In the 18th century British Navy, “Soldiers and sailors typically got one pound of bread a day,” in the form of hard tack, a hard biscuit. That is according to James Townsend. On top of that, some days they had been given peas and on other days a porridge called burgoo. Elsewhere, Townsend shares a some info from a 1796 memoir of the period — the author having written that, “every man and boy born on the books of any of his Majesty’s ships are allowed as following a pound of biscuit bread and a gallon of beer per day” (William Spavens, Memoirs of A Seafaring Life, p. 106). So, grains and more grains, in multiple forms, foods and beverages.
About burgoo, it is a “ground oatmeal boiled up,” as described by Townsend. “Now you wouldn’t necessarily eat that all by itself. Early on, you were given to go with that salt beef fat. So the slush that came to the top when you’re boiling all your salt beef or salt pork. You get all that fat that goes up on top — they would scrape that off, they keep that and give it to you to go with your burgoo. But later on they said maybe that cause scurvy so they let you have some molasses instead.”
They really didn’t understand scurvy at the time. Animal foods, especially fat, would have some vitamin C in it, whereas the oats and molasses had none. They made up for this deficiency later on by adding in cabbage to the sailors’ diet, though not a great choice considering vegetables don’t store well on ships. I’d point out that it’s not that they weren’t getting enough vitamin C, at least for a healthy traditional diet, as they got meat four days a week and even on the other meat-free banyan-days they had some butter and cheese. That would have given them sufficient vitamin C for a low-carb diet, especially with seafood caught along the way.
A high-carb diet, however, is a whole other matter. The amount of carbs and sugar sailors ate daily was quite large. This came about with colonial trade that made grains cheap and widely available, along with the sudden access to sugar from distant sugarcane plantations. Glucose competes with the processing of vitamin C and so requires higher intake of the latter for basic health, specifically to avoid scurvy. A low-carb diet, on the other hand, can avoid scurvy with very little vitamin C since sufficient amounts are in animal foods. Also, a low-carb diet is less inflammatory and so this further decreases the need for antioxidants like vitamin C.
This is why Inuit could eat few plants and immense amounts of meat and fat. They got more vitamin C on a regular basis from seal fat than they did from the meager plant foods they could gather in the short warm period of the far north. But with almost no carbohydrates in the traditional Inuit diet, the requirement for vitamin C was so low as to not be a problem. This is probably the same explanation for why Vikings and Polynesians could travel vast distances across the ocean without getting sick, as they were surely eating mostly fresh seafood and very little, if any, starchy foods.
Unlike protein and fat, carbohydrate is not an essential macronutrient. Yes, carbohydrates provide glucose that the body needs in limited amounts, but through gluceogenesis proteins can be turned into glucose on demand. So, a long sea voyage with zero carbs would never have been a problem.
Sailors in the colonial era ate all of those biscuits, porridge, and peas not because it offered any health value beyond mere survival but because it was cheap food. Those sailors weren’t being fed to have long, healthy lives as labor was cheap and no one cared about them. As soon as a sailor was no longer useful, he would no longer be employed in that profession and he’d find himself among the impoverished masses. For all the health problems of a sailor’s diet, it was better than the alternative of starvation or near starvation that so many others faced.
Grain consumption had been increasing in late feudalism, but peasants still maintained wider variety in their diet through foods they could hunt or gather, not to mention some fresh meat, fat, eggs, and dairy from animals they raised. That all began to change with the enclosure movement. The end of feudal village life and loss of the peasants’ commons was not a pretty picture and did not lead to happy results, as the landless peasants evicted from their homes flooded into the cities where most of them died. The economic desperation made for much cheap labor. Naval sailors with their guaranteed rations, in spite of nutritional deficiencies, were comparably lucky.
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This understanding of low-carb, animal-based diets isn’t new either. If you look back to previous centuries, you see that low-carb diets have been advocated going back to the late 1700s. Advocating such diets prior to that was irrelevant since low-carb was the dietary norm that was assumed without being needing to be stated.
Only beginning a couple of centuries ago did new forms of agriculture take hold that created large surplus yields for the first time in human existence. Suddenly, right when a high-carb diet became possible for a larger part of the population, it was unsurprising that the health problems of a high-carb diet began to appear and so the voices for low-carb soon followed.
