Postmenopausal women who eat seaweed often are at risk for thyroid cancer.
This conclusion has been the Center for Cancer and Environmental Research Institute of Japan came after tracking nearly 53,000 Japanese women aged 40-69 years in 14 years.
Accordingly, women who eat seaweed every day are at risk for thyroid cancer 1.7 times higher than those who eat seaweed up to 2 times / week and about 3.8 times higher than those limit eating these foods.
The study, which was published in the journal Journal of Cancer Prevention, did not specify how often to eat seaweed increases the risk of thyroid cancer in women after menopause, but found no correlation to the amount of i-iodine in seaweed.
The researchers found that Japanese women eat seaweed regularly or too many, represents around 80% of their iodine intake, the risk of thyroid cancer.
However, researchers did not specify the amount of seaweed which the participants had eaten in the above study.