Question: how much iodine in 1 tsp of kelp?
Answer: Kombu kelp can contain up to 2,984 mcg of iodine per seaweed sheet (1 gram). This provides almost 2,000% of the recommended daily intake (6). Excess iodine consumption is well-tolerated in the majority of people but could result in thyroid dysfunction for those who are susceptible ( 7 ).