What Is an Animal-Based Diet and Is It Right for You?

I’ve spent years working closely with grass-fed cattle farming in New Zealand and the UK — visiting farms, understanding how animals are raised, talking to the people who rear them. And somewhere along the way, what started as professional curiosity became something personal.

About three years ago, I started eating the way the farmers I respected had always eaten. More meat. More organs. Less of the stuff that came in packets. What I found surprised me — not because it was radical, but because it was so obviously right in hindsight. This is how I understood what an animal-based diet actually is, and why I think it’s worth your consideration.

What It Actually Means

An animal-based diet is a way of eating that centres foods derived from animals — muscle meats, organ meats, eggs, dairy, and seafood — whilst minimising or eliminating processed plant foods. The key word is “centres.” It’s not a strict rulebook; it’s a framework.

Most people eating this way include:

• Beef, lamb, and pork — grass-fed where possible; the fat matters as much as the protein
• Organ meats — liver, kidney, heart, the parts that were always the prize cuts before we forgot about them
• Fish and seafood — especially fatty, cold-water fish
• Eggs — probably the most underrated food in existence
• Dairy — raw or full-fat where you can get it; some people do better without it

The flexibility is real. I eat some vegetables. I eat honey. There are people I know in this space who eat nothing but ruminant meat, and others who include seasonal fruit. The common ground is that animal foods are the foundation — not the accompaniment.

How It Differs from Carnivore

I get asked this constantly. The short answer: carnivore is a stricter version.

Carnivore means animal products only, full stop. No honey, no herbs, no exceptions. An animal-based diet is the broader category — it allows for plant foods, but they’re not the point. If you’re eating carnivore, you’re eating animal-based, but plenty of people eat animal-based without being carnivore.

I’m not carnivore. I don’t think most people need to be. But I do think the principle — that animal foods should form the bulk of what you eat — is sound.

Why I Think It Works

When I started spending time on regenerative farms in New Zealand, I noticed something about the farmers and their families. They weren’t following any dietary philosophy. They just ate what was available — and what was available was meat, offal, eggs, and dairy from animals they raised themselves. They didn’t think about it. They were just well-fed.

Compare that to the people I’d grown up around in the UK, eating the standard modern diet, who seemed perpetually tired, perpetually unwell, perpetually looking for the next supplement to fix something that food should have fixed.

The difference isn’t complicated once you understand it.

Animal foods are the most nutrient-dense things on earth. Beef liver contains more usable vitamin B12 than anything else you can eat. More copper. More retinol. More choline. And the nutrients are in forms your body actually recognises — not the synthetic versions you find in supplements, not the poorly-converted precursors you find in plants.

The simplicity is a feature, not a bug. Building meals around a protein source, some fat, and maybe some eggs isn’t deprivation — it’s clarity. I stopped counting calories when I started eating this way, because I simply stopped needing to.

The metabolic effects are real. I lost fat I hadn’t been able to lose. My energy evened out. The afternoon crashes that I’d accepted as normal stopped happening. I’m not special — this is a common experience for people who make this shift, and there’s decent mechanistic science behind why.

What the Research Says (Honestly)

I want to be straight with you here, because I think overselling this approach does nobody any favours.

The research on specifically “animal-based” diets is thin in terms of large, long-term randomised trials. What we have is short-term data showing improvements in weight, triglycerides, and blood glucose; a lot of mechanistic evidence that the nutrients in animal foods are bioavailable and necessary; and population observations from cultures that ate this way and were metabolically healthy.

What we don’t have is the kind of decades-long trial evidence we have for Mediterranean-style eating. That gap in evidence cuts both ways — it doesn’t prove it’s the best approach for everyone, but it equally doesn’t show harm.

My honest take: the absence of long-term trial data on this specific dietary pattern matters less than most people think, because the nutrients themselves are exceptionally well-studied. We know what B12 does. We know what retinol does. We know what haem iron does. We know these nutrients are abundant in animal foods and poorly available elsewhere. That’s not speculation — that’s biochemistry.

What to Watch Out For

Working in this sector, I try to be honest about the things that make this approach difficult for some people.

Cost is real. High-quality grass-fed meat and organs cost more than the cheap alternative. If budget is a significant constraint, the practical path is to prioritise the highest-value items — liver is still cheap at most butchers, and eggs are incredibly affordable for their nutrient density. Organ supplements are another option worth considering.

Social eating gets complicated. Eating differently from everyone else at the table is a genuine friction point. I’ve navigated it by not making it someone else’s problem — I don’t explain my diet unless asked, and I’m flexible enough in most situations that it rarely causes issues.

Not everyone responds the same way. I’ve spoken to people who felt immediately better eating more animal foods. I’ve also spoken to people who took months to adjust, or who found that some animal foods worked better for them than others. Individual variation is real. Pay attention to your own data.

Where to Start

If you’re curious but not ready to overhaul everything, this is the order I’d approach it in:

1. Add organ meats first. Even once a week. Liver especially — it’s cheap, it’s extraordinarily nutrient-dense, and it rapidly fills gaps that most people are unknowingly carrying. If you can’t stomach fresh liver, a quality organ complex supplement achieves the same result.
2. Prioritise quality protein at every meal. Not a protein shake — actual animal protein. See how your hunger and energy shift over two weeks.
3. Drop the obvious ultra-processed stuff. Just removing seed oils, refined carbohydrates, and packaged snacks while increasing animal protein does most of the heavy lifting.
4. Track how you feel, not what the internet says you should feel. Your energy, your sleep, your skin, your digestion — these are better data than any study.

The Bottom Line

I didn’t come to an animal-based diet through ideology. I came to it through spending time with people who raised these animals, eating the way they ate, and finding that it worked better than anything I’d tried before.

It’s not a magic solution and it’s not for everyone. But if you’re eating the standard modern diet and feeling like something’s not quite right — not broken, but not thriving — this framework is worth exploring seriously. The nutrients are real. The simplicity is real. And the food, when it comes from good animals raised well, is genuinely something to be proud of eating.

Interested in incorporating the full nutrient profile of grass-fed organs without sourcing fresh offal? Our Beef Organ Complex gives you liver, kidney, heart, spleen, and pancreas from 100% grass-fed British and Irish cattle — freeze-dried to preserve the natural nutrient profile.