Most of us have a body care routine we don't think too hard about. A lotion we love, a body wash that smells amazing, products we've used for years. We trust that if something's on a shelf, it's been vetted. And for the most part, the ingredients do what they promise.

But there's a category of chemicals showing up in a lot of conventional body care — preservatives, fragrance ingredients, antimicrobials — that researchers have been paying closer attention to. They're called endocrine disruptors, and understanding what they are (and where they hide) is one of the more useful things you can know as someone who actually cares about what goes on their skin.

What are endocrine disruptors?

Quick refresher: your endocrine system is your body's hormonal network. It's a collection of glands — thyroid, adrenals, ovaries, testes, pituitary — that release hormones to regulate everything from your metabolism and mood to your reproductive health and immune response.

Hormones work in tiny, precise amounts. Think of them as highly specific signals — each one travels through your bloodstream, finds its target, and triggers an exact biological response. The system is incredibly calibrated, which is exactly why small interference can have real effects.

Endocrine disruptors are chemicals that get in the way of that system. Some mimic hormones and activate receptors they have no business activating. Others block receptors so your body's own hormones can't do their job. Others mess with how hormones are produced or broken down in the first place. They don't need to be present in large amounts to matter — because hormones themselves operate in tiny concentrations.

The impact of body care and exposure to such chemicals on the endocrine system

Most of the public conversation around endocrine disruptors focuses on food packaging, pesticides, and industrial chemicals. Body care gets less attention — but it probably deserves more.

Your skin isn't a sealed barrier. It's a permeable organ, and what you put on it gets absorbed. Studies have found measurable levels of common body care chemicals — parabens, phthalates — in blood and urine after normal topical use. Not trace amounts. Measurable ones.

The concern isn't any single product or any single application. It's the accumulation — the fact that most of us are applying multiple products to our skin, every day, starting from childhood, over decades. Each ingredient might fall below whatever individual threshold regulators consider "safe." But the cocktail effect — multiple endocrine disruptors used simultaneously over years — hasn't been studied nearly enough.

One study found that switching to products free of phthalates, parabens, and triclosan dropped measurable concentrations of those chemicals in participants' urine within three days. Three days. What you put on your skin gets in.

The endocrine disruptors to know about (and the risks to your hormones)

Parabens

Parabens — methylparaben, ethylparaben, propylparaben, butylparaben — are the most common preservatives in conventional body care. They're cheap, effective, and extend shelf life. They're also estrogen mimics: they bind to estrogen receptors in the body and activate them in ways they shouldn't.

Research has detected parabens in breast tissue and linked them to increased proliferation of breast cancer cells in lab settings. The direct causal link to human breast cancer hasn't been definitively established — science is rarely that tidy — but the mechanism of concern is real and well-documented enough that a lot of thoughtful formulators have moved away from them.

What to look for on labels: methylparaben, ethylparaben, propylparaben, butylparaben, isobutylparaben.

Phthalates

Phthalates are plasticizers — they make synthetic fragrances last longer and give plastics flexibility. In body care, they show up most often as diethyl phthalate (DEP) inside synthetic fragrance formulations. The catch: "fragrance" on an ingredient label is a legal catch-all that can contain hundreds of individual chemicals, including phthalates, without having to name them. So you could be applying a phthalate-based endocrine disruptor every day and never see it listed.

Phthalates are anti-androgenic — meaning they interfere with testosterone. Research has found that higher phthalate exposure correlates with significantly lower testosterone levels across multiple age groups, including children. That's not a fringe finding — it's published in major endocrinology journals.

What to look for: "fragrance" or "parfum" on any product, especially body wash and lotion.

Synthetic musks

Synthetic musks — galaxolide, tonalide, and others — are fragrance fixatives that make scents linger. They're in a huge number of body care products. The issue is that they accumulate in fatty tissue and have been detected in breast milk. Some have shown estrogenic activity in lab studies. They stick around, and what they do while they're there isn't fully understood.

Triclosan

Triclosan was in roughly 75% of antibacterial liquid soaps in the U.S. at its peak. It's a documented endocrine disruptor — specifically, it interferes with thyroid hormone function, blocking some of the pathways your thyroid uses to produce and regulate hormone levels. It also contributes to antibiotic resistance.

