I thought that I would respond to this topic as I have done some fairly extensive research over the last few years on this.
Bear in mind, this is my opinion based on what I have read, not scientific fact!
Keto or Low Carb Diets are not recommended long term - depending on what people mean by low carb eg 30 grams is low carb and essentially almost starving your body of vital nutrients. 100 grams is still low carb by today’s modern diets and seems to be recommended long term.
Keto may be good for quick weight loss and getting rid of toxins in your body quickly, but long term causes problems as you need more carbs.
Based on my research, I feel that a diet called The Perfect Health Diet is actually the right way to go. I especially like their Food Apple Diagram. Just googe it. However, I don’t follow their advice 100%
I feel that you need to completely cut out the following foods:
Sugar - anything with sugar
Sweetners - they are worse than sugar
Grain - breads, pasta etc. Flour is no longer what it used to be and we have far too much grain in virtually everything in the modern diet.
Coffee and Tea as a daily drink especially if you need sugar to have this. Rather move to Japanese teas and other drinks.
Having said that, I don’t completely cut out beer or ales - that in moderation is not really that big an issue. Cutting out sugar alone will solve a lot of people’s health problems, providing you eat more vegetables and fish.
This is based on Perfect Health Diet, Atkins Diet, Paleo Diet, Weston A Price and other things that I have read.
I have learnt to avoid the mistakes made by some of the people listed by not buying artificial vitamin supplements such as fermented Cod Liver Oil and other vitamin supplements on the basis that we just don’t understand the body well enough to be able to create supplements that work in harmony. All these people recommend supplements but I think that mother nature knows best.
Over the years, I have found little of everything and in moderation seems to work best and I think we need to eat far more vegetables and fish as a nation.
I can well believe that you can improve hearing and eyesight by eating a well nourished diet. There have been many cases of people saying that their muscles, walking mobility etc has improved when having a lot of bone broth, eyesight being improved by having a lot more vegetables etc.
If you take anything away from this comment, it is that I would not recommend Keto as a long term diet. More and more people are being diagnosed with things like kidney problems etc as a result of not getting enough carb. The key is not to cut out carb, but to replace simple carbs like donuts with complex carbs like spinach, carrots etc. Also you need starch such as potatoes.