It is really a speech he gave several years ago

Once again, he covers - in detail - the biochemistry involved in eating vegetable oils vs saturated fats.

His hypothesis is that it is the increased consumption of vegetable oils over saturated fats that has driven the obesity problem in the US.

I didn't understand or follow most of his discussion of the chemistry - but his conclusions are clear.

He is impressive in his knowledge of the chemistry of physiology.

https://www.youtube.com/watch?v=qMO-5mq3crU