Skincare Myths That Even Careful Shoppers Believe

Poison ivy is entirely natural. So is urushiol, the compound that causes its notorious rash. Meanwhile, many synthetic ingredients used in skincare, such as lab-created hyaluronic acid, are chemically identical to what occurs in the body and have extensive safety data behind them. What matters is the specific ingredient, its concentration, your individual skin, and how a formula is tested — not whether it came from a plant or a laboratory.

Fragrance, luxury packaging, and celebrity endorsement all drive up retail price without affecting how a product performs on skin. Many affordable formulations contain the same active ingredients — retinol, niacinamide, ceramides — at equivalent concentrations to prestige counterparts. When evaluating a product, look at the ingredient list and any published efficacy data, not the price point.

SPF ratings are established in lab conditions using a specific quantity of product — approximately 2 mg per square centimeter of skin. Studies consistently show that people apply foundation at a fraction of that amount. The result is meaningful SPF underperformance. A dedicated broad-spectrum sunscreen applied before makeup remains the standard dermatological recommendation for UV protection. For a deeper look at why this step matters so much, see why sunscreen is the most evidence-backed skincare step.

Sebum is produced by sebaceous glands; skin hydration depends on water content in the upper skin layers. When skin is dehydrated — as it can be even in people with oily skin — the skin may compensate by increasing oil production. A lightweight, non-comedogenic (meaning it won't block pores) moisturizer helps maintain the skin barrier without adding heaviness, and is appropriate for most skin types, including oily and acne-prone.

Some active ingredients compete for the same skin receptors, work at different pH levels, or simply increase the cumulative irritation load on skin when combined. Retinoids and exfoliating acids used simultaneously, for example, are well known to cause dryness and sensitivity. A targeted routine using a small number of well-chosen, evidence-backed ingredients — introduced gradually — is more likely to produce results than an overloaded regimen. For a detailed overview of one of the most studied actives, see retinoids explained.

UVA wavelengths remain relatively constant throughout the day and across seasons, unlike UVB, which varies more with sun angle. This means incidental exposure through windows while driving or sitting near glass, and on overcast days, still contributes to cumulative UV damage over time. Dermatological guidance supports daily broad-spectrum SPF as a baseline habit regardless of weather or whether you plan to spend time outside.