Arthur Guyton’s Textbook of Medical Physiology states "the total amount of water in a man of average weight (70 kilograms) is approximately 40 litres, averaging 57 percent of his total body weight. In a newborn infant, this may be as high as 79 percent of the body weight, but it progressively decreases from birth to old age, most of the decrease occurring during the first 10 years of life. * This all means that our entire body, including our hair, needs a constant supply of water to be healthy.
Water also makes up 25% of our hair shaft. Our roots draw water from inside our skin and transport it to the tips of every hair. Logic thus dictates that in order to keep that much water in our hair shaft, we must do it from the inside out. Water is an absolute necessity for healthy skin and hair nourishment. For well-hydrated cells, we must drink adequate amounts of water. This can mean the difference between having moisturized, healthy growing, and radiant natural hair or dry, brittle, and lifeless hair -caused by chronic dehydration of natural hair.
Healthy Hair Regimen
Although there is no single, strict regimen that everyone should adhere to for assured growth of natural hair, there are common factors that apply to all. Lifestyle, diet and hair type must factor into a healthy hair maintenance routine.
An active lifestyle that includes regular exercise helps stimulate the blood flow. Nutrient-rich blood nourishes the hair follicles and this promotes healthy hair growth. Insufficient blood flow from a sedentary lifestyle won’t help the hair follicles. Additionally, stress is known to cause hair loss and a good exercise routine helps eliminate stress. So, exercise is another great aid to prevent hair loss and promote hair growth. Finally, when we exercise, we avoid chronic dehydration because our bodies crave…guess what? Water.
"Hair type" is a hot topic in current news. Hair type can be straight, curly, and various textures. Basically, our hair type help determines the way we would care for and maintain our hair for healthy hair growth. A simple example is that daily maintenance and styling of naturally curly hair is usually different than daily maintenance of naturally straight hair, even though all hair needs nourishment, proper cleaning and conditioning.
Diet and Nutrition
A well-balanced nutritious diet can help promote human hair growth. That means drinking adequate amounts of water. The vitamins and minerals you get from your healthy food will enter your bloodstream quicker when there is sufficient water to assist them to do their job. Water also helps your body eliminate toxins that can interfere with healthy hair growth.
Final Note on Water and Hair Growth
Don’t deprive your natural hair of this magnificent “water cycle” going on in our own bodies. If you do, you will not only damage your hair, causing it to become dry and brittle, it may stop growing permanently. Therefore, to help your natural hair reach its maximum growth potential:
Water your hair from the inside out!
*Guyton, Arthur C. (1991). Textbook of Medical Physiology (8th ed.). Philadelphia: W.B. Saunders.