Eczema, hay fever, asthma: for many parents, these conditions sound like separate problems. But science shows that they often have a common starting point: a baby's skin in the first few months of life. This article explains the atopic march: what it is, what science says, and why the skin barrier plays such a central role.
What is the atopic march?
The atopic march describes a pattern that researchers have observed in children with an increased risk of allergic conditions. It often begins with skin issues in early infancy. Irritated, sensitive skin or eczema can later develop into food allergies, hay fever, or asthma. The term "march" refers to the progression: one condition follows another, like dominoes.
It is important to emphasize that the atopic march is not a certainty. Not every child with sensitive skin will develop later allergic conditions. However, the scientific connection between a disrupted skin barrier in early infancy and an increased chance of atopic conditions later on is well-documented and widely recognized in pediatrics and dermatology.
The role of the skin barrier
The key to understanding the atopic march lies in the skin barrier. In babies, this barrier is still developing; the lipid structure that holds skin cells together like "bricks in cement" is not yet fully formed. This makes the skin more permeable than an adult's.
A leaky barrier not only allows moisture to escape; it also allows allergens, fine dust, and harmful substances to enter. As soon as these invaders reach the lower skin layers, the immune system reacts. In babies, whose immune system is still actively learning and developing, this reaction can extend beyond the skin alone.
The Dual Allergen Exposure Hypothesis
Prof. Gideon Lack of King's College London demonstrated that allergens reach the immune system in two ways: through the mouth (tolerance) or through a leaky skin (sensitization). An intact skin barrier in early infancy can prevent the immune system from being "misprogrammed" for allergic reactions.
The microbiome as director
The connection between the skin barrier and the immune system largely occurs via the skin microbiome. A balanced microbiome stimulates the production of anti-inflammatory substances and teaches the immune system to distinguish between a harmless stimulus and a real threat. A disrupted microbiome can interfere with this learning process.
Research shows that reduced bacterial diversity on the skin in early infancy is associated with an increased risk of atopic conditions. This is not a cause-and-effect relationship that scientists consider proven, but the correlation is strong enough to consider the microbiome an important factor in early skin development.
What can parents do?
Science gives parents a concrete course of action: supporting the skin barrier and microbiome during the first 1000 days. This does not mean intervening or treating, but rather creating the right conditions for the skin to develop as healthily as possible.
Products that strengthen the barrier with skin-identical ingredients like squalane, respect the microbiome, and contain no unnecessary substances that disrupt bacterial balance, best align with what the skin needs at this stage.
For us, this was more than enough reason to critically review every step in the formulation. What ingredient adds value? What can a newborn's skin truly use and what not? These questions led us to a barrier-first approach, a short, effective INCI list, and the choice to have all our products independently tested by Kind to Biome™. For baby skin, less than proof is not enough, and mild and gentle must always be demonstrable for us. Happy baby skin, happy you.
Sources
- Lack, G. (2008). Epidemiologic risks for food allergy. Journal of Allergy and Clinical Immunology.
- Spergel, J.M. & Paller, A.S. (2003). Atopic dermatitis and the atopic march. Journal of Allergy and Clinical Immunology.
- Elias, P.M. & Schmuth, M. (2009). Abnormal skin barrier in the etiopathogenesis of atopic dermatitis. Current Opinion in Allergy and Clinical Immunology.
- Bieber, T. (2022). Atopic dermatitis: an expanding therapeutic pipeline for a complex disease. Nature Reviews Drug Discovery.
This article is informative in nature and describes scientific connections, not medical diagnoses or treatment advice. If you have concerns about your baby's skin, we recommend consulting a dermatologist or pediatrician.
