Quote from
lil chick on November 18, 2019, 12:27 pm
I just looked at a study that was wondering what vitamins and minerals should be taken during expeditions in the cold. One of the discussions was about VA. There were some interesting points raised. The study is here: https://www.ncbi.nlm.nih.gov/books/NBK232871/
I was remembering back that the WAPF stated (https://studyres.com/doc/8059207/part-ii---weston-a.-price-foundation) (on page 45): "Vitamin A is depleted by: STRESS, EXCESS DIETARY PROTEIN, COLD WEATHER, FEVER AND ILLNESS, PHYSICAL EXERTION, EXPOSURE TO TOXINS". As I seem to be having some trouble with the cold, I decided to look into whether the cold is burning up my VA.
The article I read today said that a polar expedition was starving and was eating it's sled dogs as each dog died. They ate the livers, became toxic, and then they themselves died. Interesting that the sled dogs died of starvation in the cold, yet their livers were STILL FULL OF VA (enough to kill the explorers)!
Now, there is some other info there about how arctic diets are often high in VA, and that cold-adapted rats need a slightly higher VA intake than warm-adatpted rats. However, the general gist was:
"Caution is recommended regarding the consumption of even modest supplements of vitamin A by persons working in cold or high-altitude environments due to the mobilization and utilization of body fat that often occurs under these circumstances and the resultant release of vitamin A stores into the circulation.
It has been reported that 6 months to 2 years is required for a person consuming a vitamin A-deficient diet to become deficient. Thus, there is little justification to recommend intakes of vitamin A above RDA or MRDA levels"
A few supplements are suggested in the article, if they are not adequate in the food that is brought on the expedition, for instance: E, C, and pantothenic acid.
I just looked at a study that was wondering what vitamins and minerals should be taken during expeditions in the cold. One of the discussions was about VA. There were some interesting points raised. The study is here: https://www.ncbi.nlm.nih.gov/books/NBK232871/
I was remembering back that the WAPF stated (https://studyres.com/doc/8059207/part-ii---weston-a.-price-foundation) (on page 45): "Vitamin A is depleted by: STRESS, EXCESS DIETARY PROTEIN, COLD WEATHER, FEVER AND ILLNESS, PHYSICAL EXERTION, EXPOSURE TO TOXINS". As I seem to be having some trouble with the cold, I decided to look into whether the cold is burning up my VA.
The article I read today said that a polar expedition was starving and was eating it's sled dogs as each dog died. They ate the livers, became toxic, and then they themselves died. Interesting that the sled dogs died of starvation in the cold, yet their livers were STILL FULL OF VA (enough to kill the explorers)!
Now, there is some other info there about how arctic diets are often high in VA, and that cold-adapted rats need a slightly higher VA intake than warm-adatpted rats. However, the general gist was:
"Caution is recommended regarding the consumption of even modest supplements of vitamin A by persons working in cold or high-altitude environments due to the mobilization and utilization of body fat that often occurs under these circumstances and the resultant release of vitamin A stores into the circulation.
It has been reported that 6 months to 2 years is required for a person consuming a vitamin A-deficient diet to become deficient. Thus, there is little justification to recommend intakes of vitamin A above RDA or MRDA levels"
A few supplements are suggested in the article, if they are not adequate in the food that is brought on the expedition, for instance: E, C, and pantothenic acid.
