5 Fascinating Facts About Human Hair You Need to Know

Did you know that an average adult human has approximately 5 million hair follicles all over their body?

Human hair is a natural part of our body that grows on our head, face, limbs, and even in hidden places. It has evolved over time from being a survival tool that kept us warm to being a means of expressing our personality and style.

Have you ever wondered why we have hair and what its purpose is? Well, the furry extension of our body is more interesting than you think!

We Have 100,000 Hairs or More

Did you know that an average adult human has around 100,000 hairs? On our head alone, we have up to 150,000 hair follicles. However, the number of hair follicles we have is determined at birth and is hereditary. People with naturally blonde hair tend to have more hair follicles, while those with red hair have fewer follicles.

There are also other factors that can affect the number of hairs we have on our body, such as hair removal, medication, and stress.

Our Hair Can Store Information

Believe it or not, our hair can store information about our biological makeup. For instance, white marks on our nails indicate a lack of nutrients or vitamins in our body when that part of the nail was formed. This can be used to determine if someone is malnourished or lacks certain nutrients.

Similarly, our hair can retain information about what we ingested. As we consume something, certain elements enter our bloodstream and can be deposited into the follicle of a growing hair. These chemical particles remain in the hair strand as it grows and can be used to determine if certain drugs were taken or if there was a lack of nutrients in our diet at a particular time.

Our hair carries these chemical particles with it as it grows, making it a fascinating source of information about our health and lifestyle.

The chemical particles present in a single hair strand remain there forever. Human hair has both strength and elasticity. It may not be as strong as steel, but it can hold more weight than a piece of copper wire of the same length and width. A whole head of hair combined can support the weight of two elephants. A single strand of hair can hold up to 3 ounces. Dry hair can stretch up to 1.2-1.3 times its original length, and wet hair can stretch up to 1.5 times. The growth cycle of a follicle involves growth, transition, and shedding. The average lifespan of a single hair strand is around 5 years. Temperature can affect hair growth, but there is not enough evidence to prove that warmer climates make hair grow faster. Cold air can make hair dry and brittle, leading to split ends. Our bodies get goosebumps or chills in cold climates as a way of trapping warm air between the hairs, creating warmth. Hair is a pretty cool feature of humans.

Importance of Food in Our Lives

Food is an essential part of our lives. It not only serves as a source of energy but also plays a significant role in our identity. We can use it to examine the things we have consumed and maintain our body temperature in colder regions.


1. Why does hair turn gray?

Hair turns gray because the pigment cells in hair follicles gradually die, causing the hair to lose its color. This is a natural part of aging and usually starts to happen around the age of 35-40. Genetics and lifestyle factors can also play a role in premature graying.

2. Why do some people have curly hair while others have straight hair?

The shape of the hair follicle determines whether hair is straight, curly or wavy. Follicles that are round produce straight hair while follicles that are oval or irregular produce curly or wavy hair. Ethnicity and genetics also play a role in determining hair texture.

3. Why does hair grow back after being cut?

Hair grows back after being cut because hair follicles are able to regenerate new hair. The hair growth cycle has three phases: anagen (growth), catagen (transition), and telogen (rest). When a hair is cut, it is in the anagen phase and will continue to grow until it reaches the end of the cycle.

4. Why does hair fall out?

Hair falls out as a natural part of the hair growth cycle. On average, people lose between 50-100 hairs per day. However, excessive hair loss can be caused by a variety of factors, including genetics, hormonal changes, medication, stress, and underlying medical conditions.

5. Why does hair become oily?

Hair becomes oily when sebaceous glands in the scalp produce too much sebum, an oily substance that helps to keep hair moisturized. This can be caused by genetics, hormonal changes, or over-washing the hair. Using a gentle shampoo and avoiding harsh styling products can help to manage oily hair.

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