Gondwanaland
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People who eat lots of vegetables should eat them with enough fat (methyl donors) such as extra virgin olive oil on the leafy greens or butter to broil vegetables.
Having said that, an experiment on rats showed that high dose folic acid (without the needed accompanying methyl donors) during pregnancy caused insulin resistance in the offspring.
A study in humans showed that folate and B12 supplementation reversed metabolic syndrome, improving insulin sensitivity and lowering homocysteine
I think that the insulin sensitivity has been completely overlooked on this forum, along with blood cell synthesis. People take huge amounts on folate and B12 ignoring that it can cause hypoglycemia and acidosis, plus it will promote the recruitment of other B vitamins and minerals for blood cell synthesis. Additionally, the B vitamins and minerals which can be quickly depleted by an unbalanced supplementation are involved in hormonal and neurotransmitter balance.
A study has been posted by someone else before showing that unmetabolized folic acid can build up, blocking the use of active folate.
This causes or worsens B12 deficiency and insulin resistance, causing epigenetic changes and predisposing the offspring to IR and obesity.
In my personal interpretation, excess of methylfolate intake can have the following adverse outcomes in regards to insulin resistance:
- first methyfolate can make one who doesn't have IR hypoglycemic, causing panick attacks, acidosis, mood swings etc
- secondly, excess methyfolate will build up and create/worsen insulin resistance, leading to a huge need for potassium (and B1, choline and magnesium).
PS to check for IR one needs the blood tests of fasting insulin, fasting glucose, insulinemic curve and HbA1c
The supplement folic acid is a synthetic, inactive form that requires more methyl donors to be activated than food folate.J Nutr. 2011 Mar;141(3):531-4. doi: 10.3945/jn.110.130369. Epub 2011 Jan 26.
Nutritional genomics: defining the dietary requirement and effects of choline
It is important to recognize differences in dietary requirements for choline in women, because during pregnancy, maternal dietary choline modulates fetal brain development in rodent models. Because choline metabolism and folate metabolism intersect at the methylation of homocysteine, manipulations that limit folate availability also increase the use of choline as a methyl donor.
Having said that, an experiment on rats showed that high dose folic acid (without the needed accompanying methyl donors) during pregnancy caused insulin resistance in the offspring.
Journal of Endocrinology
Excess perigestational folic acid exposure induces metabolic dysfunction in post-natal life
The results of this work indicate that perigestational high folic acid exposure the affects long-term metabolic phenotype of the offspring, predisposing them to an insulin-resistant state.
J Nutr. 2010 Jun;140(6):1162-6. doi: 10.3945/jn.110.122044. Epub 2010 Apr 14.
Dietary choline reverses some, but not all, effects of folate deficiency on neurogenesis and apoptosis in fetal mouse brain
In mice, maternal dietary folate, a cofactor in 1-carbon metabolism, modulates neurogenesis and apoptosis in the fetal brain. Similarly, maternal dietary choline, an important methyl-donor, also influences these processes. Choline and folate are metabolically interrelated, and we determined whether choline supplementation could reverse the effects of folate deficiency on brain development
A study in humans showed that folate and B12 supplementation reversed metabolic syndrome, improving insulin sensitivity and lowering homocysteine
Eur J Endocrinol. 2004 Oct;151(4):483-9.
Insulin resistance and endothelial function are improved after folate and vitamin B12 therapy in patients with metabolic syndrome: relationship between homocysteine levels and hyperinsulinemia
Folate and vitamin B12 treatment improved insulin resistance and endothelial dysfunction, along with decreasing homocysteine levels, in patients with metabolic syndrome, suggesting that folic acid has several beneficial effects on cardiovascular disease risk factors
I think that the insulin sensitivity has been completely overlooked on this forum, along with blood cell synthesis. People take huge amounts on folate and B12 ignoring that it can cause hypoglycemia and acidosis, plus it will promote the recruitment of other B vitamins and minerals for blood cell synthesis. Additionally, the B vitamins and minerals which can be quickly depleted by an unbalanced supplementation are involved in hormonal and neurotransmitter balance.
A study has been posted by someone else before showing that unmetabolized folic acid can build up, blocking the use of active folate.
This causes or worsens B12 deficiency and insulin resistance, causing epigenetic changes and predisposing the offspring to IR and obesity.
© 2008 American Society for Clinical Nutrition
Is folic acid good for everyone?
In humans, increased folic acid intake leads to elevated blood concentrations of naturally occurring folates and of unmetabolized folic acid. High blood concentrations of folic acid may be related to decreased natural killer cell cytotoxicity, and high folate status may reduce the response to antifolate drugs used against malaria, rheumatoid arthritis, psoriasis, and cancer. In the elderly, a combination of high folate levels and low vitamin B-12 status may be associated with an increased risk of cognitive impairment and anemia and, in pregnant women, with an increased risk of insulin resistance and obesity in their children.
In my personal interpretation, excess of methylfolate intake can have the following adverse outcomes in regards to insulin resistance:
- first methyfolate can make one who doesn't have IR hypoglycemic, causing panick attacks, acidosis, mood swings etc
- secondly, excess methyfolate will build up and create/worsen insulin resistance, leading to a huge need for potassium (and B1, choline and magnesium).
I will be happy to discuss it.J Physiol Biochem. 2015 Dec 3. [Epub ahead of print]
The role of dietary potassium in hypertension and diabetes
...
Furthermore, accumulating epidemiological evidence from, especially, the last decade relates low dietary potassium intake or serum potassium levels to an increased risk for insulin resistance or diabetes.
...
PS to check for IR one needs the blood tests of fasting insulin, fasting glucose, insulinemic curve and HbA1c
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