Rate of hair growth predetermined genetically. But on an average hair grows at rate about 0.45 mm per day that is 1.36.Other than this which effect rate of growth is nutrition, hormones and environment. It is important that to check for vitamin deficiencies. This can be easily detected by blood test. Hormonal imbalance leads to hair loss rather than slow hair growth. One should not think that if lost your hair it is not going to grow back. In women PCOS cause hair loss once you treat PCOS hair will grow back. In men usually caused by androgenetic alopecia ,again it is a hair loss not slow growth of hair .Environmental cause are usually pollution, bad care hair care routine .Generally washing your hair regularly ,oiling it regularly and maintaining nutrition and lifestyle will help your hair.
This depends up on type of scalp. If it is dry scalp wash once in two days, if its oily wash daily. Oils are produced by sebaceous glands. If you have dandruff control it with doctor prescribed shampoo because because it also effects the kind of oil and surface.
Frizzy hair is caused by lack of moisture within the hair shaft. Cuticles on hair shaft overlap and lock in the moisture. When you damage your hair these cuticles open up and leak out moisture. Electric repulsive forces on your hair shaft also lead to frizzy hair .That is usually seen in more humid climates. In dryer atmospheres like Bangalore you need to give enough moisture by applying good moisturizer and good hair serum which is not oily and give a good oiling session once a week.

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