That link didn't work. Could you repost? I'd be very interested in reading the study.
Also, do you know at what level elevated HCY causes those increased risks? In other words, I'd love to also know if the increased levels observed in the study are clinically significant. I don't know if you have a separate study that discusses that, but I would also be very interested in that if you do.
Thanks!!
Here's the title of the study:
Homocysteine, folic acid and vitamin B12 levels in serum of epileptic children
and the link
http://www.sciencedirect.com/science/article/pii/S1110863012000560
I was also interested in how high the HCY levels had to be to cause issues in children. The normal levels in children of elementary age are lower than teens and adults. I did research and found that 5.2 (boys) and 5.3 (girls) is the mean level for children between ages 6 to 11 in the U.S. and that levels of 6.5 (boys) and 6.7 (girls) put then in the "90%" on the chart, which I suppose would be the high end of "normal", so perhaps numbers over 7 would be considered high?
http://jn.nutrition.org/content/133/8/2643/T1.expansion.html
Apparently, children on AEDs are not routinely tested for HCY levels. My son (age 11) has been on AEDs for 10 years, and I don't think he's ever been tested. So, even though it's common knowledge in the medical world that high HCY levels are associated with heart and vascular disease, diabetes, and neurological effects -- I haven't found many studies out there on the effects of high HCY levels on children (and how high is too high).
The study had a chart showing the length of time children were on AEDs and the effect on HCY levels. There was a steady climb, each year on AEDs, reaching an average of an HCY level of 8 or 9 after 12 to 14 years on seizure meds. The chart just below that showed a steady decrease in folic acid levels for children for each year they were on AEDs. A 3rd chart just below that one (which I found a bit hard to interpret) indicated that the higher the HCY levels, the lower the folic acid levels. And they also said that, surprisingly, the B12 levels were high in kids with high HCY levels. They theorized that long term use of AEDs had damaged the liver to the point where it was unable to store the B12 (so it was circulating in the blood, but apparently not being used??)
Here's another link on HCY levels in children taking AEDs
http://www.ncbi.nlm.nih.gov/pubmed/24799812
Folic acid supplementation on homocysteine levels in children taking antiepileptic drugs: A randomized controlled trial.
This study found increased homocysteine levels in autistic children, but the abstract didn't say how high the HCY was in kids with severe language delay --
The increase in homocysteine concentration was significantly and directly correlated with the severity of the deficit in communication skills
http://www.ncbi.nlm.nih.gov/pubmed/26070768
Here's another study on AEDs and HCY levels in children:
http://www.psigen.cat/pdfs/Articles cientifics/23 EJPN 2000.pdf
It says that HCY levels were significantly increased in children on AEDs, and folate and B6 levels significantly decreased. Once again, the longer on AEDs, the higher the HCY levels. The higher the HCY, the lower the folate and vitamin B6 and B12 levels, especially in children with the MTHFR gene mutation (this mutation that affects about 10% of the population is more common in individuals with epilepsy, and also with migraines and autism)