Best Sellers

Douglas Labs manufactures dietary supplements scientifically formulated to help support enhanced energy levels and muscle function to help you reach your fitness goals. Choose from products that support the adrenal and thyroid glands and promote physical and mental endurance.



Learn more about Douglas Laboratories® Best Sellers and Unique Formulations

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  1. Methyl B12 Plus
    Methyl B12 Plus
    Methylcobalamin B12 plus folate as L-methylfolate flavored lozenges
  2. Methyl Folate
    Methyl Folate
    Folate as L-methylfolate, Metafolin® 1,000 mcg
  3. Multi-Probiotic 40 Billion
    Multi-Probiotic 40 Billion
    Gastrointestinal and immune health
  4. Niacinamide 500 mg
    Niacinamide 500 mg
    500 mg Niacinamin capsule
  5. Pregnenolone (25 mg)
    Pregnenolone (25 mg)
    Hormone support
  6. QÜELL® Fish Oil - EPA/DHA Plus D
    QÜELL® Fish Oil - EPA/DHA Plus D
    Daily wellness, cardiovascular and immune health
  7. Ultra Preventive® X
    Ultra Preventive® X (Tablets)
    Signature multivitamin/mineral with fruits and vegetables for daily wellness
  8. Vitamin C 100 count
    Vitamin C 1,000 mg
    Vitamin C, provided by Douglas Laboratories®, contains 1,000 mg of vitamin C as L-ascorbic acid per tablet.
  9. Vitamin D (1
    Vitamin D 25 mcg (1,000 IU)
    1,000 IU Vitamin D-3 tablets
  10. Vitamin K2
    Vitamin K2
    Support for healthy bone formation and blood vessels
  11. Zinc Lozenges
    Zinc Lozenges
    Support for immune function and emotional wellness
  12. Zinc Picolinate (Capsules)
    Zinc Picolinate (Capsules)
    Zinc picolinate 50 mg
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