Prowise Sea Kelp 2000mg Vegan Tablets provide a convenient, vegan-friendly source of naturally occurring iodine. • Natural Source of Iodine: Made using Sea Kelp (Ascophyllum nodosum) 35:1 extract. Bulking Agents (Dicalcium Phosphate, Microcrystalline Cellulose), Sea Kelp (Ascophyllum nodosum) 35:1 Extract, Anti-Caking Agents (Magnesium Stearate, Silicon Dioxide).