Yes, it's really helpful for your nutrition and when you're tired. But are you sure about stress level and nervousness? Maybe hot tea, but I'm not sure about such help of hot water, sorry.
Agreed. It really gives a lot of benefits to our body. There is an old woman aged 60-70 years old who lives in one part of Asia that really looks young like a teenager and her secret of health and beauty regime by drinking warm water early in the morning and before taking a rest at night. That's her daily routine and it works.