In 1847, Henry Thayer M.D. opened a laboratory on Main Street in Cambridge, Massachusetts to produce his newly developed line of herbal extracts for sale to the medical profession. Since, our natural elixirs have been a fixture in medicine cabinets for generations. Once you use them, you'll know why. A longstanding commitment to making effective, natural remedies with high-quality ingredients has ensured Thayers' longevity. Its owners are confident that with this unwavering dedication, the company will flourish throughout the 21st Century.