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.