However, some people try eating a high raw or all raw type of diet and do not feel well at all. There seem to be easy to fix reasons for at least many of these cases. This is based on my personal experience and the work of Gabriel Cousens MD, Dr. Robert Morse ND, and Doug Graham DC plus followers of Doug Graham's 80 10 10 diet.
Many people seem to do extraordinarily well, at least for a good period of time, on a fruit-based diet with a lot of raw vegetables and very little raw fatty foods. Fruit is the supreme hydrator and cleanser plus provides easy to metabolize fuel (simple sugar in the form of fructose as well as its esoteric energetic qualities). Greens provide important alkaline minerals to bring back more of a grounding balance. A little nuts, seeds, and avocado adds a bit more satiation and essential nutrients but not in a way that it becomes a very heavy diet. The diet is light and energizing with strong cleansing and clearing attributes.
Still, some people seem to feel less than optimal at some point with this approach. The interesting thing here is that for some, at least, easing up on the fat and protein restriction seems to remedy it. Some just add a bit more fat and protein either from raw sources or from things like cooked legumes. And then the satiation is higher and the energy and performance improves.
Some people do very well and feel balanced eating a very high raw green food diet with a focus on low sugar calorie sources like raw fats and protein. In this way, green juices and salads/soups become the norm. The greens seem to aid in energy well beyond their caloric load so though the carbohydrate content is low, it may be more energizing than a cooked carbohydrate diet. While some feel amazing on this, others feel sluggish with the emphasis on fats/protein and very little sugar. The raw effect doesn't seem to light them up and they feel like their energy is fading out. Some even seem to have digestion and skin problems. Others, though, find their remedy to these issues with this approach so it is individualized.
What you can take away, though, is that raw fruits and greens are the primary cleansers and moves of stagnant fluids. Fruits, in particular, are very powerful for deep cleaning work and flushing the system. If someone feels sluggish eating a diet high in low sugar, fatty foods, that person may do well eating a diet more focused on fruits with additional greens. If someone, though, feels weak or not satiated eating a fruit-based diet and they already tried upping the greens, they may feel more balanced to add in a little more raw fat/protein or even some cooked legumes. Or, they may want to try eating a lower sugar, green centered diet using fat and protein (raw nuts/seeds, avocados, raw oils like olive oil) as calorie sources beyond the carbohydrates from the greens. Adding in a little sea salt and/or seaweed like dulse may also be useful for those who feel unbalanced on a sweet-centered approach.
With all of that said, it does seem that a fruit-based approach is more suitable for deeper cleansing of the lymphatic system and helping to restore optimal kidney filtration so that waste products are moved out more effectively and healing and take place at a higher rate. Know your goals but also consider what you can do to feel more balanced if necessary while still improving your state of well-being.