Spacemilk is the world's first yeast protein isolate made from non-GMO baker's yeast (Saccharomyces cerevisiae) through fermentation. It provides 20g of complete protein per serving with a perfect 1.0 PDCAAS (Protein Digestibility Corrected Amino Acid Score).

Spacemilk is derived from yeast fermentation rather than dairy or plants, making it naturally allergen-free, ultra-clean with heavy metals ten times below Prop 65 standards, and 100% pesticide-free.

Yes. Spacemilk is 100% vegan. It's made from baker's yeast, a single celled member of the fungi kingdom, not an animal or plant product, making it suitable for vegans and naturally more ethical than traditional proteins.

Yes. Spacemilk has a perfect 1.0 PDCAAS score and contains all nine essential amino acids, nutritionally equivalent to whey and egg proteins.

Spacemilk contains over 21% BCAAs, comparable to whey protein. It actually exceeds whey in several amino acids including arginine, glycine, alanine, and phenylalanine, while matching or closely matching others.

Protein is the building material your body uses daily to repair and strengthen itself. When you don’t get enough, your body “borrows” from your muscles—if you don’t replace that within about 48 hours, it becomes loss, and your muscles atrophy. Getting enough protein keeps your muscles, energy, and health on track.

Beyond muscle repair, protein supports hormones, immune function, and cellular recovery. Unlike fat or carbs, your body doesn’t store protein—it’s either in your diet or in your muscles. As we age, protein digestion becomes less efficient, so older adults actually need as much protein as athletes to maintain strength and prevent muscle loss.

The FDA’s Daily Reference Value is 50g of complete protein for a 2,000-calorie diet. However, modern research and many health professionals suggest that 0.8–1g of protein per pound of body weight per day may be optimal for maintaining or building muscle.

We fully adhere to FDA guidelines, but acknowledge that protein needs vary by age, activity, and metabolism. The most important thing is to consistently meet your body’s protein needs—starting with the FDA DRV and adjusting to what helps you feel strongest.

No—protein is for every day. Getting enough helps your body adapt not just to workouts, but to daily life—carrying groceries, climbing stairs, recovering from stress. Without enough protein, your body draws from its own muscles, leaving you weaker over time. Consistent protein intake keeps you strong, mobile, and resilient.

For healthy individuals, there’s no known upper limit for safe protein intake. Studies have tested diets with up to 35% of total calories from protein without finding adverse effects.

The old belief that you can only absorb 25g per meal has been debunked—your body can absorb and use larger amounts as long as there’s a need, just over a longer time period.

Yes. Spacemilk is naturally free from all nine major allergens: dairy, soy, gluten, eggs, tree nuts, peanuts, fish, shellfish, and sesame. It's suitable for people with food allergies and sensitivities.

Yes. Spacemilk contains no active or inactive yeast, and almost no fermentable carbohydrates, making it suitable for those managing candida overgrowth.

If you have a true baker’s yeast allergy (IgE-mediated), do not use Spacemilk unless cleared by your allergist. While the yeast is destroyed during isolation, the protein is yeast-derived. This allergy is extremely rare.

For those sensitive to fermented foods, Spacemilk is safe—it contains no live or inactive yeast, no fermentation byproducts, and tested non-detectable for histamines.

Yes, especially our Unflavored version—it’s just the plain protein isolate. Our formula is free from all nine major allergens and tested for fermentation byproducts and histamines.

Flavored varieties contain monk fruit and thaumatin (natural fruit-derived sweeteners) and sunflower lecithin (hexane-free). Allergies to these are rare but possible; consult your healthcare provider if needed.

Spacemilk is exceptionally clean - it's 3rd party tested to be 100% pesticide-free across 77 pesticide types and has heavy metal levels up to 40x lower than typical plant proteins, meeting the strictest global safety standards.

Every batch is independently tested for microbial safety, heavy metals (arsenic, cadmium, mercury, lead), and 77 different pesticides. All results are verified to be below detection limits or well within safety standards.

Spacemilk has a neutral pH of ~7, making it gentle on the digestive system. Most users report no bloating, gas, or digestive discomfort compared to dairy or plant-based proteins.

Yes, Spacemilk is Low FODMAP certified, making it suitable for people with IBS or FODMAP sensitivities who typically struggle with other protein powders.

Unlike dairy proteins that can cause lactose intolerance issues or plant proteins that may contain hard to digest plant material and anti-nutrients, Spacemilk is pure protein isolate with no digestive irritants.

Each serving contains 20g of protein with only 100-120 calories depending on the flavor (unflavored has 100 calories, vanilla has 110, chocolate has 120).

Spacemilk can be consumed any time - pre-workout, post-workout, between meals, or as a meal supplement. As a slow-digesting protein, it provides sustained amino acid release for several hours.

Follow standard protein recommendations of 0.8-1g per pound of body weight from all sources. Most people use 1-2 servings of Spacemilk daily as part of their total protein intake. The founders use 3-4 per day, sometimes more.

Yes, a 2024 clinical study showed Spacemilk matches whey protein for building lean muscle mass and strength when combined with resistance training. See our Science tab for full studies.

Yes, as a slow-digesting protein, Spacemilk helps maintain satiety and fullness for hours, supporting healthy weight management goals.

Spacemilk uses organic monk fruit extract and thaumatin (a natural protein-based sweetener from the Katemfe fruit) with no artificial sweeteners, sugar alcohols, or added sugars.

Sunflower lecithin is used for smooth mixing and texture. While it comes from sunflower seeds, it’s not a “seed oil” in the conventional sense—it contains no omega-6 fats, isn’t inflammatory, and is actually a beneficial phospholipid that supports brain and cell health. We use only hexane-free, cold-processed lecithin for purity and safety.

