Homocysteine and environmental exposures

The idea to explore

This chapter places environmental exposures alongside genetics, sulfur metabolism and inflammatory markers.

Follow the connections

Lead, mercury, arsenic and organophosphate exposure are discussed as possible influences on the pathways in the author’s model. The source connects these topics with glutathione and laboratory interpretation. Consider exposure history and the appropriateness of a test before assuming a pathway discussion identifies toxicity.

Exposure is a separate question from susceptibility

The chapter brings genetics and toxicants into one model, but they describe different things. Susceptibility is a possible tendency to respond differently; exposure is contact with a substance. A gene result does not establish that an exposure occurred. The source’s discussion of lead, mercury, arsenic and organophosphates therefore needs an exposure history and suitable testing before it can inform a real clinical question. A theoretical antioxidant connection is not proof of poisoning or proof that a detoxification product is needed.

A question for your next conversation

Is there an identifiable exposure, and is the proposed test appropriate for that substance?

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