Wellness Wednesday: why humidity changes what your skin needs from oil
Customers write to us from Ubud and from Oslo, from Singapore and from Denver, and they all ask a version of the same question: why does the same face oil feel so different depending on where they are. The answer has little to do with the oil. It has to do with the air.
What your skin barrier is actually holding onto
The outermost layer of skin, the stratum corneum, is not a solid wall. It is a lipid matrix: ceramides, cholesterol, and fatty acids arranged like mortar between bricks of skin cells, holding water in place. Scientists call the natural loss of water through this layer transepidermal water loss, or TEWL. Some loss is constant and healthy. Too much, and skin turns dry, tight, and reactive.
The rate of that loss depends on a gradient: the difference in moisture between your skin and the air touching it. Humid air narrows the gradient, so water leaves slowly. Dry air widens it, so water leaves fast, sometimes faster than any routine can replace.
Why Bali is a forgiving climate, and most places are not
Bali sits near 80 percent humidity for most of the year. Skin here rarely fights to hold moisture, because the air is already holding plenty. An oil applied in this climate mostly has one job: seal a barrier that was not losing much to begin with.
A dry or air-conditioned climate asks the oil to do more. Without ambient moisture to work with, oil applied to bare, dry skin has little to trap. This is the most common reason a favourite product suddenly feels like it is not working: nothing changed in the bottle, but the air around the skin changed completely.
A rule that travels with you
Wherever you are, apply oil to skin that is still damp, whether from a shower, a mist, or a splash of water at the sink. Oil is an occlusive: its role is to seal in moisture that is already there, not to supply moisture of its own. In dry climates, add a water-based step first, such as a gel or hydrosol, so there is something for the oil to lock in. We cover the correct sequence in more depth in how to layer natural skincare.
The takeaway is simple: read your climate before you read your routine. The right amount of oil in Ubud is not the right amount in a heated apartment in December, and that is not a flaw in either the skin or the product. It is physics, and it responds well to a small adjustment.
Immortelle Helichrysum Face Serum
Formulated to support the skin’s own barrier repair, helichrysum-rich and lightweight enough for humid days, rich enough for dry ones. Apply to damp skin, morning or night, and let it seal in what the air will not.
