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Douglas Laboratories has been at the forefront of the nutritional health industry for over 50 years, engaging in the kind of top-notch product research and development that allows them to produce excellent science-based dietary supplements to help people improve their health. They offer one of the largest and most innovative selections of premium products as a healthcare practitioner brand and operate under a simple promise: provide the highest quality nutritional supplements available with the highest level of personal service—anywhere.
Vitamin C 1000 mg
High potency vitamin C in tablet form.
Douglas Laboratories' logo, text, trademarks, graphics, and photo images are the property of Douglas Laboratories, LLC and are used with permission. Copyright © 2026.
*FDA Disclaimer: The information about this product and statements made a...
Vitamin C 1000 mg
$19.50
$9.75
Vitamin D 125 mcg (5,000 IU)
Vitamin D contains 125 mcg (5,000 IU) of vitamin D3 per tablet.
Douglas Laboratories' logo, text, trademarks, graphics, and photo images are the property of Douglas Laboratories, LLC and are used with permission. Copyright © 2026.
*FDA Disclaimer: The information about this prod...
Vitamin D 125 mcg (5,000 IU)
$17.00
$8.50
Vitamin D 25 mcg (1,000 IU)
Vitamin D contains 25 mcg (1,000 IU) of natural vitamin D3 per tablet.
Douglas Laboratories' logo, text, trademarks, graphics, and photo images are the property of Douglas Laboratories, LLC and are used with permission. Copyright © 2026.
*FDA Disclaimer: The information about t...
Vitamin D 25 mcg (1,000 IU)
$9.50
$4.75
Vitamin K2
Vitamin K2 supplies a significant amount of biologically active vitamin K2 in the form of menaquinone-7 (MK-7). This product is soy-free and derived from plant-based geraniol and farnesol.
Douglas Laboratories' logo, text, trademarks, graphics, and photo images are the property o...
Vitamin K2
$39.00
$19.50
Zinc Lozenges
Zinc Lozenges supply a great-tasting zinc flavored with natural orange extracts. Each lozenge contains 10 mg of elemental zinc in the form of zinc citrate.
Douglas Laboratories' logo, text, trademarks, graphics, and photo images are the property of Douglas Laboratories, LLC and a...
Zinc Lozenges
$21.50
$10.75
Zinc Picolinate 50 mg
Zinc Picolinate capsules supply 50 mg of zinc from zinc picolinate complex.
Douglas Laboratories' logo, text, trademarks, graphics, and photo images are the property of Douglas Laboratories, LLC and are used with permission. Copyright © 2026.
*FDA Disclaimer: The information abo...
Zinc Picolinate 50 mg
$22.00
$11.00
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