- I've been a patient for almost 20 years, first with Dr Cahn but I mostly see Amy Cheng these days. Both are have everything you'd want out of a caregiver: intelligence both mental and emotional, highly intuitive and adaptable and compassionate. Several years ago, Dr Cahn said, " look, your cholesterol is bad, you want to take medicine for it or work some kale into your diet? Your choice." Because he gets that it is my choice. I'm kale over drugs.