Not all clean beauty concerns are created equal. Some skincare ingredients to avoid have real scientific and regulatory backing for caution, while others have been swept up in marketing fear with very little evidence-based skincare research behind them. At awear, we think you deserve honesty about the difference between harmful skincare ingredients and precautionary choices. So here's a clear, science-backed skincare ingredient guide covering what the research actually says and how we approach our own non-toxic skincare formulation decisions.
Understanding Toxic Ingredients in Skincare: What the Science Says
Parabens: What the Science Actually Says
Parabens are synthetic preservatives that have been used in cosmetics for over 70 years. Most of the concern around them traces back to a 2004 study that detected parabens in breast tissue. But that study didn't establish a causal link, didn't compare results to healthy tissue, and has since been widely critiqued. The FDA, the EU's Scientific Committee on Consumer Safety, and the independent Cosmetic Ingredient Review panel have all reviewed the evidence and concluded that parabens at the concentrations used in cosmetics are safe. Their estrogenic activity is estimated to be millions of times weaker than the body's own estrogen. At awear, we choose not to use them. Not because the science condemns them, but because it's a deliberate formulation choice we've made. We want to be clear about that distinction. It's a brand value, not a scientific verdict. For those seeking paraben-free skincare, we offer that choice—but we want you to understand the nuance behind it.
Synthetic Fragrances: This One Has Real Backing
When you see the word 'fragrance' or 'parfum' on an ingredient label, it can legally represent a blend of hundreds of undisclosed chemical compounds. That loophole exists for trade secret protection, and it's a transparency issue worth knowing about. Unlike parabens, the concern here is strongly supported by clinical evidence. Fragrances are consistently identified as the number one cosmetic allergen in patch testing studies. The EU has formally named 26 fragrance ingredients with documented potential to trigger sensitization and allergic contact dermatitis, and now requires them to be individually labeled. For anyone with sensitive or reactive skin, undisclosed fragrances are a genuine risk factor.
Sulfates (SLS and SLES)
Sodium Lauryl Sulfate and Sodium Laureth Sulfate are surfactants that create lather in cleansers and shampoos. SLS is so effective at stripping the skin's lipid layer that dermatologists actually use it as a benchmark irritant in clinical patch testing. For people with healthy, resilient skin, occasional exposure is unlikely to cause lasting harm. But if you're dealing with a compromised skin barrier, eczema, rosacea, or persistent dryness, a sulfate-based cleanser could be quietly making things worse. Gentle cleanser such as Gentleclean™ - Vitamin Infused Calming Wash alternatives exist and work just as well, especially for those with sensitive skin, eczema, or rosacea.
Formaldehyde-Releasing Preservatives
Ingredients like DMDM hydantoin, imidazolidinyl urea, and quaternium-15 slowly release small amounts of formaldehyde into a formula over time. Formaldehyde is classified as a known human carcinogen by the International Agency for Research on Cancer. These preservatives turn up in shampoos, body washes, and some moisturizers. The doses involved are small, but daily cumulative exposure and the potential for skin sensitization are genuine concerns, and several countries have already moved to restrict their use in leave-on products.
Oxybenzone and Octinoxate: More Cause for Concern Here
Interestingly, these chemical UV filters carry stronger regulatory concern than parabens. The EU's Scientific Committee on Consumer Safety concluded in 2021 that oxybenzone is not safe at the concentrations currently used in sunscreens, and the EU has lowered its permitted limits accordingly. The FDA has also proposed that oxybenzone cannot be classified as generally recognized as safe and effective, citing insufficient data. Both oxybenzone and octinoxate are banned in Hawaii and other jurisdictions due to well-documented damage to coral reef ecosystems. The evidence on human endocrine disruption is still developing, but the regulatory direction is clear. If you're looking for reef-safe sunscreen or mineral sunscreen options, zinc oxide and titanium dioxide are your best bet for safe skincare ingredients with proven efficacy.
Phthalates
Phthalates are plasticizing chemicals often hidden within the 'fragrance' category on labels. They help fragrances last longer. Unlike parabens, phthalates have more substantial evidence of endocrine disruption and are restricted in cosmetics across the EU. Studies have shown they can cross the placental barrier, and regulatory bodies in multiple regions continue to tighten restrictions around them. This is a category where the concern is well-founded and worth taking seriously, particularly for those choosing pregnancy-safe skincare or building a clean skincare routine.
How We Think About This at awear
We exclude several of these ingredients in our formulations. But we always want to be honest about why. Some are precautionary choices, like parabens, where the science is more nuanced than the headlines suggest. Others reflect strong evidence of irritation risk, like sulfates and synthetic fragrances. Others align with a regulatory direction we agree with, like oxybenzone and phthalates. Clean beauty done right means being science-literate and transparent, not just fear-driven. That's the standard we hold ourselves to.
✦ Being an informed skincare consumer means understanding the evidence behind the labels, not just the marketing claims. Some concerns are genuinely well-founded. Others are more nuanced. Knowing the difference is where real empowerment starts.