Function of Magnesium Chloride in Water-Based Serum

Based on general cosmetic formulation knowledge, Magnesium Chloride, as a salt, can serve several functions in a water-based serum:

• Viscosity Control: Salts like Magnesium Chloride can influence the thickness or thinness of water-based formulas, depending on the concentration and interaction with other ingredients like thickeners.
• Electrolyte: It can act as an electrolyte, potentially affecting the stability of the formulation.
• Skin Conditioning: Magnesium is a mineral that can have some skin benefits, although this is often a secondary function compared to its role in formulation rheology.

In summary, Magnesium Chloride is most likely added to a water-based serum to help control its texture and viscosity.