Recently, his book “Lifespan'' was published, becoming and became an instant best-seller.

In this aspect, it is worth mentioning that the professor himself, as well as his family, have been the main subjects of study, the guinea pigs, so to speak, of his anti-aging experiments.

In fact, when comparing a recent picture of the professor who is 51-year-old professor with one taken 10 years ago, you can immediately tell that he knows a thing or two about fighting aging.

He not onlydoesn't just looks young but, he looks shockingly younger than when he was 41.

As for the key to eternal youth, he consistently highlights the importance of fasting, i. Indeed, he suggests frugal meals and even skipping either breakfast or dinner to extend the period of fasting between meals.

In fact, latest research on the benefits of fasting in humans also proves the benefits of adopting this lifestyle.

Removed the first "benefits" to lessen redundancy.

One of them is Metformin, a medication indicattended for diabetics used to lower the blood sugar.

The other supplements he recommends are NMN, a molecule tohat helps restore the mitochondrial function, and Resveratrol, a molecule taken from grapes.

His investigations have had a great impact ion the field of aging, but he insists on the need to keep on investing in this area because aof research. According to his convictions, thelaims, human beings can live up to 150 years without any problems, but it is important to reach that age in good conditions.

"Convictions" isn't really used in this context; it's more used in court settings/implies a belief, rather than research (like Dr. Sinclair's research in this writing)

He has also said that the inspiration for his research is his father, a man in his 80s who, following his son’s protocol, has been able to rejuvenate, and who i. Instead of being at home watching TV, he leads a fulfilling life, and lookings forward to the future.

There are plenty of his conferences on the iInternet, and I highly recommend them.

Recently, his book “Lifespan'' was published, becoming and became an instant best-seller.

What you wrote is grammatically correct, but I changed it to feel a little more natural to myself.

In this aspect, it is worth mentioning that the professor himself, as well as his family, have been the main subjects of study, —the guinea pigs, so to speak, of his antiaging experiments.

In fact, when comparing a recent picture of the professor, who is 51- year-s old, with one taken 10 years ago, you can immediately tell that he knows a thing or two about fighting aging.

You would only hyphenate (number)-year-old when using it as a noun or adjective. (EX: That five-year-old is being very loud. EX: Her ten-year-old son is learning to play the piano.)

He nNot only does he looks young, but also he shockingly looks younger than (he did) when he was 41.

As for the key to eternal youth, he consistently highlights the importance of fasting, i. Indeed he suggests frugal meals and even skipping either breakfast or dinner to extend the period of fasting between meals.

This advice is based on scientific evidence, which consistently shows that underfed rats live longer and healthier lives in comparison to those who eat whenever they want.

In fact, the latest research on the benefits of fasting in humans also proves the benefits of adopting this lifestyle.

One of them is Metformin, a medication indicated for diabetics used to lower the blood sugar in diabetics.

The other supplements he recommends are NMN, a molecule tohat helps restore the mitochondrial function, and Resveratrol, a molecule taken from grapes.

His investigations have had a great impact in the field of aging, but he insists on the need to keep on investing in this area because according to his convictions, the. He asserts that human beings can live up to 150 years without any problems, but it is important to reach that age in good conditions.

He has also said that the inspiration for his research is his father, a man in his 80s who, following his son’s protocol, has been able to rejuvenate (what?), and who instead of besitting at home watching TV, leads a fulfilling life, looking forward to the future.

“Rejuvenate” requires an object. Rejuvenate what?

There are plenty of hiSinclair’s conferences on the internet,; I highly recommend them.