Soy-Free Protein Powder: Soy You Later

Starting at $45.00

Mass-market protein powders sell you one-size-fits-all protein powder with hidden soy-containing ingredients. We keep it 100% soy-free.

Unflavored protein powder in 1 bag (854g) with 28 servings. Available in whey, whey concentrate, whey isolate, micellar casein and 100% plant-based proteins (organic brown rice protein and organic pea protein).

Weight Loss Icon Weight Loss Gluten-free Icon Gluten-free Soy-free Icon Soy-free Dairy-free Icon Dairy-free Vegan/Vegetarian Icon Vegan/Vegetarian Ketogenic Diet Icon Ketogenic Diet

A new protein flavor,
every day.

With only 2 grams of carbs and about 8 calorie per
stick, Gainful’s Flavor Boosts let you personalize your
protein powder while still fitting into your weight loss

Caffè Mocha Protein Bar Caffè Mocha Madagascar Vanilla Protein Bar Madagascar
Rich Cocoa Protein Bar Rich Cocoa Strawberry Cream Protein Bar Strawberry
Chocolate Peanut Butter Protein Bar Chocolate
Peanut Butter
Cookies & Cream Protein Bar Cookies & Cream
Protein Bars
Weight Loss

Your nutrition, personalized.

Our protein powder is customized to fit a wide range of
dietary restrictions, allergies, and fitness goals. We keep
it simple with clean, honest ingredients in the ratios that
are right for you.

Steph, 29 Your nutrition, personalized

Made for all lifestyles.

Our personalized protein powder gives you exactly
what you need, so you can train, focus and recover

The Gym Rat The Gym Rat The Runner The Runner The Yogi The Yogi The Athlete The Athlete The Crossfitter The Crossfitter The Dancer The Dancer
Weight Loss
Step 1 Take the quiz

Each order comes with up to 4 free flavors of your choice! Take the quiz to personalize your protein and customize.

Step 2 Enjoy your protein

Your order will include a month's supply of unflavored protein + single-serving Flavor Boosts.

Step 3 Try them all

With half a dozen delicious flavors to enjoy, you'll never get bored. Log in to choose Flavor Boosts for your next box.

Frequently asked questions

What types of protein do you have? Click to expand

Our personalized protein powder for weight loss is available in whey, whey concentrate, whey isolate, micellar casein and 100% plant-based proteins (organic brown rice protein and organic pea protein).

How do I contact my Registered Dietitian? Click to expand

There's nobody better to discuss nutrition or fitness with than your dedicated Registered Dietitian.

If you are a subscribed customer, send a message to your Registered Dietitian by logging into and navigating to the "My Dietitian" tab. Or, send an email directly to

Do you have a blend that curbs appetite? Click to expand

If you're looking to curb your appetite, we can match you with a versatile protein blend that can be used as a meal supplement or snack to help with appetite. However, our protein powder blends are still relatively low in calories, supplying most of their caloric content in the form of protein. No matter what you consume, a small number of calories will not make you stuffed for hours.

If you are relying on your protein powder solely to cure your appetite, we would definitely recommend adding some food items with it. You could simply eat some other healthy foods with it, or blend it up with a smoothie, adding fruits and vegetables, oats, peanut butter (or powdered peanut butter), etc. This will give you a wider variety of nutrients that will make you more satisfied. Oftentimes, eating just one thing will leave you hungry again soon.

Another option is a protein blend that contains more micellar casein. Casein protein is a very slow digesting protein, and will keep you a little more full since it releases over a longer period of time. Even with this casein protein, we still recommend adding it with other foods to help with appetite.

How often should I have protein powder for weight loss? Click to expand

In general, we recommend having one serving of your personalized protein powder per day. A single scoop per day will lend a significant boost in protein to support your weight loss.

If one of your primary goals is weight loss, you will likely receive a protein powder blend with a fairly low calorie count. However, your personalized blend will still contain a little more than 100 calories per serving. It is important to account for this in your overall daily calorie intake to make sure you are still maintaining a 500-1000 calorie deficit (the most important factor in gradual, healthy weight loss).

How does green tea help with weight loss? Click to expand

Foods like pomegranates and green tea contain naturally occurring antioxidants called catechins. Green tea extract is packed full of a special catechin called EGCG (epigallocatechin gallate), which has been shown to promote weight loss and prevent weight gain. As a thermogenic ingredient, GTE may help to boost your metabolism, increasing your body’s ability to burn calories.

For folks with a weight loss goal, we may also include a serving of green tea extract. Each serving of green tea extract contains a negligible amount of naturally-occurring caffeine (22.5mg per serving, less than 1/5th of a cup of coffee).

How many calories are in my blend? Click to expand

If you have completed the quiz at, you will be able to check out the full nutrition facts and ingredients breakdown for your personalized blend by logging in at

Read all FAQ

Customer Reviews

Rating star Rating star Rating star Rating star Rating star 11 Reviews

Julie Kesler 11/27/19
Rating star Rating star Rating star Rating star Rating star
I’m […] actually starting to see some real tone improvements.

Protein has historically made me gain weight. Not kidding, like infuriating amounts of weight. I’ve tried corepowers, muscle milks, egg white, whey… I couldn’t lose a pound if I was drinking protein. […] Tried gainful to see if it could help me. I’m finding it easier and faster to put on muscle and actually starting to see some real tone improvements. Mixes great with almond milk and some collagen and glutamine. Love the flavor change-up with the flavor sticks, makes it easy to get excited about drinking protein.

Angelica Chavez 03/12/20
Rating star Rating star Rating star Rating star Rating star
It’s helping me on my weight loss.

My blend is prefect the taste is great you don’t get that chalky taste like most protien shakes out there. It’s helping me on my weight loss.

Kenny Snook 03/09/20
Rating star Rating star Rating star Rating star Rating star
Love the product!

I have lost 30lbs on gainful and every person I contact helps answer my questions. Love the product!

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Ready to achieve your weight
loss goals with Gainful's
personalized protein?

Starting at $45.00

Take the quiz to personalize your protein powder.

  • Checkmark 14-28 servings of unflavored personalized protein (854g)
  • Checkmark 14 Flavor Boosts of your choice
  • Checkmark Free unlimited access to your very own Registered Dietitian
Gainful Protein Bars

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These statements have not been evaluated by the Food and Drug Administration.
This product is not intended to diagnose, treat, cure or prevent any disease.

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