NHS Choices suggests:
"To maintain a stable weight, the energy we put into our bodies must be the same as the energy we use up through normal body functions and physical activity. An important part of a healthy diet is eating the right amount of calories; balancing the energy you put into your body with the energy you use.
"As a guide, men need around 2,500kcal (10,500kJ) a day to maintain a healthy body weight, and women need around 2,000kcal a day (8,400kJ).
"A healthy diet is not only about eating the right amount. It also means eating a wide range of foods to ensure you get all the nutrients you need. You can still eat less when following a balanced diet. Learn more about a balanced diet in the Eatwell Guide. "
I would struggle to eat 2000 calories a day and I would also struggle with NHS dietery advice as they still push the old low fat high carb advice. . I do listen to dieticians more than 'nutritionists' but with every bit of my being I can tell you that I do eat well - good as in non-processed and whole foods, a range of carbs, proteins (plant based) and healthy fats (olive oil, some nuts and seeds, avocado) and a range of fruit and veg. I have been interested in nutrition for a long time and read a lot and enjoy cooking. if I was eating, for example, a lot of white bread, cakes, biscuits and soft drinks then yes, I can see your point in adjusting my diet. But how can I make it any healthier? here is my sample menu (from today)
Breakfast. Coffee with almond milk. Porridge oats with: blueberries, flax seeds, pumpkin seeks
lunch, vegan cheese sourdough sandwich, soya milk flat white
dinner: veggie burger, salad (including green leaves beetroot and tomato)
water... about 4 glasses..