didn't cause mine (as a long term vegan), and the normal cuts of locally raised heritage tams don't seem to have been causing any trouble in the decade since msdx and going omni, either.
i'm not at all worried about risk associated with higher consumption of potted heid. an apples and oranges comparison afaic; just not in the rotation. not before msdx and not after.
unpacking some details from studies included, and adding a couple more for consideration:
Multiple sclerosis, latitude and dietary fat: Is pork the missing link? (1986)
https://www.ncbi.nlm.nih.gov/pubmed/3638477
"The correlation between pork consumption and MS prevalence was highly significant...
"In view of the many sources of error both in the dietary data and in prevalence studies of MS, our correlation should be interpreted with caution. However, the correlation between pork and MS prevalence is impressive enough and if it is valid, would imply that pork consumption is somehow related to the risk of developing MS . Alternatively, the correlation could imply a relationship between MS and an unknown environmental or dietary factor associated conditions of pork intake...
"How pork might increase the risk of developing MS is unknown. Alter, et al., have reviewed the mechanisms by which animal fat intake may be related to MS (5). One of these mechanisms is that a relative deficiency of essential fatty acids exists; this may be produced by a high intake of saturated fat (13). There is, however, no difference between the fat content of beef and pork (14). One major difference is the presence of greater amounts of linoleic acid in pork compared to beef (14). This difference would, however, make pork less likely than beef to increase risk for developing MS since recent studies have shown that linoleic acid reduces the severity and duration of relapses in MS (15). Another possibility is that the position of double bonds in the fatty acid chains are different in pork and beef fat (14). Whether this could affect the composition of myelin sheath lipid and make the individual more susceptible to develop MS is unknown."
i don't see any clear way to check the info presented in figure 1.
upon examination of referenced studies, no pork info is given in any of:
Norman JE, Kurtzke JF, Beebe CW. Epidemiology of multiple sclerosis in US veterans. J. Chronic Dis. 36: 551, 1983.
Kurland LT, Reed D. Geographic and climatic aspects of multiple sclerosis. Am. J. Public Health 54: 588, 1964.
Acheson ED, Bochrach CA, Wright FM. Some comments on the distribution of MS to latitude, solar radiation and other variables. Acta. Psychiat. Meurol.
Second. 35: 132, 1960.
Agranoff BW, Goldberg D. Diet and the geographic distribution of multiple sclerosis. J,ancet 2: 1061, 1974.
Alter M, Yamoor M, Harshe M. Multiple sclerosis and nutrition. Arch. Neurol. 31: 267, 1974.
Armstrong B, Doll R. Environmental factors and cancer incidence and mortality in different countries with special reference to dietary practices. Int. J. Cancer 15: 617, 1975.
Gray GE, Pike MC, Henderson BE. Breast cancer incidence and mortality rates in different countries in relation to known risk factors and dietary practices. Br. J. Cancer 39:1_, 1979.
Kurtzke JF. A reassessment of the distribution of multiple sclerosis. Acta Neurol. Stand. 51:110, 1975.
Kurtzke JF. Geographic distribution of multiple sclerosis. an update with special reference to Europe and the Mediterranean region. Acta Neurol. Stand. 62:65, 1980.
Swank RL. Multiple sclerosis: twenty years on a low fat diet. Arch. Neurol. 23:460, 1970.
still no pork info, but does provide info on study n in the abstract, specifically that the combined total patients and controls for the three studies is 87 and 85 respectively:
Dworkin RH, Bates D, Millar JHD, Patry DW. Linoleic acid and multiple sclerosis - a reanalysis of three double blind trials. Neurology 34: 1984.
rat study
Holman RT. The ratio of trienoic: tetranoic acids in tissue lipids as a measure of essential fatty acid requirement. J. Nutr. 70: 405, 19GO.
for this item, no useful descriptive info found online. no indication that there is any info on consumption or geographic distribution
Considine DM. Food and Food Products Encyclopedia. Von Nostrand Reinhold Co. New York, N.Y. 1982.
can't seem to check this yearbook out online:
Food and Agricultural Organization of the United Nations. Production Yearbook. FAO, Rome, 1975-1983.
a bunch of these are available, all of which refer to the yearbook:
The state of food and agriculture
http://www.fao.org/docrep/017/ap656e/ap656e.pdf
i'm not sure what a production yearbook says about consumption exactly. in the one seemingly related doc i've found so far, of 19 references to pigmeat, 3 pieces o quantitative data describe volume of exports globally, and western europe's share of import vs export volume. not regionally comprehensive, in this one at least.