In prior centuries, one even sees examples in old books describing the health advantages of animal foods. But I’m not sure if anyone made such connections of high-carb diets to scurvy until more recently. Still, this understanding is older than most people realize, going back at least to the late 1800s. L. Amber O’Hearn shares the following passages from (C is for Carnivore):
Selected notes from the Lancet volume 123
You can find this in Google books .
p 329. From a medical report from Mr. W. H. Neale, M.B. B.S. medical officer of the Eira, about an Arctic expedition:
“For the boat journey we saved 40 lb. of tinned meat (per man), and 351b. of tinned soups(per man), 3cwt. of biscuit, and about 800lb. of walrus me it, which was cooked and soldered up by our blacksmith in old provision tins. About 80 lb. of tea were saved, enabling us to have tea night and morning till almost the day we were picked up. No lime-juice was saved. A few bottles of wine and brandy were secured, and kept for Mr. Leigh-Smith and invalids. All the rum was saved, and every man was allowed one-fifth of a gill per day until May 1st, 1882, when it was decided to keep the remaining eighteen gallons for the boats. One man was a teetotaler from January to June, and was quite as healthy as anyone else. Personally it made very little difference whether I took the allowance of “grog” or not. One of the sick men was also a teetotaler nearly all the time. During the boat journey the men preferred their grog when doing any hard work, a fact I could never agree to, but when wet and cold a glass of grog before going to sleep seemed to give warmth to the body and helped to send one to sleep. Whilst sailing, also, one glass of grog would give temporary warmth ; but everyone acknowledged that a mug of hot tea was far better when it was fit weather to make a fire. I do not think that spirits or lime-juice is much use as anti scorbutics ; for if you live on the flesh of the country even, I believe, without vegetables, you will run very little risk of scurvy. There was not a sign of scurvy amongst us, not even an anaemic face. I have brought home a sample of bear and walrus meat in a tin, which I intend to have analysed if it is still in good preservation ; and then it will be a question as to how it will be best to preserve the meat of the country in such a form as to enable a sufficient supply to be taken on long sledge journeys ; for as long as you have plenty of ventilation and plenty of meat, anyone can live out an Arctic winter without fear of scurvy, even if they lie for days in their beds, as our men were compelled to do in the winter when the weather was too bad to go outside (there being no room inside for more than six or seven to be up at one time).”
p331, John Lucas: “Sir, —A propos the annotation appearing under the above heading in The Lancet of June 24th, pp. 1048-9, I would beg permission to observe that almost every medical man in India will be able to endorse the views of Dr. Moore, to which you refer. Medical officers of native regiments notice almost daily in their hospital practice that—to use your writer’s words—”insufficient diet will cause scurvy even if fresh vegetable material forms a part of the diet, though more rapidly if it is withheld.” Indeed, so far as my humble experience as a regimental surgeon from observations on the same men goes, I am inclined to think that the meat-eating classes of our Sepoys—to wit, the Mahomedans, especially those from the Punjaub—are comparatively seldom seen with the scorbutic taint ; while, on the contrary, the subjects are, in the main, vegetable feeders who are their non-meat-eating comrades, the Hindus (Parboos from the North- West Provinces and Deccan Mahrattas), especially those whose daily food is barely sufficient either in quality or quantity. A sceptic may refuse to accept this view on the ostensible reason that though the food of the meat-eating classes be such, it may, perchance, contain vegetable ingredients as well as meat. To this I would submit the rejoinder that as a matter of fact, quite apart from all theory and hypothesis, the food of these meat-eating classes does not always contain much, or any, vegetables. In the case of the semi-savage hill tribes of Afghanistan and Baluchistan, their food contains large amounts of meat (mutton), and is altogether devoid of vegetables. The singular immunity from scurvy of these races has struck me as a remarkable physiological circumstance, which should make us pause before accepting the vegetable doctrine in relation to scurvy et hoc genus omne.”
