Kelp, or Ascophyllum nodosum, is a greenish-brown seaweed found on sea and ocean coasts around the world, from Ireland to Japan to Canada. The use of kelp powder has been shown to be particularly effective in people with iodine deficiency, which can manifest itself as obesity or chronic fatigue. 

Kelp replenishes iodine and supports energy metabolism and induces a feeling of satiety. As a result, it contributes to weight loss.