mercredi 8 février 2012

Med diet and the agrofood industry

It is of great interest to read in this paper of the BMJ that med diet is difficult to follow in UK for several reasons: namely, availability, prices and taste of med nutrients. Except for taste, it seems to me that these obstacles are the same on the continent, especially in urban areas either in med countries or other non med countries even Spain.
To explain that one must describe the main obstacle to consuming a med diet and which is widely underestimated in the comments: I mean the present state of products from the agribusiness.
The production of agriculture and breeding were so deeply transformed since WWII, that our food environment is completely different. We don't eat grassfed meat of ruminants but processed products made of cornfed sedentary obese animals heavily transformed by heating, mincing, mixing, sterilising and so on. Wild meat is below 10% of fat and crops are now > 25% fat. We know that processed meat is a recognised factor for colon cancer and other chronic diseases. We don't eat the same cereals because they are now products made of refined corn or wheat, high temperature cooked, sugared, mixed with trans fats, with added multivitamins. Consumption of high GI foods and fructose is clearly associated with D2. We don't eat the same olive oil because med populations consume olives, non refined and unfiltered olive oil and a lot of wild greens or crops naturally rich in alphalinoleic acid. Instead at best we buy white salads like the iceberg one which is depleted in phytonutrients and alphalinoleic acid and we pour on it sunflower oil which is pure W6 linoleic acid. Consequently a dramatic change has occurred in the W6/W3 ratio of PUFA which is in favor of inflammation--a common final way of chronic diseases. We don't eat the same dairy products because more than 80% of them are sugared, flash pasteurised, and made with milk from cow fed cornstarch... 
This kind of examples are endless. 
But the question is: Why do we consume these foods? Is it a clear choice or a mandatory buying in the different supermarkets which sell the same industrialised products? Clearly the anwer is: the agrofood industry and the low cost of goods transportation (at least until oil reach new unsustainable prices) had standardised food in a way which is not compatible with our genome. It is impossible for our genome to adapt in only fifty years to those dramatic changes... 
Consequently med diet for all demands a change in agriculture and breeding. The recent policies toward more sustainable and energy efficient farming are in favor of the med diet. Other changes need to occur and it seems to me that medicine must take charge of them.
BMJ:


Cooking or not cooking?

1/ Cooking was used in an economy of survival since all times. Cooking roots or hard leaves is mandatory but not meat nor fish nor fruits nor other leaves. 
2/ It is only in the era of cheap and abundant energy (one hundred years ago) that our habit of cooking all food and recooking a substantial amount of them occurred. We cooked to digest non edible stuff like cereals and to increase the amount of calories absorbed by our digestive tract. We also cooked in order to produce some other factors linked to flavors and Maillard products.
3/ On the other hand modern cooking at high temperatures diminish drastically the content of non caloric nutrients, oxidised fats and create xenobiotic molecules at a time where we are aging in urban areas and need more micronutrients instead of more calories.
4/ Apart from child mortality the lifespan of hunter gatherer was not ours because of famine, accidents and severe infections or parasites. Yes some of them could have died at old ages but they were few because of the uncertainty of food supply, the dangers of wild life and the absence of efficient care. So the assumption of a doubling average lifespan in our times is robust. In this perspective and according to epidemiological studies like those conducted in Okinawa island it is fact based to warn our population on the risks of cooking all their food especially at high temperature or directly on fire either because of the destruction of non caloric nutrients or because of the generation of organic molecules which have carcinogenic properties.
5/ BTW when I saw paleo eaters grilling their stuff every day I think they buy paleo but they eat modern cooked food. The result will not be as they expect it.

mardi 7 février 2012

Doser la Vitamine D

Il faut demander le dosage de la vitamine D2 et D3, appelé 25 OH vitamine D totale.
Le cout en Europe est de 50 euro environ bien trop élevé encore mais il y a peu de concurrence.
Les dosages séparés de D2 et D3 ne sont d'aucune utilité sauf pour le laboratoire qui facture plus cher.
En revanche il est plus efficace de supplémenter en D3.
https://www.swe.siemens.com/france/web/fr/diagnostics/actualite/presse/Pages/vitamineD_ADVIA_centaur.aspx
http://www.rochediagnostics.fr/Htdocs/media/pdf/publications/10MBIO84_4_5.pdf

On peut ensuite calculer différents paramètres grace à:
http://www.google.fr/url?sa=t&rct=j&q=d-estimator&source=web&cd=2&ved=0CDAQFjAB&url=http%3A%2F%2Fwww.vitamind3-cholecalciferol.com%2Fdownloads%2FD-Estimator.xls&ei=Tdc0T5iKMqTG0QXvyfivAg&usg=AFQjCNFWN8fh2gIfrw-Sibzn7AQtW90oYA&sig2=m3DHEaglMRB1GftNlBIO8A&cad=rja

Autre document intéressant sur ce dosage
http://www.medical.siemens.com/siemens/en_GLOBAL/gg_diag_FBAs/files/products_disease_states/bone_metabolism/VitaminD_Advertorial_S4_FINAL.pdf

et

http://www.medical.siemens.com/siemens/en_GLOBAL/gg_diag_FBAs/files/products_disease_states/bone_metabolism/BrusselsVitaminD3.pdf

Roasted coffee beans: a carcinogen food?

Coffee beans are NOT a problem, like cacao beans and they were probably chewed py our ancestors who would have recognized their adaptogen properties.
The problem is roasting and especially industrial roasting at high temperature (>300°C). It brings in your body acrylamide and other molecules which are true carcinogens.
Slow roasting is preferable, but green tea is a safer source of caffein...