Hormone Hair care

HORMONE CARE

Your formula should work with your hormones,
not against them.

Under Your Skin is built around one belief: what you put on your body ends up under your skin. That's why every formula is hormone-conscious by design - independently reviewed, endocrine disruptor-free, and powered by plant stem cell technology. No compromises. Just visible results you can feel confident about.

Shop Hormone Care → Explore All Products
WHY IT MATTERS

Your hormones are running the show. Your skincare should know that.

Hormones govern everything from hair density and skin clarity to energy, mood, and metabolism. When the products you use daily introduce endocrine disruptors into the equation, the balance you're working so hard to maintain comes under quiet, cumulative pressure. Under Your Skin was built to remove that pressure entirely — fewer, better ingredients chosen with your whole endocrine system in mind.

 

 

OESTROGEN

Protecting oestrogen balance from the outside in

Oestrogen-mimicking compounds — particularly parabens and certain synthetic musks — are among the most widely studied endocrine disruptors in personal care. They bind to oestrogen receptors and can contribute to hormonal imbalance over time. Every Under Your Skin formula is built free from these compounds, supporting the oestrogen balance your body works hard to maintain.

THYROID

Low-tox formulas for a sensitive endocrine system

The thyroid is one of the most endocrine-sensitive organs in the body, and those managing hypothyroidism, Hashimoto's, or subclinical thyroid dysfunction are often advised to reduce their overall toxic load. Triclosan and certain UV filters have been identified as thyroid-disrupting compounds in research settings. Under Your Skin formulates without these ingredients as a baseline — not an afterthought.

CORTISOL

Fewer stressors for a stress-burdened system

Chronic stress elevates cortisol, and elevated cortisol contributes to hair thinning, scalp sensitivity, and disrupted skin barrier function. Adding topical chemical stressors on top of physiological ones compounds the burden. Under Your Skin's independently reviewed formulas are designed to minimise that external load — so your scalp and skin can focus on recovery, not defence.

PROGESTERONE

Hormone-conscious care across every life stage

Progesterone fluctuates significantly during the menstrual cycle, pregnancy, postpartum recovery, and perimenopause — and these fluctuations directly affect scalp oil production, skin hydration, and hair density. Under Your Skin was formulated with these transitions in mind, using endocrine disruptor-free ingredients that support the skin barrier without adding hormonal interference during your most sensitive phases.

MELATONIN

Honouring the hormones that work while you sleep

Melatonin plays a documented role in hair follicle cycling and skin cell repair — much of which occurs overnight. Certain synthetic fragrances and preservatives have been shown to interfere with melatonin pathways, subtly undermining the regenerative work happening while you rest. Under Your Skin's no-compromise formulas are free from synthetic fragrance entirely, so your overnight renewal can proceed uninterrupted.

INSULIN

Supporting skin health in insulin-sensitive conditions

Insulin resistance — common in PCOS and metabolic syndrome — is closely linked to scalp inflammation, excess sebum, and androgenic hair loss. For those navigating these conditions, reducing the overall endocrine burden from personal care products is a meaningful, actionable step. Under Your Skin is frequently chosen by women managing PCOS because its formula is built around their hormonal reality, not in spite of it.

The bigger picture

Endocrine disruption is a public health issue

60%

Absorbed through skin

Research indicates that up to 60% of what is applied topically can be absorbed through the skin and into systemic circulation — making ingredient transparency not a luxury, but a necessity.

515+

Endocrine disruptors in cosmetics

A 2022 analysis identified over 515 substances with endocrine-disrupting potential currently in use across personal care products — the majority appearing in everyday haircare and skincare formulas.

100+

Compounds in 'fragrance'

A single 'parfum' or 'fragrance' declaration on an INCI list can legally represent more than 100 individual chemical compounds — many of which are never individually disclosed and include documented endocrine disruptors.

The Density Collection

Hormone-conscious haircare for hair loss — plant stem cell technology, endocrine disruptor-free from the very first drop.


