Normal Bonsoy consumption can lead to hyperthyroidism (I haven’t seen any cases of hypothyroidism) due to excess iodine (i.e. excess iodine can cause hyperthyroidism). The links between excess iodine consumption and hyperthyroidism are well known and proven.

There are also links between hyperthyroidism and miscarriage and complications with pregnancy in general. Read more here and here.

Hyperthyroidism can result in the following symptoms. You can read about hyperthyroidism here (Wiki), here (Victorian Gov’t Better Healthy), here (Endocrine Website), here (Vitamins site), here (about.com) and here (Merck pharma site). I wrote about how it affected me here.

• Rapid heart rate
• Severe heart palpitations that can last for several hours (can end in hospitalisation)
• Tremors and a general ’speedy’ feeling
• Constant tiredness
• Continued hunger despite food intake
• Loss in weight
• The need to cut food from your diet to keep heart rate down (alcohol, caffeine, chocolate)
• The muscles in my arms and torso became weak and wasted
• Feeling slower and needing much more effort during exercise
• Dry skin and hair
• Headaches
• Joint aches
• Late and occasionally missed periods
• Drop in libido
• Gauntness (particularly in face)
• Eyes popping out (a good indicator)

If you have any of these symptoms, and have been consuming Bonsoy, you should immediately see a doctor for a Thryoid Function Test (TFT) and explain why you are asking for it.