One of the components of SibXP®Complex is a cellular fir sap, which is 100% intracellular sap, squeezed from freshly harvested conifer needles. As neither water nor any other solvents are used in the production, the concentration of biologically active substances in the cellular sap is very high. So it is absolutely unnecessary to use any artificial stabilizers or preservatives. Maltol acts as the main protector of the cell sap from any possible environmental damage as it is a potent natural antioxidant that does not allow any acidification, thus the complex is free from fermentation, going bad or turning sour. Polyprenols that are also part of the formula have a strong protective effect as well.