Choosing the right conditioner or shampoo for your hair can be a matter of trial and error. Some products may make your hair limp, while others may even dull it with a film. Choose two different brands of shampoo and conditioner that are right for you, alternate use will give the best result. It is a myth that shampooing increases hair loss. Whether dry or greasy, hair should be washed as often as required to look good, even every day.
Most experts recommend at least once a week washing to prevent dandruff from clogging the scalp.
If you have an oily scalp, frequent shampooing will keep the hair from lying flat, weighted down by the fats in sebum. Shampoo will also reduce surface sebum, which contains high levels of testosterone and DHT that may re-enter the skin and affect the hair follicle. Very dry hair may be improved by massaging with a little olive or almond oil, covering and leaving on overnight, washing out next morning. If done gently, daily shampooing will not damage your hair. The amount of washing will depend on the type of your hair, the weather, your physical activity, and perhaps even your occupation.