A method for dosing a product in liquid form in containers (100) comprising transferring doses of product (20) by means of a dosing unit (2) from a feed tank (3) in the containers (100), each dose comprising a pre-established quantity of product; during said transferring, controlling through a bubble sensor (10) the doses of product (20) which flow out from the feed tank (3) through the dosing unit (2) up to the containers (100) to detect the presence of gas bubbles (21) and measure a volume of the gas bubbles (21) in each dose of product (20); delivering the doses of product (20) inside the containers (100); measuring in a weighing station (16) through a weight sensor (22) a weight of the doses of product (20) dosed in said containers (100); arranging a processing and control unit (30) set up to receive and process a weight signal of the weight sensor (22) and a bubbles signal (21) from the bubble sensor (10), said processing and control unit (30) being connected to the dosing unit (2) in order to modify the pre-established quantity of product supplied for each dose of product (20) as a function of the weight signal received by the weight sensor (22); the processing and control unit (30) is further set up to inhibit to modify the pre-established quantity of product supplied for each product dose (20) as a function of the weight signalreceived by the weight sensor (22), in case the bubble sensor (20) detects a volume of gas bubbles (21) in the doses of product (20) that is lower than a predefined reference value.