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Preservatives are essential for the safe use of cosmetics, helping to ensure that products remain viable. They prevent microbial contamination and spoilage whilst helping to maintain a product's freshness. This is especially important in humid climates or when a product contains water. Antioxidants suitable for use in cosmetics are also available, including Vitamin E and rosemary extracts. These fight the effects of free radicals caused by overexposure to sun and other environmental factors which can damage both skin cells and hair follicles. When used in combination with preservatives, antioxidants help keep cosmetics at their freshest and free from impurities, giving consumers peace of mind as they use them daily.