children and young people under 18 years of age
pregnant women and women up to 2 months after delivery
people allergic to the sun and people with sunburn
people with heart problems, thyroid problems, kidney problems, vitiligo, hypertension, epilepsy, psoriasis, herpes, rosacea, and diabetes
people with fresh skin wounds or scars (e.g. after a recent surgery), people with many birthmarks or moles
people with a tendency to blood vessel dilation and capillary breakage
people taking photosensitizing medications or formulas, e.g. contraceptives, antidepressants, diuretics, heart medication, antibiotics, and preparations containing St. John’s wort extract
people who recently underwent depilation, closing of capillaries or exfoliation treatments
people who have recently used cosmetics with retinol, AHA acids