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Substance tested in patch testing
Quaternium-15
A formaldehyde-releasing preservative found in shampoos and creams.
It is detected through patch testing; it can be avoided by reading labels.
This information is general and does not replace a consultation — diagnosis is always made in person. Mutual Clinic Braga 253 772 064 · Mutual Clinic Arcozelo 227 537 000 · B.clinic Funchal 291 142 030.