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Fragrances come from natural and synthetic raw materials. They’re composed of tens to hundreds of individual fragrance chemicals. Oftentimes, they contain skin allergens such as linalool and hexyl cinnamal. They’re made by dissolving extracts from roots, leaves, flowers and other parts of plants or synthesizing odorants that mimic the scents of plant oils.
When choosing a perfume or cologne, consider the strength. The higher the concentration of perfume oil, the stronger it will be. Eau de parfum (or perfume) contains the most intense mixture of perfume ingredients. It’s diluted with alcohol and kept undisturbed for up to a month to age, which helps to bond the alcohol and perfume oils together.
After the top note fades, middle notes will appear, containing heavier floral scents or more green and earthy fragrances. Finally, base notes will appear, which are more grounding and long-lasting scents such as tobacco or musk.