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Whey Protein for Sensitive Stomachs
Your protein. A simpler routine.
Whey protein for sensitive stomachs
Choosing whey protein for a sensitive stomach starts with the protein source, full ingredient list, and how you mix it. Grow delivers 23–25g of New Zealand grass-fed whey isolate protein per serving. Compare the flavors below and keep your first shake simple. Grow contains milk, and individual digestive tolerance varies.
Grow
New Zealand grass-fed whey isolate. A straightforward protein choice when you want to look closely at what goes into your shake.
- 23–25g protein per serving, depending on flavor
- 100% whey isolate protein source
- 30 servings in every bag
- Contains milk; Peanut Butter also contains peanuts
Loading current purchase options… View Grow on the product page
- Grass-fed whey isolate · 30 servings
- See ingredients and serving details
Grow · Vanilla$65.55
Make your shake your ownYour shake.
Your shake.
Keep it simple.
Choose a flavor, check its ingredients, and keep your first shake simple. Start with the label so you know what goes into your shaker.
Compare ingredients
XWERKS Grow
In the media
Recognized for its whey isolate formula. Reviewed by fitness editors.
Men’s Journal
EDITOR’S PICK
Best Whey Protein Powder
Men’s Journal selected Grow as its best whey protein powder, highlighting the sourcing, formula, and smooth mixing.
Read full review
BarBend
PRODUCT REVIEW
Grass-fed whey, put to the test
BarBend tried Grow’s flavors and reviewed its grass-fed whey isolate formula.
Read full reviewMore clarity in every scoop.
A sensitive stomach does not have one universal trigger. Grow gives you a single protein source and flavor-specific ingredient lists so you can make an informed choice.
Whey isolate, without a concentrate blend
Grow uses whey protein isolate as its protein source. Isolate is filtered to reduce lactose, but it is still a milk product. Lower lactose does not mean a guaranteed symptom-free shake.
Know the sweetener
All four flavors use stevia. The current ingredient lists do not include sorbitol, maltitol, or xylitol. Check the entire flavor label, rather than choosing on one ingredient alone.
A useful serving of protein
Chocolate, Vanilla, and Strawberry provide 25g of protein. Peanut Butter provides 23g. Choose a serving that fits your food intake and a flavor whose ingredients work for you.
Milk allergy is different from lactose intolerance. Grow contains milk protein and is not suitable for a milk allergy. Peanut Butter also contains peanuts.
Keep the first shake simpleOne flavor.
One flavor.
Fewer moving parts.
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Read the flavor label first
Check the protein source, sweetener, gums, and allergens. Grow is not gum-free; the ingredient list below shows exactly what is in each flavor.
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Start with water
Mix according to your bag’s directions. Water adds no extra lactose or ingredients, which keeps your first shake easier to evaluate.
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Keep track of your own response
Note the flavor, serving, and anything you added. Avoid changing several ingredients at once. If discomfort persists, stop using it and discuss the symptoms with a clinician or dietitian.
Know what is in your scoop.
Every flavor uses whey isolate and stevia. Every flavor also contains xanthan gum. Compare the complete ingredient lists, especially if you already know an ingredient does not suit you.
| Flavor | Protein | Calories | Total carbs | Fat |
|---|---|---|---|---|
| Chocolate | 25g | 110 | 1g | 0.5g |
| Vanilla | 25g | 110 | 1g | 0.5g |
| Peanut Butter | 23g | 120 | 2g | 2g |
| Strawberry | 25g | 110 | 2g | 0.5g |
Per serving. 30 servings per bag. All flavors contain milk; Peanut Butter also contains peanuts. Check your bag for the current label.
Chocolate ingredients
Whey Protein Isolate, Cocoa Powder, Natural Flavors, Xanthan Gum, Stevia. Contains milk.
Vanilla ingredients
Whey Protein Isolate, Natural Vanilla Flavor, Xanthan Gum, Stevia. Contains milk.
Peanut Butter ingredients
Whey Protein Isolate, Peanut Butter Powder, Cocoa Powder, Natural Flavors, Xanthan Gum, Stevia. Contains milk. Contains peanuts.
Strawberry ingredients
Whey Protein Isolate, Natural and Artificial Flavors, Citric Acid, Xanthan Gum, Stevia, Beet Juice (color). Contains milk.
Check the fit before you choose a flavor.
| What you are looking for | What to know about Grow |
|---|---|
| A whey isolate protein source | All four flavors use whey protein isolate, with no whey concentrate in the ingredient list. |
| A powder without sugar alcohols | All four flavors use stevia; the listed formulas contain no sorbitol, maltitol, or xylitol. |
| A gum-free formula | Grow is not gum-free. All four flavors list xanthan gum. |
| A formula without artificial flavors | Chocolate, Vanilla, and Peanut Butter do not list artificial flavors. Strawberry lists natural and artificial flavors. |
| A product for a milk allergy | Choose an appropriate non-dairy alternative. All Grow flavors contain milk. |
| Guaranteed lactose-free or low-FODMAP suitability | Do not assume that whey isolate guarantees either. Follow your individual dietary requirements and confirm suitability before using Grow. |
Whey protein and sensitive stomachs: FAQs
Is whey isolate a good option for a sensitive stomach?
It can be an option when lactose is a concern because isolate is filtered to reduce lactose. It is not the answer for every digestive issue. Consider the full ingredient list, serving, and what you mix with it. A milk allergy means whey isolate is not suitable.
Will Grow prevent bloating?
No protein powder can promise that every person will tolerate it. Grow’s whey isolate formula and clear ingredient lists help you assess fit, but they do not guarantee freedom from bloating or other symptoms.
Is Grow lactose-free?
Grow uses whey isolate, which is filtered to reduce lactose. An exact measured lactose amount is not listed here, and the nutrition panel’s total sugar value does not establish zero lactose. All flavors contain milk. If you need a confirmed lactose-free product, verify that requirement before choosing it.
Does Grow contain gums or artificial sweeteners?
Every flavor lists xanthan gum and stevia. Grow is not gum-free. The current ingredient lists do not include sucralose, acesulfame potassium, or sugar alcohols. Strawberry lists natural and artificial flavors; flavoring and sweetening are different parts of the formula.
Which Grow flavor should I choose?
Choose by the ingredients you tolerate and the taste you prefer. Vanilla has four listed ingredients: whey protein isolate, natural vanilla flavor, xanthan gum, and stevia. That shorter list does not prove it will be better tolerated. Peanut Butter contains peanuts, and Strawberry has a different flavoring and acid profile.
Should I mix it with milk or water?
Water keeps the shake simple and adds no extra lactose. If you prefer another liquid, check its ingredients and use one you already tolerate. Regular milk adds lactose; a non-dairy mixer does not make the whey powder itself dairy-free.
Can I use Grow with IBS or a low-FODMAP diet?
Do not treat this page as a low-FODMAP certification or an IBS treatment recommendation. Requirements vary with the product, portion, and individual eating plan. Review the specific flavor with the clinician or dietitian helping you manage your diet.
Find the right protein routine for you.
Read the sensitive-stomach protein guideWhey isolate and lactose intoleranceRead Grow customer reviews
For general dietary guidance, see NIDDK’s advice on lactose intolerance. People tolerate different amounts of lactose; this guidance does not establish a tolerance threshold for Grow. Product details checked November 6, 2026. Follow the label on your bag.
Ready for your next serving?
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