Every ingredient in Spacemilk is intentional and carefully vetted for safety and quality. We use natural flavors for a clean, balanced taste—and pair them with acacia fiber instead of maltodextrin. Acacia is a prebiotic fiber that supports gut health, while maltodextrin can spike blood sugar and cause digestive stress.

We use only the cleanest soluble fibers for texture and digestive balance—acacia gum in our vanilla flavor and konjac gum in our chocolate. These are gentle prebiotic fibers that support gut health and are the only gums shown not to be inflammatory with long-term use, unlike common alternatives like xanthan or guar gum.

No. Spacemilk contains no artificial flavors, sweeteners, colors, or preservatives. All ingredients are natural or organic, including natural vanilla and chocolate flavors.

Yes. Our Unflavored Spacemilk is completely unsweetened—pure yeast protein isolate with nothing added. It’s perfect for blending into smoothies, coffee, baking, or savory recipes.

Our plain protein is not. Our flavored versions include a few grams of soluble fiber (acacia and konjac) per serving—a modest, functional amount that supports gut health without excess bulk.

Yes. All flavors are low in carbohydrates and contain no added sugar.

The unflavored version has an earthy, slightly savory taste. Vanilla shake has a classic vanilla shake flavor, while chocolate mousse is closer to a rich, cocoa type of chocolate.

Mix one serving ( ¼ cup) into 8–12 oz of water or your favorite beverage. For best texture, blend or use a frother. Enhance with frozen fruit for a smoothie-like texture.

Spacemilk mixes well with water, plant milk, dairy milk, or can be added to smoothies, coffee, oatmeal, baking recipes, and other foods. Easy simple smoothies are frozen strawberries, water, and vanilla shake, or frozen bananas for chocolate mousse.

Some foaming is normal and indicates proper protein dissolution. Let the shake sit for a minute if you prefer less foam.

Yes, Spacemilk can be mixed into hot coffee, tea, or other warm drinks. Add gradually while stirring to prevent clumping.

Store in a cool, dry place away from direct sunlight at room temperature. Always keep the container tightly sealed to prevent moisture and maintain freshness.

Two years from manufacture date.

Spacemilk doesn’t include a plastic scooper because we’re committed to reducing single-use waste. Our sustainability mission focuses on minimizing unnecessary materials in both product and packaging. Most people already have a measuring cup or kitchen scale at home, so skipping the scooper helps us keep plastic out of landfills without impacting your experience. One serving is approximately ¼ cup, or about 30 grams.

Spacemilk has a 95% lower carbon footprint than beef protein and uses 74 liters of water per kg compared to 15,000 liters for beef or 2,100 for soy protein.

Made in the USA, just outside Orlando, Florida, with domestic and global ingredients.

Yeast is grown in fermentation tanks, fed molasses from sugar beets, then processed through autolysis, enzymatic breakdown, centrifugal separation, pasteurization, and spray drying to create an ultra clean protein isolate.

Yes, the process uses sugar beet molasses (a byproduct), recycles process water, converts wastewater to organic fertilizer, and operates on a 2-3 day production cycle with minimal resource requirements.

Spacemilk is the first yeast protein isolate requiring specialized fermentation and processing technology, extensive third-party testing, and premium clean ingredients, justifying the premium price for superior quality.

Yes, we offer a subscribe and save option at checkout.

Try any Spacemilk product for 30 days. If you don’t love it, simply return the product and we’ll exchange it for any flavor of your choice or give you store credit—up to you.

Not yet—but our 30-day satisfaction guarantee makes it risk-free to try. If you don’t love it, we’ll exchange it for another flavor or provide store credit. (See our Return Policy for details.)

Multiple 2024 studies show yeast protein matches whey for muscle building, supports healthy aging, improves calcium absorption, and provides excellent digestibility and amino acid bioavailability. See our Science tab for full study.

A 2024 double-blind randomized controlled trial demonstrated that yeast protein matches whey protein for building lean muscle mass and strength in adults undergoing resistance training.  See our Science tab for full study.

Yes, baker's yeast and yeast protein have GRAS (Generally Recognized as Safe) status and have been safely consumed for thousands of years in bread, beverages, and foods around the world from every culture.

We stand behind every scoop of Spacemilk. If you’re not completely satisfied with your purchase, our return policy is designed to make the process simple and straightforward.

Only purchases made directly on www.spacemilk.com are covered by this policy. (Orders placed through Amazon or any third-party retailer are not eligible.)

• We’ll send a replacement product to you free of charge once your return is processed.
  
• Return shipping costs are the responsibility of the customer.
  
• If you choose store credit, you’ll receive 100% of the product price you paid, excluding shipping and sales tax (if applicable). Store credit is valid for 1 year from the date of issue and can be used toward any product on www.spacemilk.com.
  
• All return requests must be initiated within 30 days of receiving your order.
  
• Products must be less than 50% consumed to qualify for return.
  
• Returns are limited to a maximum of two containers total across two different flavors.
  
• All items must be returned by mail to the return address provided by our team once your request is submitted.
  
• Multiple or repeated return requests may be subject to additional review prior to approval.
  

Please Note: As part of our quality assurance standards, all returned nutrition products — even if unopened — are safely and responsibly disposed of and cannot be resold.

How to Initiate a Return

1. Contact us here and let us know whether you’d like a replacement or store credit.
   
2. We’ll email you the return address.
   
3. Ship your product back to us and email us the tracking number once sent.
   
4. Once we receive your return, we’ll process your replacement or store credit within 24 hours.