p370 Charles Henry Ralphe “To the Editor of The Lancet. Sir, —I was struck by two independent observations which occurred in your columns last week with regard to the etiology of scurvy, both tending to controvert the generally received opinion that the exclusive cause of the disease is the prolonged and complete withdrawal of succulent vegetables from the dietary of those affected. Thus Mr. Neale, of the Eira Arctic Expedition, says : ” I do not think that spirit or limejuice is of much use as an anti scorbutic ; for if you live on the flesh of the country, even, I believe, without vegetables, you will run very little risk of scurvy.” Dr. Lucas writes: “In the case of the semi- savage hill tribes of Afghanistan and Beluchistan their food contains a large amount of meat, and is altogether devoid of vegetables. The singular immunity from scurvy of these races has struck me as a remarkable physiological circumstance, which should make us pause before accepting the vegetable doctrine in relation to scurvy.” These observations do not stand alone. Arctic voyagers have long pointed out the antiscorbutic properties of fresh meat, and Baron Larrey, with regard to hot climates, arrived at the same conclusion in the Egyptian expedition under Bonaparte, at the end of last century.”
p495 “SCURVY. Dr. Buzzard, in a letter which appeared in oar columns last week, considers the fact that the crew of the Eira were supplied with preserved vegetables tells against the supposition advanced by Mr. Neale, that if Arctic voyagers were to feed only on the flesh of the animals supplied by the country they would be able to dispense with lime-juice. The truth is, it is an open question with many as to the relative antiscorbutic properties of preserved vegetables, and whether under the circumstances in which the Eira’s crew were placed they would have been sufficient, in the absence of lime-juice and fresh meat, to have preserved the crew from scurvy. A case in point is the outbreak that occurred on board the Adventure, in the surveying voyages of that vessel and the Beagle. The Adventure had been anchored in Port Famine for several months, and although “pickles, cranberries, large quantities of wild celery, preserved meats and soups, had been abundantly supplied,” still great difficulty had been experienced in obtaining fresh meat, and they were dependent on an intermittent supply from wild-fowl and a few shell-fish. Scurvy appeared early in July, fourteen cases, including the assistant-surgeon, being down with it. At the end of July fresh meat was obtained; at first it seemed to prove ineffectual, but an ample supply being continued, the commander was able to report, by the end of August, ” the timely supply of guanaco meat had certainly checked the scurvy.” This is an instance in which articles of diet having recognised antiscorbutic properties proved insufficient, in the absence of lime-juice and fresh meat, and under conditions of exceptional hardship, exposure, and depressing influence, to prevent the occurrence of scurvy. So with the Eira, we believe that had they not fortunately been able to obtain abundant supplies of fresh meat, scurvy would have appeared, and that the preserved vegetables in the absence of lime-juice would have proved insufficient as antiscorbutics. This antiscorbutic virtue of fresh meat has long been recognised by Arctic explorers, and, strangely, their experience in this respect is quite at variance with ours in Europe. It has been sought to explain the immunity from the disease of the Esquimaux, who live almost exclusively on seal and walrus flesh daring the winter months, by maintaining that the protection is derived from the herbage extracted from the stomach of reindeer they may kill. In view, however, of the small proportion of vegetable matter that would be thus obtained for each member of the tribe, and the intermittent nature of the supply, it can hardly be maintained that the antiscorbutic supplied in this way is sufficient unless there are other conditions tending in the same direction. And of these, one, as we have already stated, consists probably in the fact that the flesh is eaten without lactic acid decomposition having taken place, owing either to its being devoured immediately, or from its becoming frozen. The converse being the case in Europe, where meat is hung some time after rigor mortis has passed off, and lactic acid develops to a considerable extent. This seems a rational explanation, and it reconciles the discrepancy of opinion that exists between European and Arctic observers with regard to meat as an antiscorbutic. In bringing forward the claims of the flesh of recently killed animals as an antiscorbutic, it must be understood that we fully uphold the doctrine that the exclusive cause of scurvy is due to the insufficient supply of fresh vegetable food, and that it can be only completely cured by their administration ; but if the claims advanced with regard to the antiscorbutic qualities of recently slaughtered flesh be proved, then we have ascertained a fact which ought to be of the greatest practical value with regard to the conduct of exploring expeditions, and every effort should be made to obtain it. Everything, moreover, conducive to the improvement of the sailor’s dietary ought to receive serious consideration, and it has therefore seemed to us that the remarks of Mr. Neale and Dr. Lucas are especially worthy of attention, whilst we think the suggestion of the former gentleman with regard to the use of the blood of slaughtered animals likely to prove of special value.”
