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So my doc just called me today and told me that my blood tested low in COQ10...and Vitamin B 12. The tests were taken before I switched to a vegan diet (about 3 weeks ago).

Any idea in what could be causing the two deficiencies? Or does anyone have any other info about COQ10? I'm clueless about it...


Do you eat a lot of soy now? Soy is an excellent source of CoQ10.

If you cut meat from your diet and don't substitute with soy, that can lead to a deficiency.

I don't recommend supplementing CoQ10 if you don't need it. I began taking it once just because my family has a history of heart disease. As soon as I started taking it I started getting heart palpitations so I stopped.

I eat lots of soy and olive oil so I think I'm good.



I can't eat soy, but there's other good sources of it:

It is in peanuts, walnuts, sesame seeds, pistachios, hazelnuts, almonds, broccoli, cauliflower, oranges, strawberries, spinach, and we can synthesize it too:

The human liver manufactures adequate amounts to fulfill the need not met in the diet. Some whole food nutritionists may believe that people who are deficient  in B vitamins, selenium, vitamin C, or vitamin E may not be able to make as much coenzyme Q10 as they need since all these nutrients  are required in order to produce it.

Here's what the possible causes of low COQ10 might be:

Coenzyme Q10 is normally produced by the human body, although deficiency may occur in patients with impaired CoQ10 biosynthesis due to severe metabolic or mitochondrial disorders, not enough dietary CoQ10 intake, or too much CoQ10 use by the body. Depending on the cause of CoQ10 deficiency, supplementation or increased dietary intake of CoQ10 and the vitamins and minerals needed to produce CoQ10 may be effective.


Here's some more on COQ10 deficiency:

No coenzyme Q10 deficiency symptoms have been reported in the general population, so it is generally assumed that normal biosynthesis and a varied diet provides sufficient coenzyme Q10 for healthy individuals (7).

Decreased plasma levels of coenzyme Q10 have been observed in individuals with diabetes, cancer, and  congestive heart failure (see  Disease Treatment).  Lipid lowering medications that inhibit the activity of HMG-CoA reductase, a critical enzyme in both cholesterol  and coenzyme Q10 biosynthesis, decrease plasma coenzyme Q10 levels (see HMG-CoA reductased inhibitors (statins) under Drug Interactions), although it remains unclear whether this has clinical or symptomatic implications.

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