Seaweed Iodine Delivered Via Food or Supplementation

Inclusion Criteria: * self-reported healthy women * aged 18 to 60 * pre-menopausal * with no history of thyroid dysfunction * without any known allergic reactions to foods * not on medication that impact on absorption of nutrients from the gut * not currently taking dietary / multivitamin supplements (must have discontinued usage 2 weeks prior the start of the study) Exclusion Criteria: * pregnancy * lactation * habitual consumption of seaweed-based products (\>once per week), milk (\>once per day), sea fish, non-oily, e.g. cod (\>once per week) * veganism (as food products contains cheese) * Involvement in another research study where diet is restricted, modified, or dietary habits are studied. * women who have reached menopause.