Lab-grown eggs are already in US grocery stores - here's who makes them and how to spot one

There is a real egg-white protein on American shelves right now that never came out of a chicken. It was brewed in a steel tank by a genetically engineered yeast, it is legal to sell in all fifty states, and the FDA never approved it.

Every part of that sentence is defensible, and most of what is circulating online about it is not. So here is the whole thing, from the primary documents: who makes it, when it arrived, what it is actually made of, what the FDA did and did not do, and the exact words to look for on an ingredient list.

The short version

• The ingredient is recombinant ovalbumin — the main protein in egg white — grown by yeast or fungus instead of a hen. The industry calls it precision fermentation.
• Two companies are cleared to sell it in the US: The EVERY Company (product: OvoPro) and Onego Bio (product: Bioalbumen).
• It is not FDA-approved. Both companies declared their own ingredient safe under GRAS, notified the FDA, and the FDA wrote back that it had "no questions."
• It is already inside products at Walmart, Target and Amazon, plus regional bakeries. The brands are contractually confidential.
• It is an egg allergen, and it is certified vegan. Both of those are true at the same time.
• It does not have to be labeled "bioengineered," and in most cases it will not be.

Now the long version.

"Lab-grown eggs" is three different things, and only one of them is real

Most of the confusion online comes from collapsing three unrelated technologies into one phrase. They are not the same, and being sloppy about it is how people end up scared of the wrong thing.

Snopes ran a fact-check on the viral version of this story and rated it a mixture — the product is real and it is on shelves, but calling it "lab-grown" in the cell-cultured sense is wrong, and Snopes found no evidence that brands were hiding it off their ingredient lists.

We think the fair reading is this: the technology is not what the scary version of the rumor says it is, and it is also far further along, in far more products, than most shoppers realize. Both.

How it is actually made

This part is not a mystery. It is described in detail in EVERY's own filing to the FDA, GRAS Notice 1104, and in the agency's response letter. Here is the process, in the FDA's language.

1. Print the gene. A gene sequence encoding Gal d 2 — chicken ovalbumin — is synthesized from scratch. The FDA letter describes it as "a de novo synthesized gene sequence that encodes Gal d 2 that is identical to the gene sequence from chicken egg (Gallus gallus)." No chicken is involved at any point; the sequence is written from the published genome.
2. Insert it into a yeast. The gene is integrated into the chromosome of Komagataella phaffii — a yeast most microbiologists still call by its old name, Pichia pastoris. The specific engineered strain is ATCC GSD-1235, deposited at the American Type Culture Collection in Manassas, Virginia.
3. Feed it and let it run. The yeast is grown in a controlled fermentation. It copies itself, and every copy carries the inserted gene. The FDA notes the insert was confirmed stable "after 45 generations of growth on non-selective growth media."
4. Throw the yeast away. Cells are separated by centrifugation and microfiltration. What is left — the lysate — goes through ultrafiltration, chromatography and pH adjustment.
5. Dry it into powder. The finished ingredient is a white to off-white powder that is more than 75% protein, under 0.4% fat, and shelf-stable for two years with no refrigeration.

Onego Bio's version does the same thing with a different organism: the filamentous fungus Trichoderma reesei, the workhorse behind a lot of industrial enzymes.

The four amino acids nobody mentions

Here is the detail that gets left out of every press release, and it is sitting in the FDA's own letter.

The marketing word for these proteins is "bio-identical." The FDA's description is more careful:

"Clara states that egg-white protein is equivalent to Gal d 2, a major protein component of chicken egg white, with an N-terminal extension of four amino acids (EAEA)."

So it is not molecularly identical to hen ovalbumin. It is hen ovalbumin with four extra amino acids stapled to one end — a leftover from the secretion signal the yeast uses to push the protein out of the cell. EVERY's safety argument is that this makes no meaningful difference, and the FDA did not dispute it. But "equivalent with a four-residue extension" and "identical" are not the same sentence, and only one of them ends up on a slide deck.

The FDA never approved this. Here is what actually happened.

This is the single most-repeated error about this story, including by people trying to warn you about it. There is no FDA approval, because for food ingredients there usually is no such thing.

