[pepsi_junkie]

Although brain lipids have high fat content, consumption of a diet containing excess fats and sugars has been shown to be detrimental ...

I'd look at the excess sugars as the problem before the fat. But that's just me.

[Grampa Dave]

This factor should be included in the discussion

However, myelin assembly requires a significant amount of lipids, and lipids play an important role in glial cell myelination.

My wife spent over 3 decades in a busy FP practice as the head RN, and your theory/notation of excess sugars was something she said was an early warning of hidden/impending bad health.

Re the teen/young adult diabetes and the early Adult onset of diabetes.

She has a problem not lecturing the X-large size teens and young adults buying bottles of sugar laced drinks and candy bars outside of stores for lunch or whatever.