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Excessive oiliness is caused by what?

  1. Inadequate shampooing

  2. Overactive sebaceous glands

  3. Using harsh shampoo

  4. Not rinsing thoroughly

The correct answer is: Overactive sebaceous glands

Excessive oiliness is caused by overactive sebaceous glands. The sebaceous glands are responsible for producing oil to keep the skin and hair moisturized, but when they become more active than normal, it can lead to excessive oil production. Option A, inadequate shampooing, may contribute to the buildup of oil on the scalp, but it is not the root cause of excessive oiliness. Option C, using harsh shampoo, may temporarily strip the hair of oil, but it can also irritate the scalp and cause the sebaceous glands to produce even more oil. Option D, not rinsing thoroughly, can also contribute to product buildup on the scalp, but it is not the underlying cause of excessive oiliness.