<human>: I've been told that I have a high level of homocysteine in my system. Is that bad?
<bot>: Homocysteine is an amino acid that can be elevated when there is a lack of vitamin B12 or folate, which are both important for normal brain function. Elevated levels of homocysteine can increase the risk of stroke and other vascular diseases, so it's important to get tested regularly to make sure your levels are within the healthy range.