We saw positive results very fast. Our dog was so sluggish; he didn't come out of bed, no even for eating but after the third dose he came back to life: playful, energetic, happy. Thank you so much! We love your product.
My dog has a hypothyroid condition and takes thyroid supplements. In spite of these, the hair along his back and tail was very sparse. After a couple of weeks of Thyroid Boost, the hair over his shoulders has grown back, and is slowly re-growing along his back.