Bestseller

Hair Growth Kit

Thicker hair in 90 days — 300 ml

$110

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Most loved

Hair Growth Serum 3-pack

For thicker, fuller hair

$144

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Hair Growth Shampoo

For thicker, stronger hair — 300 ml

$42

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Hair Growth Conditioner

For dry hair and hair loss — 300 ml

$42

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Our approach

Built in from the start. Not added on at the end.

Hormone-conscious formulation isn't a marketing layer — it's an architectural decision made at the start of every product development process. Here's what you will never find in an Under Your Skin formula, and why it matters.

Free from

Synthetic fragrances

A single 'parfum' or 'fragrance' listing can conceal over 100 individual compounds — including phthalates and synthetic musks with documented endocrine-disrupting activity. Under Your Skin formulates without synthetic fragrance entirely, eliminating this category of hidden hormonal exposure from the first ingredient decision.

Free from

Parabens

Methylparaben, propylparaben, and their derivatives are preservatives with well-documented oestrogen-mimicking activity. They are among the most studied endocrine disruptors in personal care — and among the most straightforward to eliminate. Under Your Skin uses alternative preservation systems reviewed independently for both safety and efficacy.

Free from

Phthalates

Phthalates such as DEP and DBP are plasticising compounds used as fixatives in synthetic fragrance formulations — and rarely appear on INCI lists by name because they are embedded under 'fragrance' or 'parfum'. Linked to androgen disruption and widely restricted in children's products, they have no place in a formula designed for hormone-sensitive life stages.

Free from

Chemical UV filters

Certain synthetic UV filters — including oxybenzone (benzophenone-3) and octinoxate — have been identified as endocrine disruptors with documented hormone-disrupting activity in peer-reviewed research. They are absorbed through the skin in measurable quantities. Under Your Skin avoids these compounds entirely across its full range, independently verified by our toxicology partners.

Free from

PFAS

Per- and polyfluoroalkyl substances are persistent synthetic chemicals increasingly found in cosmetics. Linked to hormonal disruption and immune interference — classified as 'forever chemicals', they have no place in a hormone-conscious formula.

Free from

SLES & sulphates

Sodium laureth sulphate and related sulphates strip the scalp's natural barrier and are often contaminated with 1,4-dioxane during manufacturing. We use gentle, sulphate-free cleansers instead.

Read our Hormone Safety Benchmark →

Clean beauty, verified by science

100% Independently toxicologist-reviewed
0 Endocrine disruptors across all formulas
Full INCI transparency on every product page
Dermatologist Reviewed for scalp and skin safety

Hormone-friendly kits & bundles

The products our community keeps coming back to — endocrine disruptor-free, independently reviewed, built to perform.


Hair Care

Hair Growth Kit

$110

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Hair Care

Detox Kit

$75

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Hair Care

Hair Growth Serum

$54

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Hair Care

Dry Shampoo

$38

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This April

Live sessions & events

Join us throughout the month for honest conversations about hormonal health — with product recommendations woven in naturally.

MAR 12

Bathroom swap

Our founder Lovisa will share easy low-tox swaps you can do in your bathroom cabinet.

LIVE
MAR 31

Your skin through the cycle

To kick-off Hormone month, our Founder Lovisa will give you a grounding introduction to the endocrine system, with Q&A

LIVE
APR 20

Hormones with Sheila Arnell

We are hosting a live together with hormone coach and expert Sheila Arnell.

SOON
TBD

Hormones with founders of Hormona

We will host a live together with the founders of Hormona, we will talk about how to instant track your hormones and the impact of your body and hair.

SOON

Frequently asked questions

Your questions, answered clearly.

Q: What are hormone-safe hair products?

A: Hormone-safe hair products are formulated without endocrine disruptors — compounds that can mimic, block, or alter the body's hormonal signals. In haircare, the most significant categories to avoid are parabens (oestrogen mimics), phthalates (concealed in synthetic fragrance), and certain UV filters. They are most commonly sought during pregnancy, postpartum, menopause, and by anyone managing PCOS, endometriosis, or thyroid disorder. Under Your Skin was formulated with this in mind — excluding parabens, phthalates and synthetic fragrance across its full range, with complete INCI lists on every product page.

