Once you reach the age of 90, your time in deep sleep drops to just two hours.

I was really busy this past week. I was in Tokyo on Monday, Hiroshima on Tuesday, and arrived in Hakata after being delayed for 10 hours, then Kumamoto on Wednesday, Kusatsu on Friday, and Tokushima on Saturday...Yesterday in Tokushima, I participated in a panel discussion at the Health and National Conference with a professor from the Tokushima University School of Medicine and the president of the Tokushima Architects Association. Professor Rokutan from Tokushima University is an authority on stress research, and I was able to learn a lot about intestinal flora and sleep, which are of great interest to me personally.
The professor has done a lot of research on sleep, and he says that people over 90 years old can only get two hours of deep sleep on average. This is not based on a subjective survey, but on a huge amount of statistical data obtained using bedding that can measure delta waves and tossing and turning.
He also said that 80 to 90 percent of the elderly feel that they cannot sleep. Therefore, the overwhelming majority of the medicines that the elderly ask for are sleeping pills and stomach medicines. Also, it seems that many people have no appetite, but there are almost no medicines that increase appetite.
So, the professor collaborated with Calpis Co., Ltd. to develop the CP2305 strain, a lactic acid bacteria drink called Premier Lactobacillus gasseri, which he presented at a conference in the Netherlands.
It was commercialized last year.https://www.calpis.co.jp/cp2305/
What's revolutionary about this lactic acid bacteria is that it has the effect of increasing appetite and helping you sleep better.
There were no bacteria that were effective, but it seems that you can often feel the effects after just one dose.
However, only half of people will see clear results, and the other half will not see much effect no matter how much they take.
I heard that there was no effect. I ordered it right away. I'm looking forward to seeing the results!