Method for treating a large number of meat products, in particular slaughtered poultry or parts thereof, in which an additive is added to the meat products. The meat products are supplied to additive-adding means using a conveyor means, the conveyor means being designed to feed the meat products sequentially in groups or separately. The additive-adding means subject each meat product or each group of meat products to an additive-adding treatment which is adapted to the corresponding meat product or to the corresponding group of meant products.