If you are considering bariatric surgery, you may wonder how your diet will change afterward. It is true that learning to eat again after bariatric surgery can be a challenge. This is simply because routines will need to be changed and knowing what foods can be reintroduced at what times can be confusing.

The most important thing to remember post-operation is to stay hydrated, though. You should be having at least 96 ounces of drinking water a day in the weeks and months following gastric sleeve, duodenal switch, gastric bypass, or any other weight-loss surgery. Zero sugar sports drinks are also a viable option.

The all-liquid diet will help your body adapt to the surgery. In just a few days, the body will begin to adapt to the diet, producing hormones that will make you feel full with less food intake and reduce the feeling of hunger. Remember: your body will not be able to handle a large amount of water, so sip the liquid throughout the day and no gulping!

The introduction of foods

During the first two weeks after weight-loss surgery, you will only have hydrating fluids and liquid protein supplements (including vitamins and minerals). After those two weeks, and incrementally for the next few months, soft and then solid foods are introduced to the body. It is still important to remain hydrated, though.

That’s where vegetables can help! Vegetables such as iceberg lettuce, cabbage, and cauliflower are a great source of water. The human body is made up of around 60 percent water. Some vegetables are 95 percent water! They will go a long way to satisfying your dietary requirements and help keep you hydrated.

Vegetable With High Water Content

Vegetables are an important part of your weight loss journey. They are packed with all sorts of things that are good for you. Antioxidants, anti-inflammatories, fiber, vitamin C, vitamin A, and others are all important parts of your diet. But not all vegetables are recommended because of their high carbohydrate content, including peas, winter squash, and potatoes.

Low carb vegetables are the best for your body as you recover from bariatric surgery. The veggies that are lowest in carbs and highest in water content, which is great for bariatric surgery patients, include:

  • Cucumbers – at 96% water, cucumbers are an outstanding source to keep you hydrated.
  • Lettuce – 95 percent water and can be used with almost any dish.
  • Celery – Also 95% water, celery is another great high-water vegetable. Just take it easy with the peanut butter.
  • Tomatoes – Up to 95 percent water.
  • Asparagus – Well over 90% water.
  • Bell peppers – 93% water.
  • Cauliflower – 92% water.
  • Spinach – Over 90 percent water.
  • Broccoli – Just under 90 percent water.


Looking at the bottom three vegetables on the list, you may be dreading your new diet. However, your veggies don’t need to be boring. When it comes to your new diet, creativity is key. Spice them up. Get creative with how you prepare your vegetables, so you don’t lose momentum in your journey of losing weight.

Herbs, garlic, spices, and lemon juice are your new best friend when it comes to making a bland plate of vegetables delicious and flavorful. Thankfully, mother nature has given you plenty of flavor options at your fingertips that are free of fat and calories.

WeightWise has compiled hundreds of recipes to help with your new, healthier lifestyle. Many of these recipes also include proteins for you meat eaters, just make sure to follow the instructions of your dietitian. The “full menu” of items you will be eating from here on out isn’t recommended for the first month as your body – and your mind – adapt to the new you.

Not sure where to start?

Our team at WeightWise understands that navigating changes in your diet after surgery can feel overwhelming. That’s why our nutrition experts are there to help. We will work with you to create a plan that works for you and your body.

Your diet is just one part of a successful weight-loss program. Every client will meet with a bariatric surgeon for an initial consultation. You will discuss what brought you to WeightWise, any family history or injuries that may affect the surgery and post-op plans, and any other questions you may have.

There will also be meetings with a dietitian and exercise physiologist to lay out a plan for a healthier lifestyle. This will include diet plans in the days before the surgery and for several months after surgery. Physical activity is a major component of any weight-loss and we will talk with you about cardiovascular health and improved flexibility.

Watch our free online seminar to see why so many people just like you have been so successful with our program. When you are ready to meet with us, we’ll be here for you. You can also contact us if you have any questions about insurance, what options are available to you, and expected recovery times.

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