This dermatologist-recommended Vitamin C serum is $40 cheaper at Walmart

There are a lot of winter boots on sale at Zappos right now. No Images? Click here     Year after year, some of the most common New Year's resolutions are about eating healthy and getting in shape. Though you're likely to be way happier if you let go of negative thoughts about your body, there's something to be said for reevaluating your daily habits. For example, co-creator of Whole30 Melissa Hartwig ditched ketchup for this healthy condiment instead. For more healthy eating inspo, check out the other kitchen hacks wellness experts swear by. Below, we've got details on all of the best MLK Day sales going on this weekend. (Pro tip: There's a bunch of NSFW V-Day toys on sale at Lelo).  XO, Brittany   Thongs v. boyshorts: Which are better for working out? Casual gym-goers might throw on the nearest pair of clean panties and call it a day, but the pros know better than to rely on any everyday ol’ undies. Wear the wrong unmentionables, and you could be looking at some serious sweat stains, panty lines, awkward chafing, wedgies or even a dreaded camel toe. To answer the age old of question of what panties you should wear the next time you’re at the gym, we asked personal trainers and other fitness fanatics to bare all in the quest for the perfect gym underwear. Check out what they had to say below. THE BEST UNDIES FOR WORKING OUT MLK Day sales to know about this weekend: Get an extra 40 percent off on-sale beauty at Anthropologie  Use code 600375 at Ulta to save $3.50 on Megababe Rosy Pits There are a lot of face masks really cheap at Urban Outfitters right now This dermatologist-recommended Vitamin C serum is $40 cheaper at Walmart than Dermstore Get an extra 40 percent off sale clothing at Anthropologie this weekend A lot of winter boots are on sale at Zappos right now Get 50 percent off everything at J.Crew Factory this weekend Get an extra 10 percent off already-on-sale styles at Asos with code ASOSSALEPLZ Get 40 percent off your purchase at Eloquii Save up to 50 percent off sitewide at Swimsuits For All A lot of cute sweaters were just added to Nordstrom's sale section Get 40 percent of already-on-sale home items at Anthropologie There's a lot of home decor up to 75 percent off at Wayfair right now Save an extra 15 percent at AllModern with code ORDERIN Get 35 percent off bedding, bath and storage at Target with code HOME Lelo has a bunch of clitoral stimulators on sale Get 25 percent off never-on-sale sex toys on Lovehoney right now Get 25 percent off one toy at Adam and Eve with code KISS25      .   V-day prep: 24 sex toys for couples that'll make your Valentine say "Be Mine" 20 punny Valentine's cards for people who are hopeless ramen-tics 18 Valentine's Day gifts for him that aren't cheesy   (HuffPost may receive a share from purchases made via links on this page.) HuffPost is now a part of Oath and a part of Verizon. On May 25, 2018 we introduced a new Oath Privacy Policy which will explain how your data is used and shared. Learn More. No moon dust. No B.S. Just a completely essential daily guide to achieving the good life. Subscribe here. Like what you see? Share it. Can't get enough? You'll also love HuffPost's Entertainment newsletter. ©2018 HuffPost | 770 Broadway, New York, NY 10003 You are receiving this email because you signed up for updates from HuffPost Feedback | Privacy Policy | Unsubscribe      .   Preferences  |  Unsubscribe