Under the GRAS pathway, a company can conclude on its own that its ingredient is safe, then voluntarily tell the FDA it did so. The FDA reviews the reasoning and, if it is satisfied, sends a letter saying it has no further questions. That is not approval. The agency says so itself, in the closing paragraph of EVERY's letter:

"Based on the information that Clara provided, as well as other information available to FDA, we have no questions at this time regarding Clara's conclusion that egg-white protein is GRAS under its intended conditions of use. This letter is not an affirmation that egg-white protein is GRAS under 21 CFR 170.35. Unless noted above, our review did not address other provisions of the FD&C Act."

The paper trail, precisely:

Worth being straight about the other side of this: the GRAS pathway is how nearly every ingredient in your pantry got there, and the EVERY notice is unusually thorough — it went through three rounds of FDA-requested amendments over thirteen months before it closed. This is not a case of something sneaking through. It is a case of the word "approved" doing work it was never entitled to do.

What it was cleared for, including the one nobody expects

The uses listed in GRN 1104 are broader than most people assume. Verbatim from the FDA letter, egg-white protein from K. phaffii is cleared as a substitute for hen egg white and whole eggs in:

baked goods and baking mixes; gluten-free bread; plant-based meat alternatives; egg noodles; ready-to-eat cereals; scrambled eggs, egg patties, quiche and soufflés; pancakes and waffles; protein and snack bars; salad dressings; eggnog; egg-white cocktails and powdered shake mixes — and as a fining agent in wine and juice.

That last one is the one that surprises people. In fining, the protein is added to clarify the liquid and then precipitates out, so the FDA notes it "will be removed from the final beverage product during the manufacturing process." It is not meant to be in the wine you drink. It is meant to have passed through it.

Two things it was explicitly not cleared for: infant formula, and anything under USDA jurisdiction.

The FDA also estimated how much of it Americans would eat if it fully replaced conventional egg protein in those categories: 8.6 grams per person per day at the mean, 16.3 grams at the 90th percentile. Not a trace ingredient. A staple-scale one.

It is vegan-certified and it is still an egg allergen

If you take one practical fact out of this article, make it this one.

The protein is ovalbumin. Your immune system does not care which organism assembled it. The FDA letter is blunt: egg-white protein from K. phaffii "requires labeling under the FD&C Act because it contains protein derived from egg," and EVERY itself states the protein "will likely elicit an allergic response in egg-allergic consumers."

EVERY says the same thing on its own FAQ: OvoPro "is not suitable for those with egg allergies." It is simultaneously certified vegan by The Vegan Society, and kosher and halal certified.

An egg-allergic vegan shopper is exactly the person most likely to reach for a product labeled "animal-free egg white protein" — and exactly the person it can send to the hospital.

The allergen statement is the safety net here, and it works: any product containing it has to say Contains: Egg. Which means for allergy purposes you are covered, and for "I just don't want this" purposes you are mostly not.

Who is selling it, and since when

Here is the timeline, which is the part the viral posts always skip.

And the number that explains why this is suddenly everywhere:

In the first four months of 2026, annual orders for OvoPro came to 550% of the company's entire 2025 volume.

The brands are confidential, and that is not a conspiracy

The most common question is the one nobody can fully answer: which products?

EVERY confirms OvoPro is an ingredient in products sold at Walmart, Target and Amazon, and in a growing number of regional bakeries. It will not name them. CEO Arturo Elizondo has been open about why — his customers are major global food companies and they treat supplier relationships as confidential, which is ordinary practice across the entire ingredients industry. Your ketchup brand does not name its tomato paste supplier either.

There is exactly one product you can point at with certainty: the Healthier Comforts Animal-Free Egg White Protein Powder, which is 100% OvoPro and says so on the front.

For everything else, the label is your only tool. So use it properly.

How to spot it on an ingredient list

EVERY publishes the exact wording it recommends its customers use. There are three:

• egg white protein (from fermentation)
• egg white protein (from yeast)
• animal-free egg white protein

Onego Bio's ingredient will show up in the same family of phrasings around non-animal ovalbumin or Bioalbumen.

