The full answer
The source and manufacturing process of gelatin matter.
Consumers should not simply assume ordinary gelatin is Halal.
The easiest consumer approach is to choose a product that has been properly Halal-certified or whose gelatin source has been reliably verified.
Shariah Board has detailed guidance on transformation and gelatin production.
Answers in the Halal Knowledge Center reflect the standards followed by Halal Monitoring Services (HMS), which operates as part of the Shariah Board of America. HMS certifies only what it checks.