The Ordinary Niacinamide 10% + Zinc 1% wins overall for most shoppers: it has higher scores across effectiveness, beauty results, ingredient quality, ease of use, and claim support, plus standout customer satisfaction and brand trust. Its main downside is that some users experience dryness, burning, or irritation—often tied to overuse—so starting slowly matters.
ELBBUB Vitamin C Serum remains a compelling budget alternative if you specifically want a vitamin C-style serum and like a lightweight, fast-absorbing feel. Its biggest limitations are the runny consistency and more mixed results. If you want the most reliable “set it and forget it” performance, The Ordinary is the safer choice.