Regenacalm Serum PRO by facetheory is a multifunctional and versatile skincare product that balances powerful ingredients with soothing botanicals. Cynthia, the reviewer, highlights its gentle formula, which is suitable even for sensitive skin. The serum effectively soothes, hydrates, and treats the skin, taking skincare treatments to the next level. Cynthia recommends allowing the serum to shine by going gentle on the rest of your routine. Overall, Regenacalm Serum PRO offers a powerful yet gentle solution for those looking to enhance their skincare regimen. Its ability to soothe, hydrate, and treat the skin makes it a standout product.