Isopure Lactose-Free Whey Protein Isolate Powder, Creamy Vanilla

Last updated: February 8, 2023

Isopure Lactose-Free Whey Protein Isolate Powder, Creamy Vanilla

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We looked at the top Whey Protein Isolate Powders and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Whey Protein Isolate Powder you should buy.

Overall Take

Don't worry about overstepping your net carb goals when you use this whey protein isolate powder, as it's a completely carb-free product to help you boost your protein macros. The additional nutrients and electrolytes in this powder add an even stronger benefit as it helps round your diet out in areas that your food intake might lack.

In our analysis of 76 expert reviews, the Isopure Lactose-Free Whey Protein Isolate Powder, Creamy Vanilla placed 9th when we looked at the top 12 products in the category. For the full ranking, see below.

From The Manufacturer

Pack in powerfully pure protein, without packing on the carbs. Our 100% whey protein isolate powders amp you up, without any unwanted weight. Just pick your level: zero carb or low-carb (which also has zero sugar), both with 25 grams of protein per scoop. It’s 100% whey protein isolate loaded with vitamins, minerals and nutrients to keep you going strong—and always without gluten, lactose, or any impurities. Made with our complete microfiltration process to be the only completely clear milk protein when dissolved in water. Available in a range of delicious flavors to mix up some seriously delicious and dynamic recipes.When to consume – post workout or other strenuous activity. First thing in the morning. Between meals.

Expert Reviews

What experts liked

Effective. As the name suggests, a whey protein powder with no carbohydrates.
Isopure has really come up with a remarkable protein that’s jam packed with vitamins and minerals and can fit into just about any diet. For a whey isolate, that’s inexpensive, and the more you order the cheaper it gets: if you get a big 7.5lb tub it drops to about 3.5 cents a scoop. This is a big upside of the fact that Isopure is part of such a big company: it’s inexpensive, particularly given all the extra vitamins and minerals.
Isopure not only mixes well with water and cold liquids it also mixes well with warm or hot items. This is almost unheard of in the world of protein powders. Once mixed it will be smooth and free of chunks. You will find it easy to swallow and overall it has a great mouthfeel.
Each serving contains just 100 calories, so you can mix it with water or in a smoothie and you’ll still have a low-cal snack or meal replacement. The creamy vanilla flavor tastes great and mixes well with anything, while flavors like cookies and cream or mint chocolate chip will satisfy your sweet tooth if you have a craving.
There are no carbs in it. Helps with muscle regeneration. 100% recommended to lactose-intolerant people. It has vitamins and minerals. Its preparation is simple. It has glutamine, which helps the muscle to a fast recovery. It has a quick absorption.
Isopure Zero Carb contains 50 grams of protein in every serving! That’s twice the standard amount! This product also contains only 10 mg of cholesterol, which is one of the lowest I have seen! Almost no fat.
Isopure was the first protein powder to have 50 grams of 100% pure ion exchange whey protein isolate. It gets absorbed quicker and refuels and repairs tired muscles in an instant. All with little to no lactose, preservatives, fat, calories or carbs. Isopure’s whey protein isolate has a wide variety of flavors that are low carb including: Creamy Vanilla, Cookies & Cream, Toasted Coconut (Low Carb), Mint Chocolate Chip, Espresso, Strawberries & Cream, Dutch Chocolate (Low Carb), and many more.
50 grams of protein per serving (this is one of the highest on the market). It has many flavor options. Overall, it is a fine tasting protein powder. Many customers love it. It has no carbs. It has among the very highest protein amounts per serving of any protein powder on the market today.

What experts didn't like

Doesn't taste as good as other brands.
There’s no zero carb chocolate. Some artificial ingredients and the unusual flavor profile. Made in a facility with soy, egg, wheat, peanuts, tree nuts. Not that tasty.
Some flavors synthetic tasting. SOme flavors leave chalky feel.
According to some, the vanilla flavor is too sweet. With excess use, kidney stones can be developed. Dehydration can occur if you don’t drink enough water. You need to have a regular workout routine or you may gain weight.
It contains a rather high sodium count, which can potentially cause fat gain, and it uses whey protein isolate instead of the far superior: whey protein hydrolysate. I would personally not take Isopure Zero Carb.
One distinguishing factor of the Nature’s Best company is that they do not have NSF Certified for Sport registered GMP certification. This is highly desirable and an indicator of high product quality, but they do not have this certification.”GMP” stands for “good manufacturing practices” and is sometimes is represented as “cGMP” or “current good manufacturing practices.”


Eating enough protein during the day can be tough for those who are looking to ensure their muscles have the fuel they need for growth and recovery. Whey protein isolate powders are made to fill this need, as they are designed to be a high dose of protein with relatively low calories so they can be added to a normal diet easily.

Whey protein isolate is one of three types of whey that can be produced from the byproduct of making cheese. The other two types of whey are whey concentrate and whey hydrolysate. The primary difference is that whey protein isolate is the purest form of protein from the selection and therefore can be produced to have very little calories, fat and carbohydrates, with some even being lactose or cholesterol-free.

Whey protein isolate powder comes in many flavors and varying levels of carbohydrates and micronutrients, which can make your search for the right one a tedious and, at times, a daunting exercise that will have your head spinning.

The first thing you should do in this search for protein is set a defined goal for what it is you want to achieve by adding this protein supplement to your diet. If you’re beginning your journey towards exercising and increasing your muscle tone or definition, it’s important to understand your recommended daily calories, as well as how much protein you need to eat.

There are calculators online that can help you figure these numbers out. Find one that lets you input your body weight, age, height and the level of activity you have in your daily life. The output of these calculators will give you a great idea of what your lean body mass is and how much protein you need to consume every day to maintain that. Similarly, it will tell you how many calories your body burns during the day, which is the number of calories you would eat in order to maintain your current body weight.

There are whey protein isolates that have no net carbohydrates, which can be ideal for those attempting a ketogenic diet or even just a lower-carb diet. Some whey protein isolates are even packed with vitamins and micronutrients or electrolytes like magnesium and potassium, which can be tough to fit into some of our diets naturally.

Keep an eye on the serving size when you are reading the nutrition facts on any of these packages. It is a heavily debated topic in nutritional science, but it is widely agreed upon that our bodies can only process a certain amount of protein at one time. This means you shouldn’t just drink your entire daily limit of protein in one sitting as a means of getting it out of the way.

Rather, you will want to keep your single-serving sizes of protein in the range of 25-50 grams of protein so that your body can properly process and use it. If you are on the smaller size, mass-wise, you might just want one scoop of protein even if the serving size is recommended as two-scoops. This saves you money in the big picture, but also helps you pace your protein ingestion in a smart way.

It’s hard to know which brand will work well with your tummy, so it is a good idea to try a few different brands and flavors until you find the one that works harmoniously with your body.

On that note, keep an eye out for the various flavor offerings. You’ll often find chocolate, strawberry, banana, vanilla and unflavored powders. These can be mixed with water for simplicity, in which you will mainly get the exact flavor of the powder and not much more. Using protein powder as an ingredient in a smoothie is a really common way to consume it and you can find tons of recipes and information online that will aim you towards a really tasty protein shake.

Once you have defined your daily protein intake and calories, the rest is simply building your diet around these two criteria. If you’re lifting weights as a means of getting more toned while also losing fat, you might be better off with a low-calorie protein powder that will help you stay in the caloric deficit that you will need to lose weight.

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