Carbohydrate-rich whole foods - such as beans, whole grains, and fruit - are recommended by every mainstream health organization.
The American Heart Association recommends whole grains, which are rich in carbohydrates: http://www.heart.org/HEARTORG/Health...49_Article.jsp
. A popular whole grain, brown rice, includes 85% of its calories as carbohydrates
The American Diabetes Association lists beans at the top of its "Top 10 Superfoods" list: http://www.diabetes.org/food-and-fit...uperfoods.html
. Pinto beans, a popular type of bean, includes 74% of its calories as carbohydrates
The American Council on Exercise recommends whole grains, which are rich in carbohydrates: https://www.acefitness.org/acefit/fi...ntastic-fiber/
The Academy of Nutrition and Dietetics (the world's largest association of Registered Dietitians and other nutritional professionals) recommends whole grains, which are rich in carbohydrates: http://www.eatright.org/resource/foo...family-healthy
Diets that are high in carbohydrate-rich whole foods have been shown to be effective for weight loss. An often-cited peer-reviewed study is "A Low-Fat Vegan Diet Improves Glycemic Control and Cardiovascular Risk Factors in a Randomized Clinical Trial in Individuals With Type 2 Diabetes" : http://care.diabetesjournals.org/content/29/8/1777
. In this 5-month intervention study of people with diabetes, people were placed on a low-fat vegan diet, with 75% of calories from carbohydrates. No calorie-restrictions were mandated, yet people still lost weight. The American Diabetes Association references these findings on its "Meal Planning for Vegetarians" webpage: http://www.diabetes.org/food-and-fit...r-vegetarians/
To quote the American Diabetes Association:
“A vegetarian diet is a healthy option, even if you have diabetes. Research supports that following this type of diet can help prevent and manage diabetes. In fact, research on vegan diets has found that carbohydrate and calorie restrictions were not necessary and still promoted weight loss
and lowered participants' A1C”
Several peer-reviewed studies have shown that higher intakes of whole grains (a high-carbohydrate whole food) are associated with lower body weight. Here are a few such studies:
Even potatoes, among the starchiest of foods, have not been shown to cause obesity or type 2 diabetes: http://ajcn.nutrition.org/content/104/2/489.abstract
potatoes ARE associated with obesity and other health problems).
In contrast, carbohydrate-rich processed
foods are not recommended by any mainstream health organization.
Based on this ample evidence, I think it's safe to say that high-carbohydrate whole foods are healthy.
Mainstream health organizations recommend that vegan diets include legumes, whole grains, fruits, vegetables, and small amounts of nuts and/or seeds (See this vegan nutrition guide, from Kaiser Permanente: https://share.kaiserpermanente.org/w...et-booklet.pdf
). Carbohydrates are the calorie-foundation of such a diet.
As with any eating style, one should not overconsume total calories.