this next item can't be readily reviewed. available online docs refer to baby food, fruits/juices and fats/oils
Watt BK, Merrill AL. Computation of foods. Agriculture Handbook, No. 8. U.S. Dept. of Agriculture, Consumer and Food Economics Institute, Washington,
D.C., 1975.
overall, i'm not convinced by this article. published in med hypotheses.
does anyone know if any other author or authors have been able to replicate this study's approach and its findings?
on to the next thing:
Nutritional factors in the aetiology of multiple sclerosis: a case-control study in Montreal, Canada (1998)
https://academic.oup.com/ije/article/27/5/845/652592
"The relation between nutritional factors and MS was studied among 197 incident cases and 202 frequency matched controls in metropolitan Montreal during 1992-1995...
"With respect to specific foods (as opposed to nutrients), a higher intake of fruit juices was inversely associated with risk (OR = 0.82; 95% CI: 0.74-0.92)."
"A protective effect was also observed with cereal/breads intake for all cases combined (OR = 0.62; 95% CI: 0.40-0.97) and for fish among women only"
"pork/hot dogs (OR = 1.24; 95% CI: 1.02-1.51) and sweets/candy (OR = 1.29; 95% CI: 1.07-1.55) were positively associated with risk."
"Table 4 depicts the risk of MS per 100-g unit intakes of various foods or food groups. The meat group, consisting of pork, ham, luncheon meat, hot dogs, sausages or other processed meats, augmented risk in all subjects (OR = 1.24; 95% CI: 1.02-1.52)."
so smallish study, meat group including pork (with an emphasis on processed products) augments risk. i'm not quite sure how to interpret risk "per 100g unit"
next, a huge study n, meat group includes pork, relative risk varies across intake quintiles:
Dietary Fat in Relation to Risk of Multiple Sclerosis among Two Large Cohorts of Women (2000)
https://pdfs.semanticscholar.org/aea9/0 ... 0c4287.pdf
For the analyses presented here, women were excluded from the 1980 baseline population if they completed a 1980 dietary questionnaire with an implausible total energy intake (i.e., <500 or >3,500 kcal/day) or if they left more than 10 food items blank.
These exclusions left a total of 92,422 women for the analyses.
The associations between the food groups high in fat and the risk of MS are presented in table 4.
Intakes of dairy products, fish or other seafood, red meats, poultry, and processed meats were also not significantly associated with the risk of MS.
from table 4
relative risk by intake quintile for processed meats (incl bacon)
...........................RR.....95% CI........RR.....95% CI........RR.....95% CI.........RR.....95% CI........RR.....95% CI......p for trend
Pooled NHS I/II.....1.0......................1.3.....(0.8,2.1)......1.2.....(0.8, 2.0) .....1.3....(0.8, 2.1).....1.0....(0.6, 1.7) 0.68
another smallish study, finds high weekly meat intake but not specifically high weekly pork intake increaes risk of ms:
Risk factors of multiple sclerosis: a case-control study (2003)
https://www.ncbi.nlm.nih.gov/pubmed/14658040
"The variables associated with a significant risk of MS included: contact with animals in general and with pet birds and fowls in particular; consumption of meat five or
more time per week; vaccination against measles, rubella, mumps and varicella; right-handedness; family history of MS, autoimmune disease, thyroiditis, rheumatic disorders, diabetes mellitus and migraine; and comorbidity with autoimmune diseases and migraine...
"Table 1 Presence of familial and environmental risk factors associated with multiple sclerosis (MS) in 140 cases and 131 controls. Odds ratios (OR) and 95% confidence intervals (CI) are presented
Variable.............................................Cases (n=140)..........Controls (n=131).............OR 95%................CI
Consumption of meat (≥5 times/week)........22............................9..............................2.6..................1.1–5.8
Consumption of pork (≥5 times/week).........12............................8..............................1.5..................0.6–3.8"
5+ times per week tho! more like once, here.
in review:
1. could pork connect some dots? open question.
2. processed meat including pork increases ms risk (smallish n)
3. processed meat including pork does not increase ms risk (huge n)
4. 5+ servings per week meat consumption but not 5+ spw pork consumption increases ms risk (smallish n)
my conclusion: pork stays in the rotation at current levels, ie most often one serving per week, that being 2 pcs bacon with one breakfast on the weekend (back bacon btw, 2.2 g sat fat; 11% of RDA - compare regular bacon sat fat 14g).
hot dogs, NEVER NEVER NEVER.
sometimes pork makes its way into a dinner (last time, tenderloin - 1.2 g sat fat). or a bone will provide stock for split pea soup (that last is on my list of things to do for this eve)