually Made

Commercial bulk 5-ALA is produced industrially through microbial fermentation: engineered production strains (commonly E. coli or yeast) overexpressing 5-aminolevulinic acid synthase are cultivated under controlled fed-batch conditions, and the target molecule is recovered and purified from the fermentation broth using chromatographic separation and crystallization.

A Second Detail Worth Confirming: Salt Form

Beyond the naming collision, 5-ALA itself is sold in more than one form — as the free acid (as supplied by PathGene, MW 131.13) or as more stable salt forms such as the hydrochloride (MW approximately 167.6). Since the molecular weight differs between forms, the same milligram quantity delivers a different amount of active 5-ALA depending on which form you're using. Always confirm the exact salt form, assay basis, and certificate of analysis before calculating dosage or finalizing label claims.

What to Verify Before Ordering

• Always specify "5-aminolevulinic acid" or CAS 106-60-5 in purchase orders and specifications, not just "ALA," to eliminate ambiguity with alpha-lipoic acid.
• Confirm the salt form (free acid vs. hydrochloride or other) and recalculate dosing accordingly.
• Request the batch-specific certificate of analysis, noting that assay is typically performed via HPLC with suitable derivatization given the molecule's weak native chromophore.

How PathGene Supplies This

We supply 5-aminolevulinic acid as the free acid, manufactured via fermentation and purified by chromatographic separation and crystallization. The material is freely soluble in water but sensitive to heat, light, and elevated pH, so we recommend mildly acidic aqueous formulation systems and light-protected storage and packaging. Every batch is assayed by HPLC with a certificate of analysis provided, and we're glad to confirm exact compound identity and salt form before you finalize an order.