5. No7 Protect & Perfect Intense Advanced Serum
GH Seal star No7 was the best bargain in the GH Beauty Lab’s face serum test, delivering results on par with or better than pricier options. The peptide, hyaluronic acid and retinol formula earned the best marks for smoothing skin’s texture, plus received strong scores for improving firmness and diminishing pores. Described as “lightweight” by many testers, the serum made skin “look younger” and wrinkles “less visible,” though some reported slight irritation.