Differences between Thyroid-S, Thiroyd and T.R.

Thyroid-S from Sriprasit Pharma Co., Ltd. in Thailand (sister company of Sriprasit Dispensary R.O.P.), which is a leading importer of pharmaceutical products, and has been a GMP and ISO 9002-certified manufacturer of pharmaceutical products. Thyroid-s is gluten-free. Tablets are light brown, round, coated. The ingredients, according to Pongsak Songpaisan of Sriprasit are:


  • Thyroid extract USP
  • Lactose (a milk sugar and is a filler)
  • PVP K90 (Polyvinylpyrolidone; water soluble coating/binder; no known hazard)
  • Avicel (microcrystalline cellulose; holds product together)
  • Aerosil (silicic acid powder; help disperse the ingredients)
  • Sodium starch glycolate (helps dissolute/disintegrate the pill)
  • Magnesium stearate (filling agent)
  • Eudragit (a common sustain-released coating)
  • Methocel (a water soluble cellulose — helps bind pill)
  • Talcum (a filler)
  • Ponceau 4r lake (red additive-aluminum)
  • Tartrazine lake (yellow additive-aluminum)
  • Brilliant blue FCF lake (blue additive-aluminum)
  • Sunset yellow FCF (yellow additive)
  • Titanium dioxide (white)
  • PEG 6000 (water soluble polymer; binder)
  • Dimethicone solution 

Thiroyd is from Greater Pharma Ltd., which is also a leading Thai Pharmaceutical Manufacturer. The grains do dissolve very well sublingually. Potential fillers are Lactose, Tapioca Starch, Sodium Starch Glycolate, PVP K-30, PVP K-90, Isopropyl Alcohol, Colloidal Silicon Dioxide, Magnesium Stearate.


T.R. by Tman Pharma is sugar-coated tablet. T.R. stated that their desiccated thyroid extracts are gluten and lactose free. The product lifetime of T.R. is four years from date of manufacture.