This post is a work in process. It is to be updated and completed in a future article.
To improve sluggish digestion, you could try digestive enzymes. This is not to endorse these supplements nor this company, but a list of frequently asked questions about enzymes is here. A summary of “Enzyme Nutrition” by Dr. Edward Howell MD is here. For details, read the book.
He shou wu (Polygonum multiflorum), also known as Fo Ti, is called the king of herbs. Note that this presentation is by Hyperion Herbs, a supplier of he shou wu. You are not required to buy from them to listen to the video, nor is this an endorsement of them in any way. He shou wu, depending on the batch, can have a lot of zinc in it. It is thought to be healthy for the hair, nails, and skin.
Published research also indicates the utility of CBD to relieve various conditions.