Bethenny Frankel, 54, uses this vitamin C serum daily — at $15, it's 50% off

Since we lose moisture and elasticity as we age, the humectant hyaluronic acid, an ingredient that binds to water, is key to any quality anti-aging skin care regimen. It can hold a whopping 1,000 times its weight in water.

You'd be hard-pressed to find a better hyaluronic acid serum than this award-winning version from Grace & Stella, especially while it's 50% off. 

'Tis the season for sniffles and sneezes, and if you need to check a loved one's temperature, this No. 1 bestseller makes it a cinch. Rather than getting germs all over one that goes under the tongue, simply point this one at their forehead and it'll give you a reading in moments. True to its name, it's a great option for fussy babies and kids, but can be used on adults too. At over 45% off, this is the best price we've seen it on sale for aside from Black Friday/Cyber Monday. 

"Our school used these during the Covid pandemic," shared a buyer. "We use it not only for ourselves, but we have a two-year-old grandson who can be a handful when trying to take his temperature. This works great with him. Very simple, quick and accurate."

Keep those pearly whites, well, pearly and white with this No. 1 bestselling electric toothbrush. It provides 40,000 vibrations per minute to kick plaque to the curb, and you'll get eight brush heads included — enough to last 2½ years!

At over 35% off, our price trackers tell us this within about $6 of its all-time lowest price. Be sure to check out our roundup of the best electric toothbrushes — where it was named the best overall pick — for more. 

A trusty pair of leggings belongs in every wardrobe, and these Amazon bestsellers are currently down to their lowest price of all time at over 45% off. The soft, stretchy fabric will keep you comfy all day, while the high-waisted design offers support without feeling too constricting. 

"Very comfortable and flattering," raved a repeat buyer. "I have two pairs of these amazing, silky-smooth leggings. I need like 10 more pairs because they are all I wear, since they have two pockets that hold quite a bit ... I'm so happy to finally have pants that make me feel and look good while also being able to hold my phone, keys and other items easily!"

I don't know who Leslie is, but she must be a champion of foot comfort, given the fact that an ultra-cushy slipper was named after her. Memory foam insoles provide a soft yet supportive feel, and heel and arch cushioning adds to the plushness. They just might become your go-to house shoes — and there's no reason to have cold feet about this purchase. At nearly 60% off, this is as low as they get!

You love the look of sheer tights, but when the temps plummet, you want to keep those gams more covered up. What to do? Don these sneaky tights, which give off the appearance of transparent stockings, but are actually lined with fleece to keep your legs nice and toasty. Add 'em to your cart while they're close to an all-time low. 

This is an Amazon No. 1 bestseller because it's just such a darn good product. Is this the lowest we've ever seen it for? No. But at 40% off, it's still a great deal for something that'll save your clothes when your toiletry bottles stage a mutiny. Even better, it's a space-saver when you've checked into your hotel or Airbnb and find out your only counter space is a pedestal sink. 

Instead of digging through a jumbled pouch or scattering your stuff across the back of the toilet, you just unzip, hang it up, and everything's right there nestled in clear, TSA-compliant pouches for you to see. It has multiple compartments to keep things organized and a hook that keeps it hung and out of the way.

Time to ditch the dreaded string: This gentle yet effective gum de-gunker allows you to feel the sparkle every day, thanks to its pressurized water-flossing technology. It's loved by dentists and shoppers alike (more than 100,000 at Amazon) and promises to get your teeth clean and gums flossed — even those hard-to-reach back teeth. 

At 40% off, this is one of the best prices I've seen all year; it rarely dips lower outside of Prime Day and Black Friday. 

This serum contains a high concentration of Vitamin C along with tripeptides and green tea extract to help restore skin to its youthful, glowy best. It has quite a few fans too, including Bethenny Frankel, who's raved about it on social media a few times. 

"I don't drink my orange juice, but I put vitamin C serum on every day," she said. "It's great for year-round daytime [wear], a facialist told me that ... [it's] hydrating, plumping, brightening."