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The Healf Source
Nature's Multivitamin? What Beef Liver Actually Delivers
Everything to know about the buzzy supplement, according to experts.
Written by: Ed Cooper
Written on: September 15, 2026
The concept of a beef liver supplement is simple: swallow a capsule and get the whole-food nutrition your ancestors pulled from nose-to-tail eating, without any of the taste, texture, or effort. More recently, that philosophy has turned beef liver into one of the fastest-growing categories in wellness, sold as a shortcut to a multivitamin and marketed as much on ancestral instinct as on science.
The nutrient density is real — liver is one of the most concentrated whole foods there is, and that isn't just a marketing tactic. But it's worth asking how much of those nutrients survive the journey from organ to capsule, whether "multivitamin" is the right word for something whose contents vary batch to batch, and whether a food our ancestors ate occasionally makes sense as a daily habit. We asked nutritionist Jenna Hope, RNutr, MSc, BSc, to separate what the science supports from what the marketing promises.
What nutrients are actually in beef liver?
There's no question that beef liver, in its original form, is nutritionally stacked. “Beef liver is a good source of a wide range of nutrients including vitamin A, B12, B2, B9, choline, copper and iron,” says Hope, “and contains some smaller amounts of nutrients such as zinc, selenium, B6 and B5 too.” In peer-reviewed food analysis, raw beef liver has come in at around 20,800 μg of retinol per 100g, which puts it among the most concentrated food sources of vitamin A.
Therein lies the catch — this figure varies depending on the animal, with several variables, from lifestyle to diet, affecting the outcome. “Exact concentrations can vary due to the cow's diet, age, breed and general health and wellbeing,” Hope explains. Worth remembering next time a supplement label promises a precise percentage of your daily needs.
Is beef liver really nature's multivitamin?
Short answer? No. While it may be a nice bit of branding, Hope isn't convinced the concept of beef liver holding muster against a multivitamin. “Beef liver does contain a wide range of nutrients; however, if you're taking it as a supplement, it should be approached with caution,” she says.
Part of the issue is the form vitamin A takes. Liver stores it as retinol, the preformed version the body can use immediately rather than having to convert it first, which is exactly what makes it so potent and, crucially, so easy to overdo.
“It’s difficult to call it ‘nature's multivitamin’ as the concentrations of each nutrient in the supplements can vary,” Hope explains. “As a result, it can be challenging to know if there's too much of a certain nutrient, which can cause a toxicity risk.”
Beef liver capsules vs eating fresh liver: what's the difference?
A beef liver capsule isn't just a nutrition hit in a more convenient shape. “Beef liver in capsule form is more concentrated, and therefore it can be challenging to know exactly what you're consuming,” Hope says. “You're also more likely to consume higher amounts of the concentrated nutrients but a smaller amount of liver overall when taken as a supplement versus when you're eating actual liver.”
Supplement brands typically freeze-dry the raw liver before grinding it into powder and encapsulating it, and these methods can change how well your body absorbs what's left. There's also considerably less protein in a capsule than in a plateful of the real thing, since what's being concentrated is mostly the vitamin and mineral content, rather than the muscle tissue itself.
Then there's the regulation gap. “Individual nutrient supplements are created around nutritional recommendations; however, beef liver supplements are not,” says Hope, “meaning there's less awareness and control around exactly which and how many nutrients are in the supplement.” As for the ancestral pitch, which gets plenty of traction on social media, the idea that this is simply what our ancestors ate doesn't quite stand up to scrutiny, either.
Fundamentally, liver is a natural food and one earlier humans would have eaten (with plenty of us still doing so). Yet, as Hope describes, “they wouldn't have had such easy access to be able to consume it on a daily basis", which is precisely the habit a daily capsule creates — for better or worse.
How much beef liver is too much? The vitamin A question
Hope explains that liver shouldn't be eaten more than once a week, because of the risk of vitamin A and copper toxicity. The EU's food safety authority sets the upper safe limit for preformed vitamin A at 3,000 μg a day for adults, and a single 100g serving of raw beef liver can sit above that entire allowance on its own. Layer a daily capsule on top of an already varied diet and it doesn't take long for the total to run high.
Who should avoid beef liver supplements?
While it can be easy to tick over this limit, two groups of people should give beef liver supplements a wide berth. “It's not advisable for these to be taken daily,” Hope says, “however, pregnant women and those with liver disease definitely should not be taking beef liver supplements.” In particular, the pregnancy advice is backed by some fairly stark evidence. A study of more than 22,000 women found that daily intake above 10,000 IU of preformed vitamin A was linked to a significantly higher rate of birth defects affecting the head, heart, brain or spinal cord, which is why the NHS advises against liver and liver products throughout pregnancy altogether.
Takeaway
Beef liver is a truly nutrient-dense food, and for anyone who'd never willingly put liver on a plate, a supplement is a reasonable way to get nutrients they're otherwise missing. But remember that a beef liver capsule is a concentrated food whose contents shift with the animal it came from.
Used occasionally, chosen from a brand that declares its vitamin A content, and not stacked on top of a multivitamin or cod liver oil, it's a sensible and potent addition.
FAQs
Are beef liver supplements good for you?
Beef liver is genuinely nutrient-dense, containing vitamin A, B12, B2, B9, choline, copper and iron. But because supplements concentrate those nutrients unpredictably, they carry a toxicity risk that whole liver eaten occasionally does not.
How many beef liver capsules should you take a day?
There's no established safe daily dose. Because concentrations vary between products, and preformed vitamin A has an EU upper limit of 3,000 μg a day for adults, beef liver supplements aren't advisable as a daily habit.
Can you take beef liver supplements while pregnant?
No. The NHS advises against liver and liver products throughout pregnancy because of the risk high-dose preformed vitamin A poses to foetal development.
Do beef liver capsules count as a multivitamin?
Not reliably. Unlike multivitamins, which are formulated to nutritional recommendations, beef liver supplements aren't — so the nutrient amounts per capsule are far less predictable.
What are the side effects of beef liver supplements?
The main concern is cumulative vitamin A and copper toxicity from regular use. People with liver disease and anyone pregnant should avoid them entirely.
This article is for informational purposes only, even if and regardless of whether it features the advice of physicians and medical practitioners. This article is not, nor is it intended to be, a substitute for professional medical advice, diagnosis, or treatment and should never be relied upon for specific medical advice. The views expressed in this article are the views of the expert and do not necessarily represent the views of Healf
Ed is a freelance journalist and former Men’s Health digital editor, with bylines in Red Bull, BBC StoryWorks, Guardian Labs, Third Space, Natural Fitness Food and Form Nutrition, among others. Having run marathons, conducted sleep experiments on himself and worked with some of the world’s most in-demand experts — from sleep scientists and strength athletes to high-performance trainers and elite-level nutritionists — one thing remains clear for The Healf Source contributor: fitness trends come and go, but as long as you keep turning up for yourself, consistency will win every time.
