Acne / Pore Health
Comedogenicity Calculator
Weighted Fulton-scale score for a facial oil or moisturiser blend. On melanin-rich skin, clogged pores resolve as dark spots — keep the weighted score low and avoid rating-4+ ingredients in leave-on facial formulas.
Blend
R 2
R 0
R 1
R 0
Totals don't need to equal 100% — score is weighted by relative share.
Result
Weighted comedo score
1.00
Highest ingredient rating
2
Avg irritation index
0.00
Within safe range for acne skin.
Rules of thumb
- Facial leave-on, acne-prone: keep weighted score < 1.5, no individual ingredient ≥ 4.
- High-linoleic oils restore barrier in acne-prone skin (hemp, safflower-HL, sunflower-HL, grapeseed).
- High-oleic oils (olive, marula, oleic safflower) can worsen acne via lipase activity from C. acnes.
- Coconut oil & cocoa butter: body and hair only on acne-prone — never on facial leave-on.
- Patch test: 2 weeks behind the ear, then jawline, before full face.
- The Fulton scale is rabbit-ear based — treat as a guide, not gospel; individual response varies.