Adding coconut oil to diet helps to treat alzeimer's (according to book by dr. Mary newport). Do any healthtap doctors agree with this treatment?

NO. Coconut oil is not very good not recommended for much, i'd avoid it.
Alzheimers & coconut. Intriguing question. There's some relation between alzheimers and Insulin resistance. it's possible that the brain can use ketone bodies as fuel -- these are made in the liver when coconut oil is metabolized. dr. Newport's work suggests that coconut oil can be a part of alzheimer's treatment, but it's unlikely to be a complete cure on its own.