Fuente: WIPO "tomato" Provided herein is a system to prepare a natural product. The system can include a vessel to include a natural product including a concentration of an acid. The system can include a first sensor to determine the natural product that includes the concentration of the acid has a first pH within a range of 0 to 3. The system can include a fluid transfer tool to add a base to the natural product that includes the concentration of the acid. The system can include at least one of the first sensor or a second sensor to determine the natural product that includes the concentration of the acid and that includes the concentration of the base has a second pH within a range of 4 to 9.