Women age 50-plus are experienced consumers of beauty products.

Nothing gets past our inquiring minds or wallets.

Here are some top questions with practical answers from board-certified Dallas dermatologist, Rebecca Marcus, M.D.

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; chemist Ian Ginsberg, owner of famed New York City pharmacy C.O.

Bigelow; and beauty-editor me.

Which basic ingredients should I avoid mixing and matching?

Woman applying makeup in front of a small mirror on a desk

Funny, but despite new products, the same rules still apply.

Be cautious about playing DIY chemist, Ginsberg says.

Never apply vitamin C and retinol together, though both have proven pigmentation and texture benefits.

CeraVe Skin Renewing Vitamin C Serum; Sunday Riley CEO Vitamin C Rich Hydration Cream; Cetaphil Deep Hydration Healthy Glow Daily Cream; Olay Regenerist Retinol 24+ Peptide Night Moisturizer

2.Do wrinkle patches work like Botox?

Do stick-on patches mimicBotox or injectable fillers?

Sorry, but no, says dermatologist Marcus.

Estée Lauder Advanced Night Repair Concentrated Recovery Eye Mask; Pixi DetoxifEYE Depuffing Eye Patches; BioRepublic Lost Baggage Under Eye Emergency Repair Masks

Patches are a short-term, subtle fix.

Biodegradable needles that puncture the skin and promise collagen stimulation are simply not long enough to reach the dermis.

Theyd need FDA approval to do that.

Baimei Jade Roller and Gua Sha Set; Mount Lai Gua Sha Facial Lifting Tool in Rose Quartz or Jade

My beauty-editor bottom line?

Wait for more developments.

3.Can a facial massage roller lift or firm your skin?

Apparently, its how you use them to apply creams and serums that really matters.

Facial skin is delicate, especially around the eye area.