Synthroid is one of the most widely prescribed pharmaceutical brand names for Levothyroxine Sodium; synthetic T4, the storage and transport form of thyroid hormone. This formulation delivers 100mcg per tablet in a 90 count format, the same compound and concentration as CSD’s Thyronorm listings, with the Synthroid brand name and 90 tablet pack size representing the differentiating variables.

Synthroid’s brand recognition reflects its position as the most commonly referenced thyroid hormone replacement medication in North American clinical practice. Its pharmacology remains identical to other Levothyroxine formulations, requiring peripheral conversion to active T3 by deiodinase enzymes, a gradual onset and longer half-life of approximately 7 days compared to direct T3 formulations, and the same fundamental consideration that it is hormone replacement medication intended for diagnosed hypothyroidism rather than a weight loss tool for individuals with normal thyroid function.

Every batch of CSD’s Synthroid is third party lab tested for concentration accuracy and purity before being made available, with COA documentation available on request. CSD stocks Levothyroxine across Thyronorm and Synthroid brand presentations for complete brand and pack size flexibility. All orders ship discreetly across Canada in plain, unmarked packaging with no identifying information on the exterior.

Levothyroxine is a prescription thyroid hormone medication that should only be used to treat a diagnosed thyroid condition under medical supervision, with regular blood testing to monitor thyroid hormone levels. Using thyroid hormone without a diagnosed deficiency is not a safe or effective approach to weight management and carries genuine cardiac and bone health risks.

Store in a cool, dry place away from direct light and heat.