Let's simply learn about Acetylcholine (ACh): Our body's secret messenger!

Have you ever wondered how much work goes on inside your body, without you even realizing it? Think about it, your heart beating, your breathing, your remembering a face you've seen, your moving your arms and legs... All of this doesn't happen for nothing. Behind all of this are tiny chemical messengers. Today, we're going to talk about one of those very important messengers in our bodies. Its name is acetylcholine, or (ACh) for short.

So who is this acetylcholine (ACh)?

Simply put, acetylcholine (ACh) is a type of chemical called a neurotransmitter. Think of it like a telephone connection between our brain and the rest of our body. So these (neurotransmitters) are like 'messengers' that carry messages back and forth across that connection.

Acetylcholine is an excitatory neurotransmitter. That means this messenger goes to the next nerve cell and "wakes it up," "gives it a good nudge," saying, "Okay, now it's your turn, carry this message forward."

It gets its name from the two substances it is made of. It is an acetyl group and a nutrient called choline. We can get this choline from food. It is found in things like egg yolks, soy, and vegetables and nuts. It is also produced by our liver.

Acetylcholine performs many important functions in our bodies. It is especially essential for voluntary muscle movement . It also plays a major role in brain functions such as memory, thinking, and learning new things .

How does this form inside our bodies?

We have an enzyme in our bodies called 'choline acetyltransferase'. Think of it like a chef. This enzyme is what combines the previously mentioned choline and the acetyl group to create the delicious messenger acetylcholine (ACh). This process happens at the ends of our nerve cells.

Okay, now let's see how this message travels.

After acetylcholine (ACh) is made, it is stored at the end of a nerve cell, like a stack of letters in the post office. This stored ACh is released when a message arrives from the brain.

Then this ACh jumps into a tiny gap between two nerve cells. This gap is called the synaptic cleft. Think of it like a message jumping across a river.

The nerve cell next to it has special places to catch this incoming ACh. To be precise, it's like a key that fits a key. We call these receptors. There are two main types of receptors for acetylcholine:

1. Nicotinic receptors

2. Muscarinic receptors

When the ACh key binds to one of these two Ibi keys, the message is passed on to the next cell. In this way, the message passes from cell to cell and reaches the appropriate location (for example, a muscle).

What are the main things that acetylcholine (ACh) does to our bodies?

Acetylcholine (ACh) has a wide range of functions. Its function varies depending on the receptor it binds to. Let's look at its main functions.

Both types of receptors are involved in everything from maintaining our memories, to forming new memories, storing them, and recalling them . They are also very important in the brain, for our attention, our willingness to learn, and the deep sleep stage called REM (Rapid Eye Movement) sleep.

What diseases can occur if this is reduced?

A decrease in the level of acetylcholine (ACh) in our body can lead to several serious medical conditions. The main ones are:

• Alzheimer's disease: This is a disease that primarily affects memory. It has been found that people with Alzheimer's disease have significantly lower levels of acetylcholine in the brain.
• Myasthenia gravis: This is an autoimmune disorder. This means that our body's own immune system works against us. What happens here is that our antibodies go and damage the acetylcholine receptors (ACh) in the muscles. Then the ACh is unable to send the message, so the muscles gradually weaken.
• Lambert-Eaton myasthenic syndrome: This also causes muscle weakness. But the cause is different. What happens here is that the nerve cells do not release enough ACh.

Other things that affect acetylcholine (ACh)

Sadly, some have used the knowledge of how acetylcholine works to harm people.

For example, nerve gases like sarin and some insecticides work by inactivating the clearing enzyme acetylcholinesterase that we talked about earlier. This allows ACh to accumulate, paralyzing muscles and even causing death.

Also, when ingested, black widow spider venom causes ACh levels to rise dramatically. This can cause severe muscle contractions, twitching, and paralysis, and even death.

Are there any medications that target this?

Yes. Drugs that target acetylcholine are used to treat some medical conditions.

The main class of drugs is 'cholinesterase inhibitors'. These drugs work by blocking the enzyme that breaks down ACh. This allows ACh to remain in the space between nerve cells for longer, increasing its activity. These drugs (e.g. donepezil, rivastigmine) are used to treat conditions in which ACh levels are low, such as Alzheimer's disease and myasthenia gravis .

Another example is Botulinum toxin , or as we all know it, 'Botox'. It works by blocking the release of ACh from nerve endings. This causes the muscles to relax rather than contract. It is used for cosmetic purposes (to reduce wrinkles) and to treat conditions such as migraines.

Can we take this in pill form? Can we get it from food?

Acetylcholine (ACh) itself cannot be taken as a pill. However, the nutrient that helps make it, choline, can be taken as a supplement. Some herbal supplements, such as Ginkgo biloba, are also believed to affect ACh levels.

But here's something you should definitely remember . Never use any supplements without first consulting your doctor or pharmacist . They can interact with other medications you're taking, or they can be harmful to you.

But we can get choline naturally from food. Some of the main foods that contain it are:

• Beef liver
• Eggs
• Beef
• Soybeans, chickpeas
• Chicken
• Cod fish
• Quinoa
• Mushrooms, broccoli
• Milk