Nutrition In Boxing

For the past few weeks, I been around boxing again, and one question that have open my eyes has being nutrition.
While in the past, I used to work with overweight person and have achieved almost excellent on dropping them to their desired weight.
Now its different, I am trying to bring fit boxer to a weight class. Fighter blow (weight) between fights, and coming back to make weight sometimes is grueling, hard, and very painful. For a fighter the goal is loose weight and stay strong, Boxing is a sport that demands energy from our body system.
Boxing Requires a high-level of strength endurance to always attain trowing powerful combination punches, jabs, speed, flexibility and agility. and on top of that work road, which translate to speed work (Short Sprint and Long Sprint) and endurance (3 to 10 Miles running) depend on how many rounds a boxer is fighting could be 4, 6 or 12 round.
By saying that a nice high-carbohydrate diet to maintain stamina, refill lost glycogen stores. Mixed with a percent of Fat, and the other percent coming from Protein
Eating healthy is the key to a healthy and fit boxer. Some of the stuff that a fighter should be and shouldn't be eating like;
DON'T
Junk food,Try to avoid water-like substances such as sodas, juice or lemonade. Although these may contain water and some carbohydrates, they also contain a greater amount of the wrong type of carbohydrate which can eventually lead to decreased performance. Avoid high-fructose corn syrup and excessive table sugar, even when trying to gain weight. These include candy, juices, desserts, baked goods, etc
DO;
Drink plenty of water, sport drink like Accelerade, G2HO, Endurox, Getoreade. Choose healthy fat sources such as nuts, avocadoes and fish. Grill, Steam turkey, chicken, eggs(WHITE), fish ,lean cuts of beef, tofu, low fat cottage cheese.Fiber grains, vegetables, fruits, and cereals. Low Residue Foods
Low-fiber cereal (corn flakes, rice bubbles),White bread,Jam, honey,Juice, low-fat,milk, sports drink,Tinned fruit,Jelly,Clear soup (e.g. chicken broth),White pasta
White rice,Tomato based pasta sauce,Liquid meal (Meal Replacement Shake.

By all these saying a fighter is a endurance ATHLETES, and need plenty of food derive of energy.