The FDA banned it from hand and body washes in 2016 — not because the science was perfectly settled, but because manufacturers couldn't prove it worked better than regular soap, and the risk profile wasn't worth it. It can still appear in toothpaste and some cosmetic categories.

PEG-based emulsifiers

PEGs (polyethylene glycols) and their derivatives — PEG-100 stearate, ceteareth-20, polysorbate 80 — create the smooth, light texture you feel in a lot of conventional lotions. They're not classified as endocrine disruptors themselves, but their manufacturing process can leave behind residues of ethylene oxide and 1,4-dioxane, both probable carcinogens. They also increase skin permeability — which means they can make it easier for other chemicals in the formula to absorb more deeply. Not ideal when those other chemicals include the ones above.

What to look for: anything starting with "PEG-", ceteareth, or polysorbate in a lotion or body wash.

Why are these chemicals in so many products?

Honestly? Formulation economics.

Products with water in them need preservatives — and parabens are cheap and effective. Synthetic fragrances are more consistent and affordable than natural ones, and phthalates help them last. PEG emulsifiers are easy to work with and produce a lighter feel than most plant-based alternatives. Synthetic musks stick around in a way natural musks don't.

The conventional body care formula is optimized for shelf life, scent performance, skin feel, and cost. Endocrine-disrupting chemicals are often the most efficient way to get all four.

It's also worth knowing that in the U.S., cosmetic ingredients don't require pre-market safety approval. They're considered safe until there's enough evidence to prove otherwise — which means ingredients with real mechanisms of concern stay in products while the research catches up. That's how triclosan was in the majority of antibacterial soaps for decades before it was finally pulled.

And "clean beauty" doesn't automatically fix it. Plenty of products with clean-sounding labels still contain synthetic fragrance, PEG derivatives, or other endocrine-disrupting ingredients. The label is marketing. The ingredient list is what's real.

What we do instead at Shelter Skin

We didn't build our formulas around what to avoid. We built them around what we actually wanted the product to do — and ended up with formulas that don't need any of the above.

At Shelter Skin, we’re passionate about providing skincare that harmonizes with your body instead of working against it. Our formulations are centered around 100% ingredient transparency and avoiding any known endocrine disruptors. By choosing truly natural ingredients like grass-fed, grass-finished tallow, jojoba oil, vanilla beans, and organic non-GMO vitamin E, we maintain purity without relying on synthetic additives or questionable fillers.

Tallow is inherently stable at room temperature and the formula is anhydrous (no water), so there's no environment for microbial growth. Jojoba oil has a molecular structure similar to your skin's own sebum, so it absorbs cleanly without needing a PEG-based emulsifier to lighten it. Vitamin E reinforces the formula's natural stability without synthetic additives.

For scent, everything is natural and named. No. 1 Vanilla uses whole vanilla bean. No. 1 Solar is scented with essential oils: bright citrus, soft florals, gentle base notes. No. 1 Deep End uses pure botanicals: coconut, ylang-ylang, tonka bean, sandalwood. No synthetic fragrance, hidden phthalates, or synthetic musks.

🤎 See also "How to use tallow body butter: a practical guide"

Tips for avoiding endocrine disruptors

• Read the label: Get comfortable with scanning ingredient lists. Look for brands committed to transparency so you can trust what you’re putting on your skin.

• Avoid “Fragrance” or “Parfum”: This generic term can hide dozens of unknown chemicals. Opt for products scented with real botanicals instead of synthetic fragrance blends.

• Choose trusted brands: Support companies that align with your values. When you buy from brands that prioritize non-toxic formulations, you’re encouraging industry-wide shifts toward cleaner beauty standards and less reliance on potential endocrine disruptors in products we're using every day.

Avoiding health effects from endocrine disruptors starts with body care

Endocrine disruptors aren't a wellness myth. The research on parabens, phthalates, synthetic musks, and triclosan is real. The mechanism — daily topical application, skin absorption, cumulative exposure over years — is well-established. And the regulatory framework in the U.S. doesn't require proof of safety before a chemical goes into a product you put on your body every day.

Repetitive exposure to chemicals can cause more than just health problems. Even in low doses, these substances can have an impact on your natural hormones.

Discover all-natural body care, lip products, and body tools from Shelter Skin.