This explanation is for those of you that must take thyroid medication prescribed by your doctor. You will note that there are often labels attached to your prescription bottle asking you to avoid taking your medication with calcium products or soy products. The main reason it is recommended to separate your medication ingestion with time is due to medication absorption. Clinical research has found that levothyroxine activity will be better absorbed if it is taken in the morning and calcium taken at least four hours later.
Soy products are better consumed more than three hours after taking thyroid medication. This includes products with soybean oil, energy bars with soy protein, power packed protein drinks that use soy as their protein source and any other soy based products. Reading food labels becomes so important to get the most out of taking this medication.
Caffeine products such as a cup of coffee or an energy drink with caffeine also have been shown to interfere with thyroid medication absorption. It is more difficult to take this medication to get the proper dose absorption than you might think. It takes planning and diligence to get the medication dosage taken in the morning before breakfast. One doctor actually suggested that if I woke up in the middle of the night or early in the morning, that I might want to keep the medication on my nightstand with water so I could take it then and avoid the absorption problems. I have chosen to be very careful with what I eat for breakfast, and wait until lunch for a cup of coffee or a glass of milk.
Let me know how you have solved this challenge when taking thyroid medication.