Barbara O'Neill teaches extensively on hormones and skin aging, presenting a framework that connects the hormonal shifts of aging — declining estrogen, progesterone, testosterone, growth hormone, and DHEA — to the skin changes that most people attribute simply to getting older. Her position is that many changes conventionally attributed to aging are more accurately attributed to hormonal decline that can be slowed or partially reversed through natural means.
How Hormonal Changes Affect Skin
Estrogen and collagen. Estrogen stimulates collagen synthesis and maintains collagen density in skin. In the years following menopause, when estrogen levels decline sharply, women lose approximately 30% of skin collagen in the first five years. The thinning, loss of elasticity, and increased wrinkling that occurs post-menopause is substantially estrogen-related rather than purely age-related.
Progesterone and skin barrier. Progesterone supports sebaceous gland function and skin barrier maintenance. Declining progesterone contributes to dryness and increased skin sensitivity in perimenopausal women. O'Neill connects progesterone decline to some of the skin sensitivity and reactivity that women experience in midlife.
Testosterone and oiliness. The relative increase in androgenic hormones compared to declining estrogen and progesterone in perimenopause can produce adult acne in women who never experienced it in youth. The same relative androgen excess drives the sebaceous gland overactivity that causes acne.
Growth hormone and cellular renewal. Growth hormone declines progressively from the mid-twenties onward. Since growth hormone is the primary driver of cellular renewal and skin repair, its decline directly contributes to slower wound healing, slower skin cell turnover, and accumulating cellular damage that accelerates visible aging.
DHEA and skin thickness. DHEA (dehydroepiandrosterone) is a precursor hormone that declines with age. It supports skin thickness and moisture content. Declining DHEA contributes to the skin thinning that makes older skin more fragile and slower to heal.
O'Neill's Natural Hormone Support Approach
O'Neill advocates for supporting hormonal health through natural means rather than synthetic hormone replacement, which she has discussed critically in terms of its risks. Her recommendations:
Diet for hormonal balance. Plant-based phytoestrogens from flaxseed, legumes, and fermented soy provide mild estrogenic activity that can partially compensate for declining estrogen without the risks of synthetic estrogen. She also emphasizes cruciferous vegetables for their role in estrogen metabolism and detoxification.
Reducing xenoestrogens. Synthetic chemical compounds with estrogenic activity — found in plastics, conventional personal care products, and pesticide residues — disrupt hormonal balance by occupying estrogen receptors. O'Neill strongly recommends eliminating these sources, including synthetic fragrance in personal care products which contains phthalates and other xenoestrogen compounds.
Sleep for growth hormone. Growth hormone is released during deep sleep. Prioritizing sleep quality is the most direct natural intervention for growth hormone support available.
Herbal support. She references herbs traditionally used for hormonal balance in women: wild yam as a natural progesterone precursor, black cohosh for menopausal symptom management, and maca root as an adaptogen that supports overall endocrine function.
Natural Soap and Hormone-Healthy Skin Care
For people following O'Neill's hormone health framework, eliminating xenoestrogen sources from personal care products is a foundational step. Synthetic fragrance is the most significant xenoestrogen source in conventional soap and body wash — phthalates used as fragrance fixatives are potent endocrine disruptors with documented effects on estrogen receptor activity.
Every bar in our lineup uses essential oils rather than synthetic fragrance, eliminating this xenoestrogen source from daily skin contact. Our Bourbon and Tobacco Luxury Bar with its high shea butter content addresses the moisturization needs of hormonally aging skin that O'Neill describes, providing extended barrier support through the unsaponifiable fraction of shea that remains on skin after washing.
Natural soap is not hormone therapy. But removing xenoestrogen sources from daily personal care, as O'Neill recommends, removes a chronic hormonal disruptor that works against the natural balance her other recommendations aim to support.
Beyond Clean, Beyond Ordinary.