That's right, the metal most closely associated with pennies can actually help you look younger. Copper has actually been used in beauty regimes for centuries — all the way back to ancient Egypt — and was considered a symbol for eternal youth back in the day.

Collagen supplements have reached height popularity. The powdery stuff is being mixed into cookie recipes, poured into your morning cuppa and incorporated into daily multivitamins. Even Sephora has jars of collagen supplements stocked on its beauty shelves. Curious about the efficacy of orally ingested collagen, we reached out to dermatologists for some expert guidance on whether it's worth adding to your regimen. Spoiler: current scientific literature points to "meh."

Holiday travel season is upon us, which means that you have to condense your whole life into bags small enough to make the journey via planes, trains and automobiles. Even the most practiced travel pro can't help but get a little freaked out about packing a skin care regimen for the trip: exactly what of all your beauty loot is critical enough to make the trip?

As someone who has done a lot of interviews with celebrity hairstylists (so many interviews), I can attest that there are a ton of products involved in the looks that strut down the runway or show up in magazine shoots and red carpet moments. I can also tell you that every single stylist has one product in their kit that they would sooner stay home than show up to a set or location without. It's pretty much their secret weapon.

You order practically everything else from Amazon, so why not skin care? After all, many of your favorite moisturizers and cleansers probably cost a pretty penny elsewhere. If you aren't exactly sure about what kind of essentials you should stock up on, we spoke to some experts about all of the best serums, sunscreens and hydrating creams you can find on Amazon for a pretty good price. Below are 10 skin care steals you should add to your cart the next time you're stocking up on supplies.