Does man change every seven years? [WE EXPLAIN]

You may have heard the statement that the human body changes completely every seven years. This, in turn, leads to philosophical considerations: do we become different people as cells change in our body? However, we decided to look at the first issue. Does our body actually undergo a “reset” of cells once in seven years?

1. The human body changes all the time. Some cells die in order to be replaced by new ones
2. Our nails also grow and our hair falls out. This means that after a few years of life, we no longer have the same plate and not a single hair that was on our head at the beginning.
3. How long does this whole process take? We check
4. More information can be found on the Onet homepage

How does the human body change?

Of course, the human body changes all the time. It grows first, then it matures, and then it starts to age. But the seven-year myth is about a slightly different process. It’s no secret that the hair on our head or body grows and eventually falls out. The nail plate is similar – it grows, we shorten it, and it pushes forward all the time. It is enough to look at the heavily bruised nail, under which a hematoma has appeared. Over time, the black and red mark moves upwards and eventually disappears completely.

Our skin is also constantly changing (that’s why we make peels – to get rid of the old one and give space for the development of the new one). This is what happens with almost every cell in our body. It arises, dies, and in its place a new one is created. Almost with everyone, because this process is not subject to neurons located in the brain. When they die (for example, from alcohol abuse or due to diseases such as parkinson’s), the body no longer makes new ones in their place. This process is unfortunately irreversible. The human brain does not regenerate.

The rest of the text is below the video.

How many times does our hair change?

Hair, whether on the head, face or armpits, has a limited lifespan. This means that when they are “at the end”, they will not be helped by any nutrients, treatments or specialist treatments. It is assumed that every hair must come off after a few years. On average, it is six years for women, and three years for men.

In practice, this actually means that after seven years, your body will not have a single hair that grew out of the root seven years earlier.

How many times does our skin change?

We know perfectly well that the skin peels off and dies, and a completely new one grows in its place. Every night, a huge amount of skin cells remains in the bedding, becoming a breeding ground for the mites living in it.

The skin cells are replaced very quickly. We have a completely new skin after only two to four weeks.

How many times do the nails change?

This question is a bit more difficult, because it depends on the length of the plate, how to shorten it, and also on the individual growth rate. What is certain is that if we completely lose a toenail (e.g. as a result of an injury), it will grow back in about six months. In the case of the toes, it will be around 12 months.

So it can be assumed that after this time your nails are completely new nails.

How often are bones replaced?

Human bones have a tremendous ability to regenerate. Bone cells replace almost instantly, but it takes a decade for this process to be complete. And that’s only for young people. The older we get, the slower this process becomes. Moreover, over time, bones become thinner and more prone to fractures.

How many times do cells in the liver, stomach or intestines change?

Every human organ is made up of different types of cells. So they are also found in the stomach, liver and intestines. And they all have a relatively hard life – the stomach is exposed to caustic acid, the liver is constantly fighting toxins, while the intestines try to excrete anything we don’t need.

No wonder then that the lifespan of such cells is short. Both in the cells of the stomach and intestines, the exchange process takes place within about five days.

The liver is the toughest player in the organ. Despite exposure to toxins, full regeneration takes place after 150 – 500 days.

What about the seven years?

Seven years – new you? This slogan sounds catchy, but when confronted with hard data, it turns out to be just … a slogan. Because yes, seven years from now, all the cells in your body (except neurons and bone-building cells) will be replaced. But it won’t happen in an instant or even in a single year.

It is a process that happens all the time and does not end after seven years. Cells stop replacing only after death. And that brings us to another debunkable myth – hair and nails don’t grow after death.