In searching further, I finally found the answer I was looking for. I was low in B12 and supposedly folate, but my homocysteine levels were low, with methylmalonate being high.
Methylmalonate
This compound is converted into succinic acid using a vitamin B12-dependent enzyme, methylmalonyl CoA mutase (Fig 1). The lack of vitamin B12 impairs this conversion as well as the one in which methionine is recovered from homocysteine, leading to accumulation of methylmalonate. As discussed above, high levels indicate a functional deficiency of vitamin B12. A differential diagnosis can be made when considering both methylmalonate and the amino acid, homocysteine. If homocysteine is also elevated, both B12 and folate functional deficiencies are indicated. If only homocysteine is high, folate and B6 supplementation are suggested. If methylmalonate only is elevated, only B12 supplementation is needed [25].
Here's another area I had a problem with on my Metabolic Analysis, just for the record. I was low in Homovanillic acid and Vanilmandelic acid.
Vanilmandelate (VMA)
Homovanillate (HVA)
These two compounds are metabolites of catecholamines, epinephrine and norepinephrine. Low urinary levels have been associated with low CNS levels of these neurotransmitters. Symptoms associated with this condition are depression, sleep disturbances, inability to deal with stress, and fatigue. Treatments aimed at improving protein digestion and supplementation of the amino acid precursors can normalize neurotransmitter levels in the CNS [28]. A further indication of need for these precursors is low fumarate, a metabolic intermediate that can also be derived from tyrosine and phenylalanine.
And then there's the problem with Candida, and I'll post this in the conf. room for future reference, as well. I was medium high on this, but maybe I'm beginning to get it under control through diet.
Arabinose and Arabinitol
Arabinose is a carbohydrate and arabinitol is the related sugar-alcohol which is a product specifically of anaerobic fungal growth in the gut. The D isomer of arabinitol is produced by fungal metabolism and is urinary excretion is elevated in patients with invasive candidiasis [36,37].
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Richard