![]() This substance acts as a humectant, drawing moisture from the air into your hair - which can really only be a good thing, right?Ĭlean ingredients and easy storage aside, shampoo bars’ biggest claim to fame is that they’re better for the environment. “Because of its ability to attract water in humid environments and leave the hair feeling soft, it is often added to shampoos of all types,” Dr. Robinson is a fan of sunflower oil for its ability to protect the scalp's skin barrier, castor oil for moisturizing drier hair types, and murumuru butter for a glossy a natural byproduct of soap production, is also commonly found in hair care bars like the ones from By Humankind and LUSH Cosmetics. “Oils and butters provide extra shine, moisture, and slip so that the hair feels more manageable after cleansing.” Both essentially mimic sebum - the scalp’s built-in moisturizing mechanism - to “coat the hair and protect it from additional damage over time.” Dr. “These are staple ingredients seen in shampoo bars,” the dermatologist says. With water and SLS out of the picture, many consciously-created shampoo bars turn to saponified oils and butters. Robinson confirms - although she says that’s not always the case, so it’s important to carefully read the label of any products you’re considering. “There are many shampoo bars that contain more mild, sulfate-free cleansers, and that are formulated with less additives,” Dr. SLS often washes away too much oil, leaving hair “squeaky" clean. “While it is very effective at removing excess oil and dirt from the scalp and hair, it can be too harsh for some people, particularly those with wavy, curly, or ethnic hair,” Dr. In short: Shampoo bars have fewer major ingredient that’s typically missing from shampoo bar formulations is sodium lauryl sulfate, or SLS. Both products boast just 10 ingredients - almost all of which are carrier oils, butters, and essential oils. “Our initial inspiration was to create a water-free option so that we could avoid preservative use,” Tara Pelletier, the co-founder of Meow Meow Tweet, tells TZR of her brand’s cult-favorite shampoo bars and just-launched conditioner bar. Not only does eliminating water allow for more concentrated products that “take up less space and are easier to travel with,” per the dermatologist, it also allows for fewer potentially harmful ingredients. Caroline Robinson, MD, a board-certified dermatologist who specializes in scalp care, tells The Zoe Report. “The main difference between shampoo bars and liquid shampoos is the lack of water in bars,” Dr. The result? Smooth, shiny hair that looks and feels healthy - and is healthy for the planet, too. But that’s a non-issue with the latest crop of innovative solid shampoos, many of which feature gorgeous natural oils (like sunflower and castor) and hydrating butters (like shea and mango) alongside moisture-binding glycerin. Swapping out your trusty bottle of liquid shampoo for a solid bar may feel counterintuitive at first, if only because “bar soaps” have a reputation of being harsh on skin and hair. ![]() Luckily, brands are taking note of beauty’s big little plastic problem, and now offer plenty of eco-friendly alternative: Luxe glass jars, refillable lipsticks, and - my personal favorite - shampoo bars that require almost zero packaging. Go ahead, check your top shelf: The majority of your bottles, jars, pumps, and applicators are probably fashioned out of the same material that accounts for 300 million tons of waste per year. The ingredient taking over beauty routines everywhere isn’t retinol, or vitamin C, or even hyaluronic acid.
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