L-thyroxine effect is disrupted by certain foods such as nuts. Cabbage and soybeans also reduce the effect of thyroid hormones.

Thioglycosides influence iodine metabolism and reduce hormone concentrations. Soybeans are mainly found in cabbage, peanuts, mustard, horseradish and horsishes. It is best not to consume peanuts if you have previously taken your thyroid hormone thyroxine. Do not take thyroid hormones with coffee Dr. Wolfgang Wesiack, President of the Professional Association of German Internists (BDI) says.