The Low Oxalate Diet (LOD) was developed by the Vulvar Pain Foundation (VPF) to ameliorate the vulvar pain that was found by Dr. Clive Solomons to be linked to the presence of oxalates. Dr. Solomons discovered the role of oxalates in triggering pain, and the assumption was made that the major source of oxalates was dietary. Over time the VPF developed a diet low in oxalates that was designed to lower dietary oxalate intake, with the goal of reducing body stores of oxalates and therefore reducing pain. The VPF’s diet has recently been presented as a solution to some of the behavioral and health problems plaguing children with autism.
The LOD as presented by the VPF and the listserve Trying_Low_Oxalates (TLO) does not contemplate or advise the use of Vitamin K. Since the purpose of LOD is to lower dietary oxalates, it discourages the consumption of leafy greens which are high in oxalates but which are a main food source of Vitamin K1. LOD does encourage the use of citrate minerals, namely calcium citrate and magnesium citrate, because citrate seems to be able to chelate calcium from the CaOx salts in the body.
The Low Oxalate Diet developers do not appear to have examined the question of what happens to the calcium freed from the calcium oxalate salts. However, at least in the case of autistic children, it is probable that they have low levels of Vitamin K and therefore low levels of carboxylated bone proteins. Thus the children presumably have little ability to manage this freed calcium, which will circulate unimpeded into the nervous system and other organs and tissues. This influx of unmanaged calcium into circulation and then into the nervous system is, I believe, the reason that so many autistic children are exhibiting adverse responses to the LOD, including seizures, behavioral regression, hyperactivity, and depression. These symptoms do not indicate that oxalates have moved from storage into circulation for transport to the disposal sites (termed “oxalate dumping” on the TLO listserve), but rather reflect the deleterious effects of an influx of unmanaged calcium into the nervous system. Some of the autistic children on the LOD begin to experience heavy nosebleeds, which could reflect an exacerbation of an existing Vitamin K deficiency since on the LOD, Vitamin K-containing vegetables have been removed from the diet. The body’s first priority use of Vitamin K is manufacture, in the liver, coagulation factors that prevent bleeding and clotting disorders. If Vitamin K is withheld from the diet to the point where nosebleeds develop, then other, less apparent problems with clotting may be present also.