While the SlimFast diet plan has helped many people lose weight in the short term, it is not a long-term weight loss solution or a sustainable eating plan. Defining the optimal dietary approach for safe, effective and sustainable weight loss in overweight and obese adults. SlimFast is the satisfying afternoon shake when you finally have a moment to yourself, the peanut butter cup you grab as a treat, and the chocolatey after-dinner snack when you want something satisfying. The newer Advanced Nutrition Shakes and Smoothies provide more protein and less carbohydrate than the original shakes.

Verywell Fit uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. If you have bought SlimFast Advanced Vitality Strawberry + Blueberry Burst – Vegan Powder 450g and have an allergy or intolerance to dairy do not drink. Less positive reviews say that it can be challenging to stick to the diet in the long term, making it difficult to maintain weight loss.One 2018 study found that meal replacement shakes can be a safe, effective way for people with obesity and type 2 diabetes to lose weight and improve their glucose, insulin, and lipid levels. A smaller 2004 study of 63 people with obesity found that following the SlimFast plan for 6 months led to an average 7% body weight loss.

On the SlimFast plan, you can eat one calorie-controlled meal daily (500 to 800 calories) and three 100-calorie snacks. Quick weight loss is likely on the SlimFast diet, and proponents claim you can stay on the program as long as you like.

According to the company, each SlimFast shake contains 24 essential vitamins and minerals, along with 4–5 grams (g) of fiber and 10–20 g of protein, depending on the type a person chooses.

Most health experts recommend decreasing the amount of processed food you consume and increasing your intake of fresh or frozen fruits and vegetables, lean meats, seafood, and whole grains for optimal health. Weight management should fit your life, not BE your life – it should meet you where you are, support your goals, deliver results, and taste great doing it. One 2021 study indicates that people with a Mediterranean, low carb, high protein, or keto diet are less likely to have obesity.Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Journal of obesity, 1984; 8(4): 289-93; Chitosan: single blind placebo controlled clinical study on 92 overweight and obese subjects (25