p913 “Sir, —In a foot-note to page 49G of his ” Manual of Practical Hygiene,”, fifth edition, (London, Churchill, 1878), Parkes says : —”For a good deal of evidence up to 1818, I beg to refer to a review I contributed on scurvy in the British and Foreign. Medico-Chirurgical Review in that year. The evidence since this period has added, I believe, little to our knowledge, except to show that the preservation and curative powers of fresh meat in large quantities, and especially raw meat (Kane’s Arctic Expedition), will not only prevent, but will cure scurvy. Kane found the raw meat of the walrus a certain cure. For the most recent evidence and much valuable information, see the Report of the Admiralty Committee on the Scurvy which occurred in the Arctic Expedition of 1875-76 (Blue Hook, 1877).” I think that the last sentence in the above is not Parkes’ own, but that it must have been added by the editor in order to bring it up to the date of the issue of the current edition. The experience since then of the Arctic Expedition in the Eira coincides with these. I refer to that portion of the report where the author tells us that “our food consisted chiefly of War and walrus meat, mixing some of the bear’s blood with the soup when possible.” And again: “I do not think that, spirits or lime-juice is much use as an antiscorbutic, for if you live on the flesh of the country, even, I believe, without vegetables, you will run very little risk of scurvy. There was not a sign of scurvy amongst us, not even an anaemic face,” (Lancet, Aug. 26th.) So that, as far as this question of fresh meat and raw meat and their prophylactic and curative properties are concerned, ample evidence will be found in other published literature to corroborate that of the Eira. But when you take up the question of the particular change which takes place in meat from its fresh to its stale condition, you will find a great deal of diversity and little harmony at opinion. Without taking up other authors on the subject, we stick to Parkes and compare his with Pr. I ; life’.-, views on this point. Parkes thought “fresh, and especially raw meat, is also useful, and this is conjectured to be from its amount of lactic acid ; but this is uncertain,”1 while on the other hand Dr. Ralfe repeats, as a probable explanation, too, of the reason of fresh meat being an anti scorbutic, but that it is due to the absence of lactic acid. For, from well-known chemical facts he deduces the following: — ” In hot climates meat has to be eaten so freshly killed that no lime is allowed for the development of the lactic acid : in arctic regions the freezing arrests its formation. The muscle plasma, therefore, remains alkaline. In Europe the meat is invariably hung, lactic acid is developed freely, and the muscle plasma is consequently acid. If, therefore, scurvy is, as I have endeavoured to show (“Inquiry into the General Pathology of Scurvy”), due to diminished alkalinity of the blood, it can be easily understood that meat may be antiscorbutic when fresh killed, or frozen immediately after killing, but scorbutic when these alkaline salts have been converted into acid ones by lactic acid decomposition.'”-‘ The view of the alkalinity of the blood coincides with Dr. Garrod’s theory, which, however, appears to have as a sine qua turn the absence of a particular salt- namely, potash. I am inclined to think that, taking into account the nervous symptoms which are not infrequently associated with a certain proportion of scorbutic cases, resulting probably from the changes taking place in the blood, not unlike those which occur in gout and rheumatism, there must be some material change produced in the sympathetic system. In many of the individuals tainted with scurvy there were slight and severe attacks of passing jaundice in the cases which occurred in Afghanistan. Can we possibly trace this icteric condition to this cause? This is but a conjecture so far. But there certainly is in Garrod’s observations an important point which, if applicable to all countries, climates, and conditions of life, is sufficiently weighty to indicate the necessity for farther research in that direction, and that point is this : the scorbutic condition disappeared on the patient being given a few grains of potash, though kept strictly on precisely the same diet which produced scurvy. —I am, Sir, yours truly, Ahmedabad, India, 30th Sept., 1882. JOHN C. LUCAS.”