Hello Sue, 

Dr. Carney has an article that might be helpful to you. It is titled "Are You "Dying to Lose Weight?"

https://www.drcarney.com/blog/health-issues/are-you-dying-to-lose-weight

There is also another article about how low-carbohydrates impair brain function titled "Can Low-Carb Diets Impair Brain Function?" which you might find helpful. 

https://www.drcarney.com/blog/health-issues/can-low-carb-diets-impair-brain-function

Let me know what you think of these articles. 

Sean

I just did a Google search to try to pull up results from nutritionfacts.org about the ketogenic diet and came up with many articles and videos that I think you might enjoy: 

https://www.google.com/search?q=nutritionfacts.org+ketogenic+diet

Thanks Sean! I found the one on brain function. The impact of this kind of dieting looked scary indeed! I put it up on my cooking club Facebook page. It amazes me the diets that emerge that are so dangerous to the body! I will take a look at the others. Thank you for your help!