When you are working on your weight, what you eat matters as much as how much you eat. Two nutrients come up often: protein and fiber. Water and portion sizes matter too. This guide shares general nutrition tips from the Dietary Guidelines for Americans, the National Institutes of Health (NIH) and the Centers for Disease Control and Prevention (CDC). It is not a personal meal plan, and your own needs may be different.
Start with the big picture
The Dietary Guidelines for Americans, 2025-2030, encourage eating mostly whole, nutrient-dense foods. That means protein foods, dairy, vegetables, fruits, healthy fats and whole grains. The guidelines also recommend cutting way back on highly processed foods, refined carbohydrates and added sugars.
The guidelines point out that the calories you need depend on your age, sex, height, weight and activity level. They also suggest paying attention to portion sizes, especially for foods and drinks that are higher in calories.
If you have a chronic health condition, the guidelines say to talk with your health care professional about whether you need to adapt them to your needs.
Protein at every meal
The Dietary Guidelines recommend that you "prioritize protein foods at every meal." They suggest a variety of sources:
- Animal sources: eggs, poultry, seafood and red meat
- Plant sources: beans, peas, lentils, nuts, seeds and soy
- Dairy: which the guidelines call an excellent source of protein, vitamins and minerals
The guidelines list a general protein goal of 1.2 to 1.6 grams per kilogram of body weight per day, adjusted for your calorie needs. This is a goal for the general public. Your clinician can help you decide what makes sense for you.
How you cook matters too. The guidelines suggest choosing baked, broiled, roasted, stir-fried or grilled foods in place of deep-fried ones.
Simple ways to add protein
NIDDK, part of the NIH, lists seafood, lean meats, poultry, eggs, beans, peas, unsalted nuts and seeds as protein choices. A few easy ideas:
- Add eggs or plain yogurt to breakfast.
- Stir beans or lentils into soups, salads and grain bowls.
- Keep unsalted nuts or seeds on hand for snacks.
- Build dinner around fish, chicken or tofu, then add vegetables.
Fiber, the filling nutrient
MedlinePlus, from the National Library of Medicine, explains that dietary fiber is found in fruits, vegetables and grains. There are two main types:
- Soluble fiber attracts water and turns to gel during digestion, which slows digestion. It is found in oat bran, nuts, beans and some fruits and vegetables.
- Insoluble fiber does not dissolve in water. It is found in wheat bran and whole grains, and it helps food move through your digestive system.
MedlinePlus notes that fiber makes you feel full faster, aids digestion and helps prevent constipation. It recommends 21 to 38 grams of fiber a day for older children, teens and adults.
Easy fiber swaps
The Dietary Guidelines suggest choosing fiber-rich whole grains and cutting back on refined carbohydrates such as white bread and crackers. NIDDK suggests trying whole-wheat breads and pastas, oatmeal or brown rice. You can also:
- Eat whole fruits and vegetables. The guidelines say 100% juice should be kept to small portions or diluted with water.
- Add beans, peas or lentils to meals.
- Choose frozen, dried or canned vegetables and fruits with little or no added sugar when fresh is not handy.
Go slowly. MedlinePlus advises adding fiber gradually over a few weeks to avoid stomach upset. It also suggests drinking plenty of fluids, because water helps fiber pass through your digestive system.
Hydration
The Dietary Guidelines call hydration "a key factor in overall health" and suggest choosing water, still or sparkling, and unsweetened drinks. The CDC notes that drinking water can prevent dehydration, which may cause unclear thinking, mood changes, overheating, constipation and kidney stones.
The CDC also points out that regular sodas, fruit drinks, sports drinks, energy drinks and sweetened coffee and tea contain calories but little nutrition. Its tips for drinking more water include:
- Carry a reusable water bottle.
- Choose water over sugary drinks.
- Add a wedge of lemon or lime for flavor.
- Ask for water when you eat out.
If you take a GLP-1 medicine, staying hydrated deserves extra attention. The Wegovy® Medication Guide says that diarrhea, nausea and vomiting can cause a loss of fluids, and that it is important to drink fluids to help reduce your chance of dehydration.
Smaller portions, eaten slowly
NIDDK explains that a portion is how much food you choose to eat at one time, while a serving is the amount listed on a Nutrition Facts label. The two are not always the same. NIDDK offers practical tips for managing portions:
- Use smaller dishes, bowls and glasses.
- Eat from a plate instead of straight from the box or bag.
- Eat slowly. It may take at least 15 minutes for your brain to realize your stomach is full.
- Try not to eat while watching TV, driving or working.
- Eat meals at regular times. Delaying or skipping meals may lead you to overeat later.
- When eating out, share a meal or take half of it home.
Questions to ask your clinician
- How much protein makes sense for me, given my health?
- Is it a good idea for me to add more fiber, and how quickly?
- How much fluid should I aim for each day?
- Would it help to work with a registered dietitian?
- Do any of my medicines affect what or when I should eat?
At Talvi, a licensed clinician reviews your health history before anything is prescribed. That conversation is also a good time to talk about your eating habits.
The bottom line
Building meals around protein foods, fiber-rich plants and water, and paying attention to portions, lines up with the Dietary Guidelines for Americans and advice from the NIH and CDC. These are general tips, not a personal plan. Your clinician can help you adapt them to your health and goals.