MERDERMA SCAR CREAM Contains, Onion extract, Purified water, PEG-4, xanthan gum, methylparaben, sorbic acid, aloe. (can cause reproductive problems). Aloe is liver toxic. Contains methylparabens which can cause biochemical or cellular level changes. Mederma contains an endocrine disruptor, harmful to PLD. Endocrine disruptors also contribute to allergies and they have many immunotoxic effects. Fragrances can give one a weight gain. Fragrances are also ecotoxic and can contribute to allergies, irritation of the skin, eyes, or lungs and they can be liver toxic.