This is a fantastic video that is well worth your time to watch:
The speaker, Robert Lustig, is an engaging, interesting speaker that will hold your attention and keep you watching.
The lecture is based on his book – Fat Chance: Beating the Odds Against Sugar, Processed Food, Obesity, and Disease. This book, in turn, stemmed from his phenomenally popular video Sugar: The Bitter Truth that came out 4 years ago and has over 4 million views.
He explains why a calorie is not just a calorie, while explaining the science and politics that have led to the explosion of chronic disease prevalence over the past 30 years, followed by strategies to beneficially adjust your hormones and improve your health.
Eclectic Kettlebell 
Awesome!