Health & Beauty

Research on L-ascorbic acid (the most studied form of vitamin C in skincare) shows meaningful effects at concentrations between 10% and 20%. Below 10%, the evidence thins out. Above 20%, irritation increases without proportional benefit. Check the concentration on the label — or if the brand doesn't list it, be skeptical.

There's limited but real evidence that regular scalp massage can increase hair thickness and promote growth by increasing blood circulation to follicles. The effect is modest and requires consistent use (daily, for several months). They're not a cure for pattern baldness, but for general scalp health and hair thickness, the evidence is more credible than most "hair growth" products on the market.

With the right tool and technique, yes. At-home dermaplaning devices use a smaller, less aggressive blade than professional ones. The main risks are irritation and small cuts from incorrect technique. Start on dry, clean skin, use light strokes, and avoid active breakouts or irritated skin. Don't do it more than once a week.

There's solid research showing red and near-infrared light at specific wavelengths (around 630–680nm for red, 810–850nm for near-infrared) can reduce inflammation, stimulate collagen production, and improve wound healing at a cellular level. Consumer masks vary widely in their actual light output. Devices that publish their irradiance specs (mW/cm²) are more credible. Many budget masks underpowered to make a clinical difference.

Physical (mineral) sunscreens use zinc oxide or titanium dioxide to reflect UV rays. Chemical sunscreens absorb UV and convert it to heat. Chemical sunscreens tend to be lighter and more cosmetically elegant. Mineral sunscreens are better for sensitive skin and have a longer safety record. Both work when applied correctly — the key variable is whether you use enough (a quarter teaspoon for the face) and reapply every two hours.