slimfast keto

Are SlimFast Products Keto-Friendly?

There probably isn’t a person who hasn’t at least heard about the SlimFast programs and their meal replacement shakes, bars, or cookies that are supposed to help you shed some pounds. 

The idea sounds good in theory- just grab something from their product lines and go, no prep or thinking about meals. 

But their products are known to be high in carbs, which is definitely not suitable for a keto dieter. However, in recent years they have made a new edition to their programs, a SlimFast Keto program, where they reduced the carbohydrates in their formulas. 

So, is SlimFast Keto turning the tables and offering keto-friendly meal replacement products that you can actually eat and stay in ketosis? Keep on reading to find out.

What Is SlimFast?

SlimFast is a brand that has been on the market for over 40 years. They offer diet plans that help with weight loss using their meal replacement products.

They have a simple system where you need to replace 2 of your daily meals with one of their shakes, cookies or bars, and have one sensible meal that you can choose that is up to 500 calories and three 100 calorie snacks. 

They advertise that their meal plans should give fast and big results as soon as after one week of using their products. 

They have 5 lines of diet plans that contain different formulas to satisfy the needs of many different people. Those lines are the SlimFast Original, SlimFast Advanced Nutrition, SlimFast Advanced Energy, SlimFast Keto, and SlimFast Diabetic Weight Loss Formula.

Their SlimFast Keto line is their most recent addition and with their words- it is supposed to be the perfect choice to make optimal low-carb, ketogenic nutrition as easy as 1-2-3.

Slimfast Keto Products

At the moment they have 5 keto lines of products and those are Keto Meal Bars that contain 5 flavors, Keto Shakes that have 3 flavors that come in a package of 2, Keto Snacks with 6 flavors, they have 3 different flavors of Keto Shake Mixes, and they have a line of Keto Basics that contains 4 products. 

Nutrition Facts

Here is the nutritional information on 1 serving of 1 product from each of the SlimFast Keto product lines of the SlimFast Keto Diet Plan

ProductCalories/Serving SizeProteinFatTotal CarbsFiberNet CarbsErythritol
Keto Whipped Peanut Butter Chocolate Meal Bar190 kcal/ 1 bar7 grams14 grams15 grams9 grams3 grams2 grams
Keto Creamy Milk Chocolate Shake To Go180 kcal/ 1 bottle 325 ml8 grams14 grams7 grams5 grams2 grams
Keto Caramel Nut Cluster Fat Bomb80 kcal/ 1 cluster 20 grams2 grams6 grams10 grams6 grams2 grams2 grams
Keto Fudge Brownie Batter Mix190 kcal/2 scoops 37.9 grams8 grams15 grams9 grams2 grams4 gramas3 grams
Keto Creamer80 kcal/ 2 tsp 12.5 grams<1 gram8 grams3 grams0 grams3 grams


Here are the common ingredients that are in all the listed products: Salt, Soy Lecithin (except in the creamer), Stevia Leaf Extract (except in the creamer), MCT Oil, or MCT Oil Blend.

The following are the additional ingredients of each product.

Keto Whipped Peanut Butter Chocolate Meal BarButter Blend, Soluble Fiber (isomalto-oligosaccharide From Tapioca), Protein Blend (whey Protein Isolate, Milk Protein Isolate), Unsweetened Chocolate, Cacao Nibs, Inulin, Erythritol, Peanut Flour, Natural Flavor, Glycerin, Sunflower Lecithin, Extract, Natural Vanilla Extract, Cultured Dextrose, Mixed Tocopherols. Vitamins And Minerals
Keto Creamy Milk Chocolate Shake To GoWater, Milk Protein Concentrate, Cocoa, Maltodextrin, Cellulose Gel, Cellulose Gum, Potassium Phosphate, Natural & Artificial flavors, Potassium Citrate, Sucralose
Keto Caramel Nut Cluster Fat BombCaramel [Inulin, Soluble Corn Fiber, Glycerin, Water, Palm Kernel Oil, Cream, Milk Protein Concentrate, Butter, Natural Flavors], Chocolate Coating (Chocolate, Erythritol, Inulin, Cocoa Butter, Milk, Vanilla), Peanuts
Keto Fudge Brownie Batter MixProtein Blend (whey Protein Concentrate, Whey Protein Isolate, Grass-fed Collagen Peptides), Cocoa, Erythritol, Natural Flavors, Xanthan Gum, Silica, Dextrose, Monk Fruit Extract, Guar Gum. Vitamins And Minerals: Vitamin Blend, Mineral Blend 
Keto CreamerKetogenic Creamer Blend, Maltodextrin, Silica, Himalayan Pink Salt

Can You Consume SlimFast Keto Products On The Keto Diet?

When we analyze the nutritional facts table, we can see that there are not many net carbs in SlimFast Keto products that may make it seem like they are great for the keto diet. 

If you look into the ingredients, you can find natural ketogenic sweeteners like stevia leaf extract and monk fruit extract, but, when you look closely, you will notice that some ingredients aren’t exactly strictly ketogenic, actually, they are far from it.

Dextrose being one of them, it is a simple carbohydrate made from corn that is chemically identical to glucose (blood sugar) and it is a 100 on the GI (glycemic index) scale, meaning it can definitely affect ketosis. There is also maltodextrin that also has a high GI. (*

You may notice that their products are high in fiber, but all that fiber comes from mainly two sources- soluble corn fiber and isomaltooligosaccharides (IMOs). 

Both are popular in cheaper “no sugar” products for keto dieters and diabetics since it was thought that they did not raise blood sugar. But, after they consumed products with soluble corn fiber or IMOs, people noticed that their sugar levels spiked.

And, recent studies on metabolism have discovered that soluble corn fiber is in fact affecting blood glucose and has a GI of 25. Researchers also conclude that IMOs are actually a slow-digestible carbohydrate. (*), (*)

If that was not enough to give you an idea whether it is keto-friendly or not, SlimFast products are highly processed and contain soy, have artificial flavors and artificial sweeteners like sucralose, and even though not all keto dieters avoid it, strict keto dieters sometimes choose to avoid it. 

Plus most of their products are low in protein and with their low calories, you are probably not going to be full most of the day. 

To sum everything up, SlimFast Keto line is not recommended for those on the strict keto diet, but they’re ok for people who follow a low carb plan or ‘dirty keto’ version.  

Where To Buy?

You can find SlimFast Keto products in grocery stores like Walmart, HyVee, Publix, Kroger, Wakefern, Ahold, Meijer, and online at their store on

Bottom Line

Is SlimFast keto-friendly?

No, it is not STRICTLY keto-friendly as it contains many ingredients that may affect blood sugar. However, it’s great for those who don’t follow a strict keto diet and those who simply eat low carb.


Using SlimFast Keto will most likely give you fast weight loss results, but that may not be from you being in ketosis, but it is more likely because of their low-calorie meal plans which come around 1100 calories for women and 1600 calories for men. 

But, that doesn’t mean that the weight loss will be sustainable. If you want to lose weight and keep it off, but in a healthy way, then eating ketogenic whole foods and consuming healthy fats will give you those results and plus you’ll be fuller and happier too. 

Are SlimFast Products Keto-Friendly?
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