5 reasons people with sensitive stomachs are switching to Spacemilk
If protein powder has always left you feeling heavy, here’s why this one is different.
1. It’s light on your stomach
Spacemilk is a light, gut-loving protein, perfect for sensitive stomachs. If whey or pea protein has never sat right, this is perfect for you.
“I have tried so many products and Spacemilk is the only one that doesn’t upset my stomach and make me feel bloated.”
2. NO dairy, lactose, or gluten
Free from all 9 major allergens. Complete protein, equal to whey, but without the dairy or lactose.
Start with Vanilla
20g protein, milkshake flavor, with none of the dairy or sugar. New customers get 30% off plus a free bag of creatine.
Claim offer →
3. Protein powder shouldn’t leave you feeling bloated
Feeling cramped and heavy after a shake? Your stomach deserves better. Spacemilk was made for sensitive stomachs, with thoughtfully sourced ingredients and none of the junk.
- No dairy
- No lactose
- No gluten
- No soy
- No gums
- No fillers
4. A NEW KIND OF PROTEIN
Not animal or plant-based. Spacemilk is the first protein made from yeast. Isolated from nature's ancient ingredient, a pure protein delivered in delicious form.
5. WHAT THE PEOPLE ARE SAYING:
“Over the years I’ve used countless types and brands of protein powder, whey isolate, plant based, vegan and all have caused digestive issues… No digestive issues, tastes great, mixes well. I’m sold!”
the protein you've been searching for
Pick your flavor and get 30% off your first order, plus a free bag of creatine. Covered by a 30-day promise.
ChocolateSmooth cocoa0
VanillaClassic milkshake0
Unflavored Unflavored only comes in 30-serving bags.One ingredient0
OriginalMild, lightly sweet0
Pumpkin SpiceWarm fall flavor0
- Save 9% or more on every order
- Free shipping, always
- Skip, pause, or cancel anytime
- Earn up to 12% back in store credit
3rd orderCreatine$19.99FREE
6th orderSpacemilk Hat$24.99FREE
9th orderBag of protein$29.99FREE
Creatine
$19.99Today-
Creatine
$19.993rd order 
Spacemilk Hat
$24.996th order-
Bag of protein
$29.999th order
Renews every 30 days. Skip or cancel anytime.
The Spacemilk difference
Spacemilk vs everything else
| Spacemilk | WHEY | PLANT | |
|---|---|---|---|
| Complete protein (PDCAAS 1.0) | Yes | Yes | No |
| Dairy-free | Yes | No | Yes |
| Free from all 9 major allergens | Yes | No | No |
| No added farmland | Yes | No | No |
every batch tested and published
Every batch goes to Advanced Laboratories, an independent FDA-registered lab, for heavy metals, allergens, microbials and pesticides. Spacemilk publishes the measured numbers in full.
| Lead | 0.018 ppm |
|---|---|
| Mercury | 0.001 ppm |
| Gluten | <5.0 ppm |
| Dairy | <2.5 ppm |
| Staph aureus | <10 CFU/g |
Tested Aug 19, 2026. A “<” means not detected down to the lab’s lowest measurable level.
+85%
In a randomized, double-blind, placebo-controlled trial in adults over 40, yeast protein built 85% more lean muscle than placebo after 8 weeks of resistance training.*
*Study of yeast protein, the protein in Spacemilk.
Real reviews, happy stomachs
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Gentle on me
Protein powders are super hard on me, but this stuff is really gentle. It blends easily, my family and I all like the taste, AND I don’t have to worry about heavy metals like with other protein powders.
Vanessa M.Verified buyer
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Love it
I love the taste of all the flavors of space milk so far. I have tried chocolate, vanilla and pumpkin spice.
Karen C.Verified buyer
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Delish
I love this protein. It always tastes delicious and has a nice texture and it feels good in my body.
Kirstin C.Verified buyer
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I really love the product, it is so gentle on my stomach while giving the necessary protein boost to my smoothie.
Cassandra U.Verified buyer
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I have tried so many products and Spacemilk is the only one that doesn’t upset my stomach and make me feel bloated.
Dee R.Verified buyer
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I really enjoy the taste of vanilla Spacemilk. Easy to mix and no bloating after I drink my protein shake.
Nathan W.Verified buyer