Hittade det här inlägget på FB på 180degree och är skrivet av Matt Stones doktorskompis.
Vitamin D *supplements* may be making your "metabolic rate" much slower/worse. Why? One big reason is that they cause you to waste potassium through the kidneys. I don't have time for a whole blog post on this [well, after typing this up, maybe I did, I realized], and Matt and I did a whole 180D Radio podcast on the Vitamin D and calcium excess issue, so I will keep this as short as I can and mostly potassium-related.
First, Vitamin D *supplements* (not the sun-derived stuff) cause the body to retain calcium in the tissues and then waste potassium through the kidneys. This is referred to as hypercalcemia and hypokalemia, respectively.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC291035/?page=1In rats:
"The moderate renal wastage of potassium caused by vitamin D is most clearly appreciated when the kidneys are being maximally stimulated to retain this ion (i.e., after prior deprivation of potassium). It might be anticipated that renal losses of potassium secondary to hypercalcemia would produce potassium deficiency in patients only when food intake had been substantially reduced; in a preliminary survey this appeared to be the case (3). Nevertheless, it is noteworthy that in experiments in which potassium intake was not restricted, the potassium content of muscle was significantly lower in rats treated with vitamin D than in control animals (25)."
If you look in the research, hypercalcemia is well established from excess Vitamin D intake in humans as well, so hypokalemia can also be assumed from the above mechanism shown in rats. The optimal dose of potassium daily is nearly 5000mg. The number of people getting that intake from food alone is about as rare as a happy person at a low-carb convention. This combo (low intake + wasting) doesn't fare well long-term.
I can tell you that in my patients & clients who take Vitamin D supplements long enough, I often see that their blood tests eventually show high calcium and low potassium. This is reflected much earlier on their hair mineral analysis (so much so that I refer to it as a vitamin D pattern, high calcium and nearly non-existent potassium).
Anyway, now to the money part of today's post. Low potassium. I'm assuming that I'm talking to people who are eating a "normal" mixed diet (not raw vegan or fruitarian nonsense) and salt their food, like the seasoned 180D person. Symptoms of low blood and/or low hair potassium--and realize that one can have symptoms of subclinical, aka "you have the problems but it doesn't show on your yearly blood test"--from Medline Plus:
http://www.nlm.nih.gov/medlineplus/ency/article/000479.htm"Symptoms
A small drop in potassium level often does not cause symptoms. Or symptoms may be mild and include:
Abnormal heart rhythms (dysrhythmias), especially in people with heart disease
Constipation <--
Feeling of skipped heart beats or palpitations
Fatigue <--
Muscle damage
Muscle weakness or spasms
Tingling or numbness
A large drop in potassium level may slow your heartbeat. This can cause you to feel lightheaded or faint. A very low potassium level can even cause your heart to stop."
MORAL: Get your Vitamin D from the sun or other full-spectrum lights. Your body has major control over your D levels this way. Stop screwing up your tissue (cellular) calcium and potassium levels with Vitamin D supplements...which will likely be the biggest bust and cause the most long-term problems of any supplement fad EVER.
One last thing: Fixing the magnesium deficiency that I see in ***everyone*** will likely fix that Vitamin D deficiency of yours:
http://www.ncbi.nlm.nih.gov/pubmed/23981518"CONCLUSIONS: Our preliminary findings indicate it is possible that magnesium intake alone or its interaction with vitamin D intake may contribute to vitamin D status. The associations between serum 25(OH)D and risk of mortality may be modified by the intake level of magnesium."
--Dr. G
2024.11.24 - 07:35:43
