Final answer:
The statement that fats and oils, which contain fatty acids, can replace the lack of natural lipids in the hair to prevent dullness is true. These plant-based oils, often rich in unsaturated fatty acids, help replenish hair's natural oils and provide a protective barrier for sheen and damage prevention.
Step-by-step explanation:
The statement that fatty acids in oils can replace the natural lipids in the hair to help avoid dullness is true. Your hair is composed of protein, typically keratin, and relies on lipids for luminosity and protection. Just like the skin, hair can become dry and dull when it lacks sufficient lipids, especially due to either external damage or dietary deficiencies. Adding oils rich in fatty acids can help replenish the hair's natural oils, which might be stripped away by harsh chemicals or excessive washing. These oils can provide a protective barrier, aiding in the hair's sheen and preventing damage.
For example, many plant-based oils such as olive oil, corn oil, and canola oil are good sources of unsaturated fatty acids. These unsaturated fats are liquid at room temperature due to their chemical structure, which includes one or more double bonds that induce a kink in their shape, preventing them from solidifying. They not only help improve blood cholesterol levels but can also serve as an external supplement to hair's natural oil, improving its appearance and texture.
It is important to note that while fatty acids can improve hair sheen and texture, they cannot repair hair that is already damaged (for example, split ends), which is a common misconception. Instead, they help in preventing future damage and can make hair appear more vibrant.