Fucus vesiculosis, also called Bladderwrack or kelp, is a sea vegetable which is a prime source of iodine - crucial in preventing thyroid problems. It has been used medicinally for thousands of years, especially in Traditional Chinese Medicine. Apart from its beneficial effect on thyroid functioning, it is also used as a metabolic stimulant and can be found in many slimming remedies. When using kelp medicinally, always make sure that it is sourced by a reputable and trusted company. Kelp harvested from the beach or near to the coast may be contaminated with industrial waste, sewerage, lead, mercury or other toxins. Kelp used in Native Remedies Thyroid Assist has been harvested only from uncontaminated areas and screened for the presence of toxins, heavy metal sand contamination.

Avena sativa is derived from the wild oat plant and is a well known restorative and nerve tonic, used to treat depression, low libido and lack of energy, as well as hypothyroidism. More recently it has also been shown to be effective in reducing high cholesterol levels.