"Better" is subjective. As a brand that makes products using lactobionic acid, we of course stand by our decision that lactobionic acid is the more superior PHA based on our research and branding philosophies.
Lactobionic acid is twice as more hydrating, a better barrier repairer, a stronger antioxidant, and a more gentle acid than gluconolactone. Both lactobionic acid and gluconolactone have a 1 step conversation to the active gluconic acid for them to work, so the strengths of both PHAs do not differ much.
The raw material of lactobionic acid is pricier than gluconolactone, so even if a brand does include LBA in its product, you will often see the concentration is low or combined with gluconolactone to make a higher concentration claim.
Instead of shopping for products based on a single ingredient, we suggest looking at the overall formulation and choosing products based on your skin needs :).
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