Q1: Can it be layered under moisturiser and SPF?
Yes. Apply serum first on clean skin, allow to absorb, then apply moisturiser and SPF.
Q2: Is it only for people over 40?
It is targeted at 40+ skin, but can also benefit younger users with early fine lines or dullness.
Q3: Can it replace injectables?
No. It is a high-performance topical serum, not a filler. It enhances texture and tone but does not provide volume.