Ingredient · dataset v56
Watermelon Seed Oil and fungal acne
May trigger · Moderate evidence
Why it's a potential trigger
Rich in linoleic and related C18 unsaturated fats — the core menu Malassezia yeast harvests once its lipases split the oil's triglycerides.
Explicit row under the fatty-oil rule (same basis as the ruled seed oils); not individually feeding-tested.
Evidence strength
Moderate evidence (2/3)
Function
Oil
Plant oils: triglyceride oils and butters the yeast harvests after its enzymes split them.
Also listed as
Citrullus Lanatus Seed Oil, Citrullus Vulgaris Seed Oil, Kalahari Melon Seed Oil
Products without this ingredient
- Avene Micellar Cleansing Water 3-in-1 200 ml
- Skin1004 Madagascar Centella Asiatica 100 Ampoule
- Native Moisturizing Shampoo Coconut & Vanilla 16.5 oz
- Roe Wellness SPF 50 Mineral Powder
- Skin1004 Centella Toning Toner 210 ml
- Cococare Africare 100% Mineral Oil 8.5 fl oz
Related oil
- Acai Fruit Oil — May trigger · Moderate evidence
- Apricot Kernel Oil — May trigger · Moderate evidence
- Argan Oil — May trigger · Moderate evidence
- Avocado Oil — May trigger · Moderate evidence
- Babassu Seed Oil — May trigger · Moderate evidence
- Baobab Seed Oil — May trigger · Moderate evidence
- Black Currant Seed Oil — May trigger · Moderate evidence
- Borago Officinalis Seed Oil — May trigger · Moderate evidence
Sources
- Brunke & Hube 2006 — MfLIP1 extracellular lipase hydrolyses Tweens (Microbiology)
- Mayser et al. 1995 — ester hydrolysis depends on alcohol moiety (Acta Derm Venereol)
- EU CosIng database — search the INCI name
Last reviewed: 2026-10-13 (dataset v56).
Questions
Does Watermelon Seed Oil trigger fungal acne?
We flag it as a potential trigger (moderate evidence). That means it belongs to a class the Malassezia yeast is known to feed on — not that every product with it will cause a flare. Concentration, formulation and individual skin chemistry matter.
Does Watermelon Seed Oil feed Malassezia?
Yes: we flag Watermelon Seed Oil as a potential trigger (moderate evidence). It belongs to a class Malassezia is known to feed on — not a claim that every product with it causes a flare. Concentration, formulation and individual skin chemistry matter.
How confident is this call?
Moderate evidence: Rich in linoleic and related C18 unsaturated fats — the core menu this yeast harvests once its lipases split the oil's triglycerides.
Is this medical advice?
No. We screen ingredient lists; we never diagnose, treat, or certify products. When in doubt, ask a dermatologist.
Check a full list containing Watermelon Seed Oil →
Not medical advice: we screen ingredient lists for potential triggers — we never diagnose, treat, or certify products. Dataset v56.