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This week begins on the first day of menstruation. From day 1 to day 7, your body’s two main hormones, estrogen and progesterone, are at their lowest.
The drop in estrogen levels decreases the presence of water in the epidermis, leaving the skin dehydrated. In addition, it’s during this time that your skin is its most sensitive.
Additionally, these two conditions are present during menopause, the moment of a woman's life where estrogen levels are also at their lowest.
What’s more, the low concentration of progesterone prevents the overproduction of sebum. This is why the skin tends to be less oily than at other times throughout the cycle.
During this week, the skin is sensitive and dehydrated.
Discover the hydrating and soothing serum for week 1.
Each serum is adapted to the week that corresponds with your cycle
Week 1: hydrating and soothing serum
Week 2: radiance and suppleness serum
Week 3: hydrating and astringent serum
Week 4: mattifying and anti-blemish serum
Falcone, D., Richters, R., Uzunbajakava, N., Van Erp, P., Van de Kerkhof, P., (2017). Sensitive skin and the influence of female hormone fluctuations: results from a cross-sectional digital survey in the Dutch population. European Journal of Dermatology