Sample
20 redditors with explicit opinion · 16 positive · 1 negative · 3 neutral
Score
0.835 — formula: 0.75 × % positive + 0.25 × pos/neg ratio
Confidence95% CI: 58–92% · the true approval rate falls in this range with 95% statistical confidence
Verdict
Holy Grail — ≥80% positive across ≥20 redditors. Top tier.
Sources
r/AsianBeauty, r/KoreanBeauty, r/tretinoin, r/AsianBeautyAdvice, r/SkincareAddiction + 3 more