💡 Over-cleansing destroys beneficial bacteria that protect skin from inflammation and infection
Your skin hosts approximately 1.5 trillion microorganisms — bacteria, fungi, viruses — that collectively form the skin . Far from being harmful, most of these organisms are : they live on you without causing damage, and many are actively protective. Staphylococcus epidermidis, for instance, produces peptides that suppress pathogenic bacteria. When you strip this ecosystem with harsh — the foaming agents in most cleansers — you create a : an imbalance that leaves your skin vulnerable to inflammation, eczema flare-ups, and opportunistic infection. The consensus is shifting toward -friendly formulations that cleanse without sterilizing.
Vocabulary (6)
British Journal of Dermatology5 words
Sunscreen Science: What SPF Actually Means
💡 SPF measures UVB protection only; true sun protection requires broad-spectrum coverage and reapplication
SPF 30 blocks 97% of rays. SPF 50 blocks 98%. The difference is marginal, yet consumers routinely pay premium prices for higher numbers, misunderstanding what the metric actually measures. SPF — sun protection factor — quantifies protection against radiation, the wavelength responsible for sunburn. It says nothing about UVA, the wavelength that penetrates deeper, degrades , and drives . address both, but only if applied in sufficient quantity: the standard testing protocol uses 2 milligrams per square centimeter, roughly a shot glass for the full body. Most people apply a quarter of that. The result is that your SPF 50 functions more like SPF 12 in practice. Chemical sunscreens absorb UV radiation; mineral sunscreens reflect it. Neither works if you apply too little or fail to reapply every two hours.