What are 'A1' and 'A2' types of milk? And why is FSSAI against them?

The FSSAI has mandated food businesses and e-commerce platforms to remove 'A1' and 'A2' milk product labels, terming them misleading and non-compliant. Companies have six months to comply. This move is welcomed by Parag Milk Foods' Chairman, who called the differentiation a marketing gimmick and emphasized clearer consumer information.