Why it worked
The video effectively demonstrates the product's efficacy through a clear before-and-after comparison over a short, consistent timeframe, leveraging the popular 'skincare transformation' trend.
Summary
The video shows a before and after comparison of a person's forehead with an acne spot. Over several days, the person applies Klairs EGF Serum to the spot, and by day 7, the acne and redness have significantly reduced.