Q: What ingredients disrupt hormones in shampoo?

A: The endocrine-disrupting ingredients most confidently identified in shampoo are: methylparaben and propylparaben (preservatives with documented oestrogen-mimicking activity), phthalates such as DEP and DBP (plasticisers embedded in synthetic fragrance formulations), and certain synthetic musks and UV filters. Crucially, phthalates are rarely disclosed on INCI lists because they're embedded in 'fragrance' or 'parfum' — a single declaration that can contain dozens of compounds. Under Your Skin formulates without synthetic fragrance entirely, eliminating this vector of hidden endocrine disruptors.

Q: Is fragrance an endocrine disruptor?

A: Synthetic fragrance is one of the most significant vectors for hidden endocrine-disrupting compounds in personal care products. A single 'parfum' or 'fragrance' listing on an INCI list can legally represent over 100 individual chemical compounds — many of which are never disclosed. Among these, phthalates (used as fixatives) and certain synthetic musks have documented endocrine-disrupting activity. Under Your Skin formulates without synthetic fragrances entirely, eliminating this category of endocrine exposure in one product switch.

Q: What shampoo is safe for hormonal hair loss?

A: A shampoo safe for hormonal hair loss avoids adding topical endocrine disruptors to a system already under hormonal stress. The key exclusions are parabens (oestrogen-mimicking preservatives), phthalates (plasticisers concealed in synthetic fragrance), and synthetic fragrance itself. These compounds are absorbed through the scalp and can contribute to hormonal interference. Under Your Skin is a commonly chosen option for hormonal hair loss — whether postpartum, PCOS-related, or menopausal — because its formula is specifically built around these ingredients.

Q: What shampoo is safe for PCOS hair loss?

A: For PCOS-related hair loss, a hormone-safe shampoo reduces topical endocrine exposure alongside medical management. PCOS already involves hormonal imbalance — removing additional sources of hormonal interference (parabens, phthalates, synthetic fragrance) is a sensible parallel step. Under Your Skin is frequently chosen by people with PCOS for exactly this reason: sulphate-free, paraben-free, fragrance-free, with a fully disclosed ingredient list.

Q: Can shampoo affect hormones?

A: Shampoo is applied topically but skin absorption means some ingredients enter systemic circulation. Studies have detected parabens and phthalates in blood and urine following topical application of personal care products. The scalp in particular has high vascularity and relatively thin skin, making it an efficient absorption site. Under Your Skin excludes all of these categories specifically to minimise systemic exposure through daily use.

Q: What is the best hormone-safe shampoo?

A: The best hormone-safe shampoo combines three qualities: full exclusion of endocrine-disrupting ingredients (parabens, phthalates, synthetic fragrance); a transparent, fully disclosed INCI list you can verify independently; and efficacy you don't have to sacrifice to use it. Under Your Skin meets all three criteria — and is frequently cited in hormone-conscious beauty communities and used by people managing PCOS, endometriosis, and thyroid disorder.

Q: Are natural shampoos always hormone-safe?

A: Natural shampoos are not automatically hormone-safe — 'natural' has no regulated definition in the EU or UK beauty market, and products labelled natural can legally contain parabens, synthetic fragrance, and other endocrine-disrupting ingredients. The only reliable indicator is the INCI list, not front-of-pack claims. Under Your Skin publishes its full ingredient list, avoids parabens, phthalates, and synthetic fragrance, and doesn't rely on 'natural' as a marketing shortcut.

A note from us

Under Your Skin products are designed to support a low-tox lifestyle — not to treat, diagnose, or replace medical care. If you are managing a hormone-related condition such as PCOS, endometriosis, thyroid disorder, or experiencing significant hair loss, we always recommend consulting your doctor or a qualified healthcare professional. Our products work best as part of a wider approach to your health, not instead of one.

No compromise. No hidden ingredients. No guesswork.

You've made the decision to be hormone-conscious - Under Your Skin makes sure your haircare is too. Independently reviewed, endocrine disruptor-free, and powered by plant stem cell technology for visible results you can trust at every stage.