Chamomile is a very gentle herb for children. You give them a little bit and helps them relax and fall asleep. It's very safe. For the heart, there are many herbs that are used. To improve circulation, you can use hot pepper.
Hot pepper stimulates vascular circulation.
If you're looking to reduce cholesterol, garlic and onions are among the two best things you can put in your body. There is an herb, actually it's a yeast, called red rice yeast. It naturally contains statins, which is the same class of compounds used in drugs for lowering cholesterol. In European medicine, hawthorn is widely used to improve overall heart function. The prevention of heart disease is best affected with a very healthy diet that's high in fruits and vegetables and fiber and low in meat and saturated fat.