Homeostasis is the key to wellbeing, but what is it? Find out here http://en.wikipedia.org/wiki/Human_homeostasis
All organisms have homeostasis balance and this is readily achieved in their natural environment eating their natural diet, disease rarely occurs in nature, the main insults are usually parasitic or environmental.
Humans on the other hand, mainly eat a very unnatural diet and live and work in unnatural environments and suffer homeostasis imbalance, immediately presented by obesity and or many illnesses, all of which are due to the unnatural environment and/or diet. The foremost reason for imbalance is diet and the factor over which we can have the most control.
If diet can reset one’s homeostasis many problems can be resolved almost immediately. The best diet to reset homeostasis is a ketogenic diet, this is approximately by calories; 75% Fat, 20% Protein and 5% Carbohydrate. Carbohydrate consumption should be no more than 50grams net per day. All from real foods and fats i.e.; meat and offal, fish and seafood, eggs, cheese, cream, olive oil, coconut oil, butter, nuts, berries and above ground vegetables. All this real food can be eaten to satiety, as much as you like, homeostasis will quickly regulate your appetite and prevent hunger.
This not specifically a weight loss diet! It is a diet to promote wellbeing and prevent chronic illnesses. By happenchance, should you be carrying extra weight as most people are, your weight by virtue of homeostasis, will naturally reduce to your natural weight, whatever that might be.
Nobody can live for ever, but we have the right to a long and healthy life and the right to keep our marbles to the very end, dementia is a metabolic disease too.