fishboy9320
Senior Member
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From my research 7 vitamin/mineral blood tests are inaccurate.
1. Vitamin D
''Two new blood tests for vitamin D are inaccurate in at least 40 percent of laboratory specimens analyzed, a new study finds''
2. B12 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3827408/
3. Magnesium because only one percent is in the blood
4. Calcium because it is stored in the bones
5. Iron You need a fasting blood level to get an accurate serum iron.” Ferritin levels can be falsely raised when a patient is unwell The results of tests of iron status are relatively frequently distorted by other clinical factors. This is important to recognise as such distorted results may give a misleading view of the patient's iron stores. The impact of these factors can be recognised by combining the results of currently available tests.
6. Thiamine (vitamin b1) Whole blood thiamine testing is superior to currently available alternative tests for assessing thiamine status. Serum or plasma thiamine testing suffers from poor sensitivity and specificity, and less than 10% of blood thiamine is contained in plasma. Transketolase determination, once considered the most reliable means of assessing thiamine status, is now considered an inadequate method. The transketolase method is an indirect assessment. Since transketolase activity requires thiamin, decreased transketolase activity is presumed to be due to the decrease of thiamin. However, the test is somewhat nonspecific, as other factors may decrease transketolase activity. Transketolase is less sensitive than liquid chromatography-tandem mass spectrometry (LC-MS/MS), has poor precision, and specimen stability concerns.
7. Biotin in blood or other samples taken from patients who are ingesting high levels of biotin in dietary supplements can cause clinically significant incorrect lab test results. The FDA has seen an increase in the number of reported adverse events, including one death, related to biotin interference with lab tests.4 Nov 2019
Some amount of vitamin B7/biotin can also be synthesized by the bacteria living in the gut like k2. So if you are deficient your gut bacteria is gonna be making more b7 and it is gonna be sent directly into the blood since it isnt stored so itwill perhaps interfer with lab results?
(EDIT) Found one more. From SelfHacked website:
Limitations and Other Tests
´´Vitamin E is fat-soluble, meaning that lipids must carry it through the bloodstream. High blood lipids (as in older or obese people) increase the amount of vitamin E in the blood but also hinder its transport into other tissues [8, 9, 10].
That’s why blood levels of vitamin E don’t always correlate with its intake and may not provide a clear picture of its status in your body. Experts suggest the ratio of alpha-tocopherol to cholesterol (or total lipids) is a more accurate indicator of vitamin E status [11, 12]. ´´ So it includes all fat soluble vitamins, K and A too?
Vitamin b1, b2 b6 etc are stored in small amounts in the body. B12 is stored in high amounts. Vitamin c is stored in brain some way.
1. Vitamin D
''Two new blood tests for vitamin D are inaccurate in at least 40 percent of laboratory specimens analyzed, a new study finds''
2. B12 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3827408/
3. Magnesium because only one percent is in the blood
4. Calcium because it is stored in the bones
5. Iron You need a fasting blood level to get an accurate serum iron.” Ferritin levels can be falsely raised when a patient is unwell The results of tests of iron status are relatively frequently distorted by other clinical factors. This is important to recognise as such distorted results may give a misleading view of the patient's iron stores. The impact of these factors can be recognised by combining the results of currently available tests.
6. Thiamine (vitamin b1) Whole blood thiamine testing is superior to currently available alternative tests for assessing thiamine status. Serum or plasma thiamine testing suffers from poor sensitivity and specificity, and less than 10% of blood thiamine is contained in plasma. Transketolase determination, once considered the most reliable means of assessing thiamine status, is now considered an inadequate method. The transketolase method is an indirect assessment. Since transketolase activity requires thiamin, decreased transketolase activity is presumed to be due to the decrease of thiamin. However, the test is somewhat nonspecific, as other factors may decrease transketolase activity. Transketolase is less sensitive than liquid chromatography-tandem mass spectrometry (LC-MS/MS), has poor precision, and specimen stability concerns.
7. Biotin in blood or other samples taken from patients who are ingesting high levels of biotin in dietary supplements can cause clinically significant incorrect lab test results. The FDA has seen an increase in the number of reported adverse events, including one death, related to biotin interference with lab tests.4 Nov 2019
Some amount of vitamin B7/biotin can also be synthesized by the bacteria living in the gut like k2. So if you are deficient your gut bacteria is gonna be making more b7 and it is gonna be sent directly into the blood since it isnt stored so itwill perhaps interfer with lab results?
(EDIT) Found one more. From SelfHacked website:
Limitations and Other Tests
´´Vitamin E is fat-soluble, meaning that lipids must carry it through the bloodstream. High blood lipids (as in older or obese people) increase the amount of vitamin E in the blood but also hinder its transport into other tissues [8, 9, 10].
That’s why blood levels of vitamin E don’t always correlate with its intake and may not provide a clear picture of its status in your body. Experts suggest the ratio of alpha-tocopherol to cholesterol (or total lipids) is a more accurate indicator of vitamin E status [11, 12]. ´´ So it includes all fat soluble vitamins, K and A too?
Vitamin b1, b2 b6 etc are stored in small amounts in the body. B12 is stored in high amounts. Vitamin c is stored in brain some way.
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