Where does this fit in a skincare routine, and can it be used with other serums or creams?

Apply it after cleansing and before heavier moisturizers or night creams. As an oil-based serum, it works best as one of the later steps in your routine — after any water-based serums, which should always be applied first to damp skin. It layers well under moisturizing creams and has been used successfully alongside other Reviva formulas. For morning use, apply before sunscreen. For evening use, it pairs well with a nourishing night cream applied on top. Bakuchiol does not cause photosensitivity the way retinol does, so morning use is safe — though sun protection is always recommended regardless.