Why do we lose hair? The simplest answer we know is the genetic/hereditary coding of a human body which triggers hair fall or hair growth. Although, Hair fall or Hair loss is inevitable, the degree of extent up to which it occurs is a thing of concern. For some, it is barely noticeable but for some, it is distressing and agonizing.

Since I have to keep this post concise, I am not going to discuss the types of baldness in males.

Androgenic alopecia- It is a genetic condition that can affect both men and women. Men with this condition, called male pattern baldness, can begin suffering hair loss as early as their teens or early 20s. It's characterized by a receding hairline and gradual disappearance of hair from the crown and frontal scalp.

To put it simply, some hair follicles are sensitive to DHT (dihydrotestosterone) hormone while some are not. This is one of the major reason for premature baldness in males. Hair follicles present on the top of the head have those receptors with which DHT combines and produce an undesirable effect( hair loss).

During puberty male sex hormone Testosterone is naturally converted to a stronger and more powerful hormone called DHT (dihydrotestosterone) in the presence of 5-alpha reductase which is an essential androgenic sex steroid hormone for expediting secondary sexual characters in males. For instance, DHT promotes muscle mass and bone density, deepens the voice, burgeons facial hair.

DHT is analogous to friction-'a necessary evil'.

DHT stimulates androgenic hair follicles, not the regular head hair. Facial hair, pubic hair, axillary(armpit) hair all fall under the category of DHT stimulated androgenic hair follicles.

DHT exerts a positive proliferating effect on androgenic hair follicles. However, it exerts a negative toxic impact on the non-androgenic head hair. It kills the head hair follicles by swelling the skin where hair follicles are present which results in the blockage of the necessary and vital nutrients needed by the follicle to grow hair. Consequently, hair growth stages are severely affected. The anagen growth phase of the hair follicle keeps on shortening and thus, the hair will keep shortening and thinning too until no hair can be popped out from the epidermis layer of the skin.

Why doesn't it spread to the sides?

These DHT receptors on head hair are not evenly distributed, They may be more congregated on one region of the head than other. Thus, the more DHT  receptors present on a region, the more sensitive you are to DHT on this region, the more effect DHT exerts on this region (hair loss).

The temples and the crown are the most sensitive to DHT. This is why they are the first to be affected. The hair on the sides of the head is the least sensitive. As a result, minimal impact occurs by DHT.

Sanititzer's composition: 60%-70% (Isopropyl Alcohol /  Denatured Ethyl Alcohol)

Washing the hands with water and soap is being called the gold standard for hand hygiene. Still, practically it isn't possible to carry a personal sink everywhere. A small bottle of sanitizer can work wonders and is being used widely due to its effectiveness and portability.

The most common type of sanitizer uses Isopropyl Alcohol(Rubbing alcohol) or Ethyl Alcohol. Most of us think that we can consume ethyl alcohol aka ethanol but do remember, ethyl alcohol used in sanitizers is denatured(which means it includes a number of additives, thereby making it poisonous, unpalatable, and hence, undrinkable).



NOW THE QUESTION IS:

If a little alcohol is good at killing germs, Why stop at 65 or 70 per cent alcohol when you can go all the way to 100 per cent? Because it turns out 100 per cent alcohol is actually less effective at dealing with those cruel and wicked diseases.

• The simplest reason is the evaporation rate which needs to be capped otherwise the alcohol will vaporize without killing those germs, so the water content hinders the sudden evaporation of alcohol.    
• Using the 95% alcohol content makes skin dry and irritated                                                       
• Adding a few other ingredients, like hydrogen peroxide and glycerol, make the solution even more effective.                                                                               
• Isopropyl alcohol(Rubbing Alcohol) as compared to ethyl alcohol has a higher evaporation rate and hence the name.

Before getting into the topic one should know the meaning of the words Federal & Union.

Federal is an adjective which means having or relating to a system of government in which several states form a unity but remain independent in internal affairs.

Union, on the other hand, means the action of joining together or the fact of being joined together, especially in a political context.

To put it simply, the constitution which was made by Dr BR Ambedkar was for both Central government and the states. On the other hand, the Constitution made by Thomas Jefferson was only for the central government, this is why each state in America has its own written constitution.

In the case of India:

• Union/Central government has more control over the states.
• States must exercise their executive power in compliance with the laws made by the Central government(Article 356).
• No state government can impede on the executive power of the Central government within the states(Article 357).
• The Central government has the power to take over the state in matters related to national security( Article 352 to 360).

This is the reason why it is called 'a union of states'.

In the case of the USA:

• States have their own written constitution and are not controlled by the centre directly. For example, some states now allow the legalization of marijuana, both for personal and medical purposes. But federal law bans marijuana as a controlled substance.
• Under the Tenth Amendment to the U.S. Constitution, all powers not granted to the federal government are reserved for the states and the people.

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Wrapping up:
 Try to understand this whole scenario by taking the example of Jammu & Kashmir. Before 31st October 2019, although it was an Indian state, still it had a separate Constitution, National Anthem, Flag.
Similarly, the states of America have their own constitution which means they are made to unite but actually have considerable self-rule.