Unlike creams that sit on the surface, a serum penetrates deeper, making it more effective for targeted concerns like hyperpigmentation, tanning, and uneven skin texture
Frater, J., Lie, D., Bartlett, P., & McGrath, J
Pucciarelli, G., Mastursi, M., Latte, S., Sacra, C., Setaro, A., Lizzadro, A., and Nolfe, G
Sources Endogenous biosynthesis R -lipoic acid is synthesized endogenously by humans (see Metabolism and Bioavailability)
The columns cover availability, stated purity, testing, form, who can order, and the best use for each