(Tighten your tummy and tone every inch in just minutes a day with these exclusive ballet-inspired routines from Prevention’s Flat Belly Barre!) “While cost and quality aren’t always directly related with skincare, ingredient quality correlates with results, so the better the ingredients, the better your results will be,” says Noelle Sherber, MD, a board-certified dermatologist in Washington, DC. Here are six kinds of beauty products that are worth the extra coin, and five you can feel good about skimping on.

Splurge: Serums

“Serums are made with the smallest molecules, helping them to enter the skin on a deeper level and penetrate your cells to create change,” says Lindsey Blondin, lead esthetician at George The Salon in Chicago. “It takes a lot of science to create these tiny molecules, hence why serums (even the lower quality ones) are so pricey.” Cheaper serums are usually made with lots of filler ingredients and molecules that are too big to penetrate your skin on a cellular level. Look for serums that are “chirally correct,” which means they contain only the molecules with the skills to achieve the desired results. (And avoid these 6 anti-aging products you don’t actually need.) Try: PCA Skin C&E; Strength Max Anti-Aging Serum ($97, pcaskin.com, dermstore.com) Give yourself a DIY facial with this easy avocado mask recipe: ​ ​

Splurge: Retinol

When it comes to anti-aging topical treatments, retinol still reigns supreme. “With continued use, retinol helps strengthen the skin foundation and improve the appearance of fine lines and wrinkles,” says Joshua Zeichner, MD, director of cosmetic and clinical research in the Department of Dermatology at Mount Sinai Hospital in New York. Not all retinol-containing products are created equal, however. Some companies use only “sprinkle levels” of the active ingredient, so you won’t get enough retinol to achieve a meaningful result, says Sherber. “It is a highly unstable molecule, and must be properly formulated so that it remains active and penetrates sufficiently into the skin,” says Zeichner, who recommends seeking out products that have been proven effective in clinical studies. Try: Natura Bisse Diamond Extreme Mask ($110; neimanmarcus.com, lovelyskin.com) MORE: 4 Beauty Products You Should Never Skip After Age 40

Splurge: Sunscreen

Since you have to wear sunscreen every day, higher quality ingredients that are better for the skin (such as zinc oxide and titanium dioxide) are where it’s at, says Kim Kelder, lead esthetician and skincare expert at Miraval Resort & Spa in Arizona, especially if you have concerns about ingredient safety and chemical exposure with sunscreens. You’ll shell out a bit more dough, but peace of mind (and protected skin) is priceless. Try: Josh Rosebrook Nutrient Day Cream SPF 30 ($85; joshrosebrook.com), or one of these 6 best mineral sunscreens you can get online or at a drugstore  

Splurge: Exfoliator

You may save money buying a cheap exfoliator, but you won’t be doing your skin any favors. “Exfoliating is one of the most important steps for anti-aging to regenerate cell turnover,” says Blondin. Scrubs that are too harsh can actually cause microscopic cuts, scrapes, and tears to the skin that can lead to fine lines, wrinkles, scarring, and broken capillaries. To prevent skin damage, look for an exfoliant that contains light granules, such as jojoba beads. Try: Sir Activ+ Zeolite Invigorating Scrub ($48, sircuitskin.com) PREVENTION PREMIUM: Are These 3 Miracle Skin-Care Ingredients All They’re Cracked Up To Be?

Splurge: Foundation

Complexion products, such as foundation or concealer, are an area in which formulation often makes the most difference, says Sherber, because a flawless finish depends not only on matching the shade exactly, but having high quality ingredients that don’t irritate your skin. (If you need help picking a foundation for your skin type, use this expert guide.) Try: Make Up For Ever Ultra HD Invisible Cover Foundation ($43, sephora.com, makeupforever.com)

Splurge: Cleansing brush

Aren’t pricey sonic cleansing brushes and budget-friendly spinning varieties basically the same thing? Turns out, not really. “Sonic skin cleansing brushes harness a unique sweeping motion of the brush bristles that’s designed to dip just below the skin surface, into the pores and deep-set wrinkles,” says Erica Parker, aesthetician and director of education at Michael Todd Beauty. “This gentle side-to-side action stays within the skin’s safe range of elasticity—there’s no pulling or tugging of the skin with sonic technology.” Spinning brushes, on the other hand, don’t have the ability to dip into pores and wrinkles, and have the potential to snag and pull at the skin, which may cause loss of skin firmness. Translation: What you save on a cleansing brush now may be spent on repairing your skin later. Try: Soniclear Petite Sonic Skin Cleansing Brush ($89; ulta.com) MORE: 7 Things Your Skin Is Trying To Tell You

Save: Cleanser

If you’ve ever come across a face cleanser from a big-name beauty brand that costs as much as your car (kidding, sort of), it wouldn’t be out of the question to clap back with an Anderson Cooper eye roll. “None of the ingredients in a skin care cleanser would ever justify a sky-high price point,” says Parker. A cleanser is only on your face for 2 minutes, tops, so even if a company were putting pricey ingredients in their cleanser that take time to work (think: peptides), they won’t be on your face long enough to be effective. Unless you have acne prone skin that requires an active cleanser with bacteria-fighting ingredients, a simple, pH balanced formula should do the trick, says Blondin. (Also skip buying these 8 products that dermatologists never use on their own skin.)   Try: CeraVe Hydrating Cleanser ($10-15; target.com, ulta.com)

Save: Moisturizer

“You don’t have to spend a fortune to get a high quality moisturizer,” says Zeichner. “Many drugstore brands are easily spread, don’t leave the skin sticky, and provide high quality skin hydration.” Plus, if you’ve already splurged on a serum, your moisturizer just needs to act as a sealer, protecting the active ingredients underneath so they can do their thing sans interruption. (Just make sure to avoid these 9 common moisturizer mistakes.) Try: Vaseline Intensive Care Advanced Repair Unscented Lotion ($7; walmart.com) MORE: 9 Best Night Creams For Every Budget

Save: Eye shadow

Considering beauty products, like eye shadows and lipsticks, come in a bajillion different colors (and we want to try them all!), being thrifty about these purchases is just plain practical, says Kelder. If you have a few signature colors you turn to regularly, consider splurging on those—lux brands typically have a higher pigment concentration, which translates to bolder colors. Try: Neutrogena Nourishing Long Wear Eye Shadow + Built-in Primer ($10; neutrogena.com, ulta.com)

Save: Lip balm

Fortunately, your lips don’t need a bunch of complicated ingredients to stay soft—Kelder recommends sticking with balms that contain natural ingredients, since we inevitably absorb them when we lick our lips. Vitamin E, for example, is an excellent antioxidant that moisturizes and protects your lips against sun damage and pollutants. (Coconut oil and beeswax can also do wonders.) Try: Burt’s Bees Beeswax Lip Balm ($4; burtsbees.com, dermstore.com) MORE: Why Honey Is So Good For Your Skin—And 10 Amazing Honey Beauty Products To Try

Save: Makeup remover

There’s no reason to pay extra for a fancypants makeup remover when there are plenty of drugstore brands that gently remove makeup without stripping the skin’s natural moisture, says Elizabeth Tanzi, assistant clinical professor in the Department of Dermatology at the George Washington University Medical Center. Mic drop. Try: Neutrogena Naturals Fresh Cleansing + Makeup Remover ($7-8, neutrogena.com, target.com, ulta.com)