No Antibiotics. No Hormones. No mRNA Vaccines. Here's What That Actually Means.

Walk down the meat aisle and you'll see the same three claims stamped across beef, pork, and chicken alike: no antibiotics, no hormones, no mRNA vaccines. They read like one unified promise. They're not. Depending on the species, one of those claims is a meaningful choice a producer made and another is simply the law. REP Provisions publishes all three the same way across beef, pork, and chicken, but it's worth knowing which claim is actually doing work.

Quick answer: Hormone-free is a real, voluntary choice only in beef, it's already illegal in pork and poultry. No-antibiotics-ever is a genuine differentiator across all three species, since antibiotics are legal and commonly used in conventional cattle, hog, and poultry operations. mRNA vaccines aren't yet approved for any cattle in the U.S., but a related vaccine technology is already licensed for commercial swine, which makes REP's no-mRNA commitment most meaningful on the pork side.

Hormones: A Real Choice in Beef, Already Illegal Everywhere Else

The FDA has approved steroid hormone implants for growth promotion in beef cattle and sheep since 1956, natural hormones like estrogen, progesterone, and testosterone, plus synthetic versions, delivered as a slow-release implant in the ear [1]. That approval has never been extended to pigs, poultry, dairy cows, or veal calves. No steroid hormone implant is legal in any of those animals, and hasn't been since the 1950s [1].

That means a "hormone-free" label on chicken or pork isn't describing a choice the producer made, it's describing the law every producer already follows. On beef, it's different. Hormone implants are legal and common, and REP Provisions chooses not to use them on its cattle, at any stage [3] — a no-hormones standard the company applies across its cattle, hogs, and chickens alike [6]. That's the one place on this list where "no hormones" is actually a decision.

Antibiotics: The One Claim That's Real Across Every Species

Unlike hormones, antibiotics are legal and widely used across cattle, hogs, and poultry alike. A USDA study of U.S. cattle feedlots found that 87.5% administered antimicrobials in feed, water, or by injection [2]. Recent FDA sales data shows antibiotic use has actually been climbing in both the beef and pork industries in recent years, even as poultry producers have cut back [4].

This is the claim where REP's standard does the most consistent work across every species it raises. REP's cattle receive no antibiotics and if an animal genuinely needs medical treatment, it's treated for its own welfare, then removed entirely from REP's food supply rather than sold under the REP label anyway [3].

mRNA Vaccines: Not Yet in Cattle, Already in Pork

This is the newest and most misunderstood claim on the list. As of now, no mRNA vaccine is approved for use in any cattle in the United States, that applies industry-wide, not just to REP's herds. But a related RNA-particle vaccine technology, marketed as Sequivity, has been commercially licensed for use in swine since 2018 [5].

So on beef, REP's no-mRNA commitment is currently a forward-looking guarantee rather than something that separates its cattle from anyone else's, no cattle in the country are getting mRNA vaccines yet. On pork, it's a live and meaningful choice, since the technology is already commercially available and REP has committed not to use it, a standard the company also asks its partner ranches to hold to [6].

Why REP Publishes the Distinction Instead of Blurring It

Most "clean label" marketing lumps all three claims together as one undifferentiated promise, whether or not the claim required the producer to actually do anything. REP's own beef product page spells out its no-antibiotics, no-hormones, no-mRNA standard explicitly rather than leaning on the vaguest, most flattering version of the story [3], and REP states the same standard applies across its cattle, hogs, and chickens [6]. If you've read our piece on finding glyphosate-free beef, this will sound familiar, the specific standard matters more than the marketing category it gets filed under.

Browse the Grass-Fed & Finished Beef Collection or the full product lineup to see the standard applied the same way across every cut REP sells.

Key Takeaways

• Hormone implants are FDA-approved only for beef cattle and sheep. They've never been legal in pork or poultry, so "hormone-free" chicken isn't a meaningful differentiator
• Antibiotics are legal and commonly used across cattle, hog, and poultry operations alike, making "no antibiotics" the one claim that's genuinely comparable across all three species
• No mRNA vaccine is currently approved for cattle in the U.S., but a related RNA-particle vaccine has been commercially licensed for swine since 2018
• REP Provisions applies a no-antibiotics, no-hormones, no-mRNA-vaccine standard across its cattle, hogs, and chickens, with sick animals treated for welfare and then removed from REP's supply rather than sold under its label

Frequently Asked Questions

Is it legal to use growth hormones in chicken and pork in the US?

No. The FDA has never approved steroid hormone implants for growth purposes in pigs, poultry, dairy cows, or veal calves. Hormone implants have only ever been approved for beef cattle and sheep, a practice in place since the 1950s.

Are antibiotics commonly used in conventional beef, pork, and poultry production?

Yes, across all three. A USDA study found that 87.5% of U.S. cattle feedlots administered antimicrobials in feed, water, or by injection. Antibiotic use has also been rising in both the beef and pork industries in recent years.

Are mRNA vaccines used in cattle in the United States?

No mRNA vaccines are currently approved for use in any cattle in the United States. However, a related RNA-particle vaccine technology has been commercially licensed for use in swine since 2018.

What does REP Provisions guarantee about antibiotics, hormones, and mRNA vaccines?

REP Provisions raises cattle, hogs, and chickens without antibiotics, hormones, or mRNA vaccines. If an animal requires medically prescribed antibiotics for its health, it receives treatment but is removed from REP's food supply rather than being sold under the REP standard.

References

1. ↑ U.S. Food and Drug Administration, "Steroid Hormone Implants Used for Growth in Food-Producing Animals" — fda.gov
2. ↑ USDA APHIS, "Antimicrobial Use and Stewardship on U.S. Feedlots, 2017" — aphis.usda.gov
3. ↑ REP Provisions, 90/10 Grass-Fed Ground Beef product page — repprovisions.com/products/rep-regenerative-90-10-ground-beef
4. ↑ CIDRAP, "FDA report shows small decline in sales of antibiotics for food-producing animals" — cidrap.umn.edu
5. ↑ Tennessee Farm Bureau, "mRNA Vaccines in Livestock" — tnfarmbureau.org
6. ↑ REP Provisions, FAQs page — repprovisions.com/pages/faqs