You can use a skincare product for years without a problem—and then suddenly become allergic to it. Allergic contact dermatitis develops through sensitization, a process in which T cells learn to recognize a specific allergen and form lasting immunologic memory. Some of those memory cells can remain in the skin long after a rash has resolved, ready to respond when the allergen appears again. We explain why previous tolerance doesn’t rule out allergy, why reactions can recur so quickly, and why skin may take surprisingly long to recover even after the offending product is gone.
Healthy skin isn't built by adding more products—it's built by supporting one of the body's most sophisticated structures: the skin barrier. In this week's blog, we explore the science behind the stratum corneum, why ceramides alone aren't enough, and the critical roles of cholesterol, free fatty acids, and transepidermal water loss (TEWL). Understanding what your skin barrier actually needs may change the way you think about your entire skincare routine.
If an eye cream is simply a facial moisturizer with the fragrance, essential oils, or other potentially irritating ingredients removed, it raises an important question: why weren't those ingredients left out of the facial moisturizer to begin with?
Rather than creating two separate products—one for the face and one for the eyes—it makes more scientific sense to formulate a single moisturizer that is gentle, barrier-supportive, and suitable for the entire face, including the delicate eye area.
The goal shouldn't be to buy a second moisturizer for one small area of your face. It should be to choose a well-formulated moisturizer from the start—one that hydrates effectively, supports the skin barrier, and avoids unnecessary ingredients that can increase the risk of irritation.
After all, your skin doesn't care what the product is called. It cares about the formulation.
Most people know to avoid harsh sulfates, but few realize that many "gentle" cleansers rely on surfactants that are increasingly recognized causes of allergic contact dermatitis. Learn the science behind surfactants and why we formulated our cleanser without cocamidopropyl betaine (CAPB) or glucosides.
Many people stop using their retinoids during the summer out of fear they'll become "sun sensitive." But is that actually supported by the science? We break down the difference between photosensitivity, barrier function, and why most people can safely continue their retinoid all summer long.
