Do You Need Vitamin C On Carnivore?

The most persistent objection to eating only animals has been answered in ships’ logs for two centuries. Nobody read them.

Type the vitamin C content of beef into a search bar and the answer comes back as a single character.

Zero.

Not low. Not trace. Not "nobody checked". Zero, printed with the confidence of a settled matter, and it does more damage to this way of eating than every cardiologist in the country combined.

Part of that is the disease itself. Scurvy is the only nutritional deficiency with a costume. Everyone can picture it: the loose teeth, the black gums, the pirate. Nobody has ever pictured a magnesium deficiency. So the question arrives before the first ribeye has come out of the bag, usually from someone who has not asked a nutritional question in thirty years.

The answer is more interesting than either side tends to admit.

Where The Zero Comes From

Food composition databases are not encyclopaedias. They are ledgers of what somebody, at some point, could be bothered to measure.

Ascorbic acid in steak is not an interesting measurement to a food scientist, because everyone already knows the answer. So the assay never gets run, the field never gets filled, and an empty field prints as a zero. The zero is not a finding. It is a shrug that got formatted.

When someone does run the assay, the number moves. Analysis of red meat puts ascorbate at roughly two and a half micrograms per gram, which works out at a couple of milligrams across two pounds of steak. I covered these numbers before and drew a more cautious conclusion from them than I would now.

Ascorbate exists in two forms, reduced and oxidised. Your body absorbs both and converts the oxidised form straight back into the useful one. Plenty of assays only chase the reduced form, which means any tissue carrying its vitamin C in the oxidised state reports lower than what your body is actually going to use.

Then there is the fragility. Vitamin C is the first thing to abandon a piece of meat. Heat drives it off. Oxygen degrades it. Salt, curing, drying and time finish the job. What the lab finds depends entirely on what happened to that meat between the animal and the bench, which is a detail nobody records and everybody ignores.

Hold on to that last point, because the entire history of scurvy turns on it.

Scurvy Was A Storage Problem

The great scurvy epidemics of the age of sail did not happen because sailors had no meat. They happened surrounded by meat.

Salt pork in casks. Beef that had spent months in brine below the waterline. Ship’s biscuit hard enough to shame a paving slab. The provisions were chosen for one quality only, which was the ability to survive a year at sea, and everything that made them survive a year at sea also stripped out the one compound the crew was dying for. The meat had been embalmed. So had the men, eventually.

Then citrus arrived and history handed out the medal. Lind, limes, problem solved, chapter closed.

Except the Royal Navy’s own records refuse to cooperate with that story.

A British Arctic expedition sailed north with lime juice as a compulsory daily ration, issued under supervision, swallowed in front of an officer. Scurvy tore through the sledging parties anyway. Men died. Parliament held an inquiry. The juice had been West Indian lime rather than lemon, boiled down in copper vats, decanted into open tanks and carried across an ocean, by which point whatever ascorbate it started with had long since departed.

The cure worked when it was fresh and failed when it was not, which is the only rule that has ever governed this disease.

The Ships That Ate Their Way Out

A Belgian expedition went south and got itself locked into the Antarctic ice for a winter nobody had provisioned for. The stores were tinned. Tinned meat, tinned fish balls, tins of things that had stopped resembling food somewhere in the shipping. The crew went down one after another. One man died. The captain wrote his will.

The ship’s doctor had wintered in the Arctic among people who ate no fruit whatsoever and did not get scurvy, and he drew the obvious conclusion. He ordered fresh seal and penguin, barely cooked, in some cases not cooked at all.

The commandant refused, on the grounds that the British Navy had been using lime juice successfully for half a century. He was the last man aboard to eat the meat and the last man aboard to recover. The captain, already writing his affairs up, was put on fresh meat and water and walked again. A young Norwegian on that crew ate his penguin raw, rebounded faster than anyone, and went on to collect both poles.

The pattern repeats everywhere you look for it. Arctic parties eating fresh polar bear stayed clean while their shipmates, turning their noses up at it and dutifully taking the lime ration, went down with the disease. Antarctic base camps kept scurvy away on fresh seal. One polar journey ran on dog meat killed along the route and finished healthy, while the party alongside it ran on manufactured rations and did not.

Same ocean. Same latitude. Same lime bottle. The variable was freshness.

And later, under the least sympathetic conditions available, two men ate nothing but meat and fat for a year inside a New York hospital, observed by a committee assembled largely in the expectation of watching them fall apart. No fruit. No vegetables. No supplement. No scurvy.

Why The Requirement Falls Through The Floor

History without a mechanism is just an anecdote with a good accent, so here is the machinery.

Vitamin C travels on the glucose transporters. The oxidised form of ascorbate enters cells through the same doors glucose uses, and glucose arrives in vastly greater numbers and queues first. Eat a high carbohydrate diet and you spend the day competing with your own breakfast for the vitamin you just consumed. Take the glucose away and the doors stand open. The same intake goes considerably further.

Then there is the workload. A large share of your vitamin C gets consumed mopping up oxidative damage, most of it generated by fructose and by the polyunsaturated fats in seed oils that oxidise in your tissues faster than you can neutralise them. Remove the arsonist and the fire brigade gets a quieter shift. What remains is handled comfortably by glutathione and uric acid, the two antioxidants the body appears to have promoted when our ancestors lost the ability to make ascorbate for themselves, and both of which a meat diet supplies in abundance.

Half of vitamin C’s remaining duties are already covered by the food. Its famous role in iron absorption only matters for the iron in plants, and heme iron from meat walks in unassisted. Its role in manufacturing carnitine matters if you are obliged to manufacture carnitine, which you are not when you are eating it by the kilogram.

