Grok may have been my figurative ancestor, but my literal ancestors were Scandinavian for 50 generations or so. They ate a "white" diet of bread, dairy, cod, salt and sugar out of necessity. Not much meat eating other than fish, and the meat was well cooked or preserved, rarely fresh. No fresh fruit or vegetables to speak of.
This is the diet I am adapted to eat. If I quit eating it will I lose the ability to digest it?
I believe that we can become more sensitive by avoidance. The basic premise of allergy shots is to build up a tolerance by being exposed to the substance in ever increasing amounts. Avoiding the substance all together could have the opposite outcome in my opinion. I experienced this with dairy. I was a dairy freak until Paleo. After giving it up for a few months, I paid the price when I reintroduced it. Still trying to find a happy medium. I have also experienced this with fruits.
Inducing allergies is not possible, although sensitivities often go undetected for years. Elimination diets are a great way to isolate an offending food to better observe its effects on your body upon reintroduction. If you are sensitive to wheat or dairy, you could notice improvements after strict avoidance for several weeks - sometimes a month or more. Some people develop serious allergies in adulthood (shellfish is classic), but that wouldn't likely be caused by avoiding then reintroducing a food. However, you could experience the same issue of reacting more strongly after avoiding.
No, you aren't adapted to the diet your scandinavian ancestors ate and you won't loose the ability to digest those modern foods.
You are partially adapted, though. While salt, dairy and cod are not a problem the adaption to cereals and refined carbs that may have occured is not enough for you. People of scandinavian descent have especially high risks for western diseases like cancer and cardiovascular diseases. They had much less time to adapt to carbohydrate rich cereal foods than people in southern europe for example.
I see no reason that raw milk products are bad when consumed by healthy individuals. We have to evaluate food not only from a evolutionary perspective but also what contemporary science tells us about its biochemistry, nutritional quality and effect on humans.
Cereals are a different story. Not only do we have evidence that they were first introduced in massive quantities only a few thousand years ago, but even science has discovered abundant negative effects on overall health, reporting that grains are involved in nearly every degenerative disease known to mankind.
And no, avoidence of wheat and dairy can you only do good. I don't know if you really mean allergies or just food sensitivies.
People today seem to be sensitive to just everything.
Environmental chemicals, lectins, a weakend immune system, stress, sleep deprivation, nutritional deficiencies, antibiotics in excess, refined sugar, not being breast-fed, candida are but a few factors which lead to greater intestinal permeability.
All those things attack the intestinal lining, making it susceptible for undigested food proteins to go into the body and provoke autoimmune responses.
If you avoid foods which are known to damage the intestine you can heal your leaky gut.
To answer your question, with a healed gut you are even better able to tolerate neolithic foods because it is more unlikely that undigested food molecules enter your blood.
Many people experienced that, after a few years on a carbohydrate restricted paleo diet, they are able again to digest food they were sensitive to. Like dairy, eggs, or even traditional bread.
It is true that we can eat a diet which contains grains, if they are sorougly fermented and the diet is nutrient-reach overall. That's what Weston Price showed us. Degeneration occurs with processed, nutrient-deficient food which isn't prepared to destroy the anti-nutrients. That doesn't mean it's optimal, but at least this is the way to go if we only have those kinds of food available.
But since most people today are exposed to so many "agents of disease", it is necessary to go paleo so that real healing can occure because we are health-wrecks compared to a healthy born Weston Price-style baby.
Personally I believe that not only diet but also modern chemicals and heavy metals, medication, stress, trauma and sleep deprivation combined provoke the diseases which are so common today. But anyway, it can only be good to avoid certain neolithic foods for sometime to heal, you won't loose your ability to digest them. Though you can notice food sensitivies later because your body became more sensitive due to abstinence
I don't know if it gets to be that severe, but I find that when you cut something from your diet, you tend to be more aware of the effects they have on your body when you eat them.
For instance, when I fill up on Paleo foods I feel full, but not bloated and sluggish. Eat some bread, and feel like I've scarfed down a dish sponge and chased it down with a glass of water. I feel bloated for hours afterward.
Folks that are sensitive to nightshades (esp peppers and tomatoes) often feel their joints ache after eating those foods.
It's highly individual and not always consistent.
This is why I eat gluten on purpose every now and then. Because I don't want to become intolerant.
It's not because "I want to eat gluten."
It's because "I don't want to not be able to eat gluten."
I don't want to not be able to drink a beer, or have some kinda of bread item or whatever.
I see it as a gluten intolerant insurance policy.
Many people of Northern European descent are well adapted to dairy. My 91 year old father eats ice cream every day. My 90 year old mother several times a week. Both can easily drink a large glass of milk without any problems. No one in my extended family has any dairy issues at any age. Unnecessarily giving up dairy eliminates many useful and wonderful foods. I gave up wheat without any direct evidence of problems. But I'm not giving up dairy if the only reason is that it causes other people problems. Look at Weston Price's historical report on the health of the Primitive Swiss.
I eliminated dairy for about 1 1/2 years after which I reintroduced large quantities of raw milk, cheese and butter with no problem. I still do about 1/2 gallon of pastuerized milk and some butter and feel fine.
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