Two traps worth knowing about:

The common-name trap. The FDA went out of its way in the response letter to say that its own use of the term "egg-white protein" is "not our recommendation of that term as an appropriate common or usual name" — and that it did not consult its own labeling office on the question. Translation: the agency reviewed the safety and pointedly declined to rule on what the label should say. The manufacturer picks. And an ingredient list that just says egg white protein, with no qualifier, is legal.

The bioengineered trap. You will probably never see a "bioengineered" disclosure on this. Under the USDA's National Bioengineered Food Disclosure Standard, disclosure is triggered by detectable modified genetic material in the finished food. The yeast is filtered out and the protein is purified. The gene is not in the powder. No disclosure required. That is not a loophole anyone exploited — it is the rule working exactly as written — but it does mean the front of the box will never tell you.

Why this is happening now

Two forces, and neither one is about your health.

Egg supply collapsed. The avian influenza outbreak that started in 2022 has killed more than 145 million birds in the US, including roughly 17.2 million laying hens in November and December of 2024 alone. Retail egg prices hit records in 2025. A protein that ships shelf-stable for two years, does not catch bird flu, and does not have a bad year is an obvious hedge for anyone whose margins live on egg prices.

The incumbents are funding it. This is the same pattern we traced in who is funding lab-grown meat. Among the investors in EVERY's Series D: Minerva Foods, one of the largest beef exporters in South America. ADM — the second-largest agricultural processor in the world — is now manufacturing it in Iowa. The companies that sell you the animal version are underwriting the replacement, because the replacement has a better cost structure.

Meanwhile the law has not caught up. Seven states plus a South Dakota moratorium have banned cell-cultured meat; Texas's SB 261 blocks cell-cultured protein sales until September 1, 2027. Not one of those laws touches precision fermentation. The banned thing is the one nobody is selling. The thing selling at 550% growth is banned nowhere.

What we would actually tell you

This is not "stop eating eggs." Real eggs are one of the better things in a grocery store, and nothing here changes that.

It is also not "this ingredient will hurt you." The protein is ovalbumin, it went through a genuinely rigorous GRAS review, and the honest scientific position is that there is no specific red flag in the file — just the ordinary caveat that applies to any novel-process ingredient with a short commercial history and no long-term human outcome data, because none exists yet for anything this new.

What it is: a case study in how far a food can travel before you are told about it. The gap between October 2023 and the day you heard about this is nearly three years, and it closed only because a supplier's order book grew fast enough to make the trade press. That gap is the actual problem, and it is not unique to eggs — it is how the ingredients in a fast-food egg patty got there too.

You do not have to have an opinion on precision fermentation. You are just entitled to know when you are eating it.

Where Tallow fits

The problem is never the one scary ingredient you already know the name of. It is the twelve you have never heard of, in six-point type, under a front label that says "simple."

That is what we built Tallow for. Scan a barcode and you get a 0–100 score you can actually audit — every ingredient named and rated in plain English, seed oils flagged, processing level scored, and lab results attached where they exist. If a product is built on a fermentation-derived protein, you find that out in about two seconds instead of by reading a GRAS notice from 2022.

Eat clean. Make the label prove it.

This article is consumer information, not medical advice. Product availability and corporate relationships change; every figure above is linked to its primary source as of August 2026. Primary sources: FDA GRAS Notice 1104, FDA agency response letter, GRN 1104, FDA GRAS Notice Inventory — GRN 1104, Onego Bio — FDA "no questions" letter on Bioalbumen, EVERY FAQ, USDA AMS — Bioengineered Food Disclosure FAQ, FoodNavigator — OvoPro demand surges 550%, ADM — commercial-scale OvoPro production in Clinton, Iowa, Business Wire — EVERY $55M Series D, AgFunderNews — EVERY Series D and customer confidentiality, Business Wire — Healthier Comforts consumer launch, Business Wire — world's first egg white made without a chicken, PR Newswire — Eleven Madison Park liquid egg, FoodNavigator-USA — Grupo Nutresa, Business Wire — Onego Bio's Jefferson County, Wisconsin plant, AgFunderNews — Onego Bio v. EVERY patent suit, CBS News — bird flu and egg prices, and Snopes — rumors about "lab-grown" eggs.