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The use of micro-capsules in cosmeceutical products has gained more interest in recent years due to the need to combine various active ingredients within one product [48]. Micro-capsulation is used to avoid incompatibility of actives, reduce ingredient odor, and to protect actives prone to oxidation by atmospheric moisture. Micro-capsules are used in the controlled delivery of multiple active ingredients, including sun filters (e.g., octyl salicylate), antioxidants (e.g., tocopherols), oils (e.g., mineral oils), fragrances, cleansing products (e.g., isopropyl palmitate), vitamins (e.g., vitamin A and D), and topical retinoids [46, 48].

Table 2. Comparison between SLNs and NLCs