Seaweeds

Seaweeds are a diverse group of marine algae, including red, green, and brown varieties. They grow naturally in oceans and seas worldwide and are harvested for food. Processing typically involves washing, drying, and sometimes roasting or seasoning.

Seaweed is used as a food ingredient for its unique umami flavor and texture. It can act as a natural thickener, emulsifier, or stabilizer in various food products. It is commonly found in snacks, soups, noodles, and as a wrapper for sushi.

Seaweed is generally recognized as safe (GRAS) by the FDA for use in food. It is a source of various minerals, including iodine, which is essential for thyroid function. However, excessive iodine intake can also cause thyroid problems. JECFA has evaluated seaweed and its extracts. The WHO has noted that seaweed can be a source of naturally occurring heavy metals depending on where it is harvested.