This book is like many other books when talking about how the brain works and how its functioning could be enhanced (e.g., exercise, do new things, and solve problems). It is different in that looks at the advantages and disadvantages of the middle-aged brain. As we age, we may not be able to remember things or solve math problems as quickly as we used. Because of this, people think the middle-aged brain is declining. Surprisingly, the book reveals that the middle-aged brain can be at its peak. The brain has reorganized since its youth. It has built up patterns of connections and it acts and thinks differently. It is smarter, calmer, and happier. When a young worker is freaking out over a problem, an older worker is thinking, "Calm down. We've gotten through worse problems than this. First, let's figure out how bad the situation is." The middle-aged brain is using both sides, whereas the younger brain is using the untamed emotional side.
This book reassures us that as we age, our brain does not necessarily become progressively worse. We have more experience and knowledge, which have been applied repeatedly over time, strengthening connections in our brain. We make better judgments and decisions. It could be called wisdom, intuition, or gut feeling; these snap judgments come from our years of experience. We need to appreciate the advantages of a more mature brain rather than focus on the one negative aspect (forgetting things). It is also important that we exercise and keep our brain in top shape.
I've always wondered why the medical profession keeps changing what they considered to be a "normal" cholesterol level. First, there was one number. Then there was "good" and "bad" cholesterol. And all the while not really knowing what is a normal cholesterol level, they have been prescribing medication to millions of people to lower cholesterol. This book provides a lot of background on how all this misinformation started. There is also a lot of science explaining heart functions, cholesterol, saturated fat, trans-fatty fat, etc. This is useful if you suspect you may be candidate for heart disease and really want to understand how all elements affect your body. I found it technical and dull after a while. The book claims the real causes of heart disease are inflammation, oxidation, sugar, and stress... again more technical information.
It took a long time before the authors got around to their advice, which is taking coenzeme Q10 (better known as CoQ10) for individuals taking statins or at risk of heart disease. Statins deplete CoQ10, which may lead to muscle pain, weakness, and fatigue. Unless you had a heart attack before (to justify the taking of medication), the preferred action is to lower inflammation with natural supplements, eat a better diet, drink alcohol in moderation, don't smoke, exercise, and manage your stress.