Although whey protein powder is a popular supplement on the market, it's important to keep in mind that if you're sensitive to dairy or are lactose intolerant, this may not be the best match for you. One reviewer in particular mentioned that they've tried every whey protein powder on the market, but Legion's remains their favorite because it's creamy and has the best taste. Most reviewers on Amazon love the Legion protein powder flavors because they mix well and they're easy to digest. This protein powder comes in 13 different flavors, and although it costs a little more compared to other whey proteins, it's highly rated by users. Legion Whey + Whey Protein Powder is made up of 100% natural grass-fed whey isolate protein and is 100 calories per serving, low carb and low in sugar. It's a favorite because it mixes well, tastes good and aids in muscle growth. Why I chose it: Whey protein is the most popular type of protein powder. Servings per container: 30 (per 2-pound container) If you want a well-formulated supplement that is made to fit your needs and don't mind paying a little extra, then Gainful is a good option for you. You also have the option to add Gainful's hydration powders and pre-workout for an extra charge.

Though it's on the pricey side, your $45 order includes your customized protein powder and the Flavor Boosts. Gainful emphasizes that its product is created by registered dietitians on its Science Advisory Board that have worked with elite athletes.

With your subscription, you're able to add four new Flavor Boosts, which are available in over nine flavors, ranging from cookies and cream to strawberry cream. To start, Gainful has you fill out a questionnaire on its site to determine the best protein powder formula for you. The brand also provides subscribers with complimentary access to a registered dietitian to answer any of your dietary and fitness questions. Why I chose it: Gainful is a subscription-based protein powder brand that creates personalized protein powders specific to your dietary needs and exercise goals. Servings per container: 14 servings per pound

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