The collagen job is the one that stays. That hydroxylation step needs ascorbate and always will, which is precisely why the disease looks like a body quietly unpicking its own stitching. Nobody is arguing that requirement down to nothing.

They are arguing about the size of it. And every published requirement you have ever seen was measured in people eating bread.

The Correction I Owe You

I have previously written that vitamin C requirements on this diet probably land in the micrograms rather than the milligrams. Having spent more time in the mechanism, I would now go considerably lower than that. Nanograms.

The figure everyone quotes, the ten milligrams that holds scurvy at bay, came out of controlled deprivation experiments on men eating ordinary wartime rations. Carbohydrate included. Nobody has ever run that experiment the other way round, because nobody designing it thought the question was worth asking.

The floor for a human eating no carbohydrate has never been measured. Every mechanism we can identify pushes it downwards, some of them by orders of magnitude. And the observational record now runs to people who have eaten this way for years and in some cases decades without producing a single case of the disease.

That is an inference rather than a number off a lab report, and I will happily call it one. But the burden has shifted. Anyone insisting the requirement is unmet is welcome to produce the carnivore with scurvy.

The queue has been forming for some time.

The Failure Mode Is Not The One You Expect

If there is caution to be taken here, it belongs somewhere other than quantity.

The sailors were not short of meat. Their meat was salted, casked and half a year old. So the practical instruction writes itself: eat it fresh and eat it fatty. Steak rare in the middle. Mince browned rather than stewed into grey submission. Eggs. Meat that spent eighteen months in a freezer and then forty minutes in a boiling pan is a ration cask with better branding.

The other caveat concerns dairy. Pour enough milk into the day and the lactose comes with it, the glucose queue reopens at the transporter, and you have handed back some of the advantage you were relying on. Cheese and butter carry almost none of it. Litres of milk do.

And No, You Do Not Need Liver

The reflex answer in this space is organ meat. Spleen tops the table at around forty five milligrams per hundred grams. Thymus follows at thirty four. Liver sits at twenty five, which is more than an orange.

All true. None of it obligatory.

Liver is currently being dosed at levels that outrun the animal it was removed from. A cow carries roughly one part liver to a hundred parts muscle. Eat a hundred grams of it daily and you would need to put away ten kilograms of beef alongside to keep your ancestors comfortable. Push past a couple of ounces and you are over the tolerable limit for vitamin A, while copper accumulates quietly in the background, depressing zinc and doing nothing helpful to your hormones.

Reaching for a food with a real accumulation ceiling to solve a deficiency nobody can demonstrate is a poor trade in any market.

The floor of this diet has not moved. Fatty ruminant meat, animal fat, eggs. Organs are a bonus for people who enjoy them, taken occasionally, in the sort of quantity that would fit inside the animal rather than inside a supplement bottle.

The Objection Worth Answering

There is survey data showing a slice of an Arctic population sitting close to the scurvy line, and it gets waved about as the trump card.

Check when those surveys were taken. They came after the flour, the sugar, the tinned goods and the trading post. That is not a study of a meat diet. That is a study of what happens to a meat diet when the store arrives, and it is an argument for my position rather than against it.

Wrapping Up

The question has been posed upside down from the start.

The interesting thing is not how a person avoids scurvy without fruit. It is why a person eating fruit needs ninety milligrams a day to stay clear of a disease that men on seal and penguin held off with a handful of milligrams and no plants whatsoever.

The requirement was never a fixed property of the human body. It is a function of the diet it gets measured in. Fill a man with sugar and seed oil and he will need a great deal of vitamin C, most of it spent cleaning up after the meal that delivered it. Take those away and the number falls somewhere nobody has bothered to look.

The sailors never needed the lime.

They needed the meat to be fresh. That was the entire trick, and it took an act of Parliament before anyone would say so out loud.

Vitamin C On Carnivore: Common Questions

How do carnivores get vitamin C?

From fresh meat, in small amounts, against a requirement that collapses once the carbohydrate is gone. Ascorbate is present in muscle meat at roughly two and a half micrograms per gram, and considerably more in organs. The reason that tiny quantity is sufficient is that vitamin C competes with glucose for entry to your cells, and most of it is otherwise spent cleaning up damage caused by sugar and seed oils.

How much vitamin C do you need on a carnivore diet?

Nobody has measured it, which is the honest answer. Every published requirement, including the ninety milligrams on the packet and the ten milligrams that prevents scurvy, was established in people eating carbohydrate. Every mechanism we can identify pushes the figure downwards on a zero carbohydrate diet, in some cases by orders of magnitude.

Can you get scurvy on the carnivore diet?

No case has been produced, despite the diet now having people years and in some cases decades into it. The historical scurvy epidemics happened on preserved meat, not fresh meat. Salting, curing, drying and long storage destroy ascorbate; a rare steak does not.

Does meat contain vitamin C?

Yes. The zero printed in food databases is an unmeasured field rather than a measured absence, and many assays only detect one of the two forms of ascorbate your body can use.

Do you need to eat liver for vitamin C?

No. Liver does contain more than an orange, but eating it daily takes you past the tolerable limit for vitamin A and accumulates copper. It is a bonus for people who enjoy it, not a requirement.

The Carnivore Foundations Series

• What Nutrients Are Lacking On A Carnivore Diet?
• Why You Don’t Need Antioxidants On Carnivore
• How Carnivore Meets Your Nutrient Needs
• The Benefits Of Organ Meats On Carnivore
• Why You Can’t Do Carnivore Without High Fat

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