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What is the difference between Type A and Type B gelatin?
Beyond Biopharma · Edible Gelatin FAQ
Short answer: The core difference is the extraction route. Type A gelatin is acid-processed and typically made from porcine pig skin, fish skin or some cattle hides; the short acid soak makes its isoelectric point higher, around pH 7–9. Type B gelatin is lime/alkaline-processed and typically made from bovine hide and bone; the weeks-long alkaline treatment lowers its isoelectric point to about pH 4.7–5.4. So the two differ in processing time, in the usual raw-material source, and most importantly in electrical charge behaviour at a given pH. Bloom strength and viscosity overlap fully between the types, so neither is inherently firmer or better.
The two letters mean two processes
Type A and Type B come from the food industry’s shorthand for how collagen was hydrolysed. Type A = acid extraction. Raw material is swollen in acid and then hot-water extracted, a comparatively fast route that suits pig skin especially. Type B = lime/alkaline extraction. The material soaks in a lime bath for weeks before extraction, a slower route that suits the dense collagen of bovine hide and bone. The process broadly follows the raw material: it would be wasteful to force dense beef bone through a short acid soak, and unnecessary to lime-treat soft pig skin for weeks.
Head-to-head comparison table
| Feature | Type A gelatin | Type B gelatin |
|---|---|---|
| Extraction route | Acid | Lime / alkaline |
| Typical raw material | Porcine skin; also fish skin, some cattle hides | Bovine hide and bone |
| Processing time | Short (hours to a couple of days) | Long (several weeks) |
| Isoelectric point (pI) | ~pH 7–9 (higher) | ~pH 4.7–5.4 (lower) |
| Net charge at acidic pH | Positive (above its pI range it flips sooner) | More negative character persists lower |
| Bloom strength range | Broad; overlaps Type B | Broad; overlaps Type A |
| Viscosity range | Broad; overlaps Type B | Broad; overlaps Type A |
| Religious fit | Porcine → not halal/kosher; fish/hide variants differ | Bovine typically fits halal/kosher with certified slaughter |
Why the isoelectric point matters most
At the level of a finished product the most consequential difference is the isoelectric point, because it controls electric charge at the serving pH. Type A, with a pI in the pH 7–9 range, carries little or no net negative charge in most foods until you climb above roughly neutral. Type B, with a lower pI of about pH 4.7–5.4, already carries a net negative charge in neutral and even mildly acidic foods. Where a gelatin must flocculate, stabilise or avoid clashing with another charged colloid, this one number — not the letter on the bag — drives behaviour. A formulator working with acidic beverages or protein-rich dairy drinks will therefore treat Type A and Type B as different tools.
What is not different
It is worth correcting a common assumption: type does not set gel strength. Two gelatins of identical Bloom, one Type A and one Type B, set gels of nearly the same firmness and melt on warming in the same reversible way. Neither type is “stronger” as a rule — the Bloom figure on the COA, not the letter, carries that information. Likewise clarity, odour and off-taste are properties of the individual grade and its refining, not of the A or B designation alone.
Fitting the choice to the recipe
- In plain desserts, marshmallows and standard gummies at neutral pH, either type can work; pick on Bloom, cost and source constraint.
- In acidic beverages and tangy dairy or protein drinks, the charge difference becomes real — test both against your emulsion or suspension.
- When halal or kosher certification is mandatory, the practical question usually collapses to bovine Type B versus a suitable Source Type A (fish), because porcine Type A will not be accepted.
To confirm which route and charge profile best fit your system, talk to a supplier with the full COA in hand — the letter alone never replaces the specification. For help framing which to choose, read is Type A or Type B “better”, or start from what Type A is and what Type B is.
