Plant cell nuclei are the storage sites for nutrients, but plant cells are protected by strong cell walls, making it difficult for general extraction techniques to reach the deeply hidden active ingredients.

The supercritical fluid state occurs when fluid temperature exceeds its critical temperature and critical pressure, existing in a state between gas and liquid. By controlling temperature and pressure, the fluid can dissolve pure natural plant compounds and selectively extract highly concentrated effective active essences. These properties enable supercritical CO2 to penetrate cell walls without obstruction, extracting every drop of effective essence without loss and preserving it in the product.