Douglas Laboratories

  • Highest sourcing standards for exceptional purity, free from contamination, best absorbability
  • GMP-compliant manufacturing facility; third-party, NSF International registered and inspected for good manufacturing practices
  • An approved producer of NSF certified-for-sport products with an ISO-accredited internal quality laboratory
  • Research-based ingredients to create safe, effective nutritional products for our doctors and health-conscious consumers.
  • Third party laboratory testing to ensure purity and potency

Best Douglas Laboratories Supplements

#1 Real Supplements Rated Best in 2020
Douglas Laboratories Multi-Probiotic 40 Billion | Provides Probiotics and Prebiotics to Support Gut Microflora and Immunity* | 60 Vegetarian Acid-Resistant Capsules
256 Reviews
Douglas Laboratories Multi-Probiotic 40 Billion | Provides Probiotics and Prebiotics to Support Gut Microflora and Immunity* | 60 Vegetarian Acid-Resistant Capsules
  • Immune Health: Offers a synbiotic blend of 16 strains that help to support immune health by balancing intestinal microflora.*
  • Shelf Stable: This formula is shelf stable and does not require refrigeration to maintain culture viability.
  • Digestive: Our digestive formulas are developed to support G.I. health and its highly complex ecosystem.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential for healthy living, today and in the future.*
#2 Real Supplements Rated Best in 2020
Douglas Laboratories B-Complex with Metafolin - Comprehensive B Vitamin Supplement - Energy & Brain Health Support* - with Folate, Biotin & Thiamin - Non-GMO - 60 Vegetarian Capsules
73 Reviews
Douglas Laboratories B-Complex with Metafolin - Comprehensive B Vitamin Supplement - Energy & Brain Health Support* - with Folate, Biotin & Thiamin - Non-GMO - 60 Vegetarian Capsules
  • Bone Health: Each K2 D3 vitamin capsule contains 2500 IU of vitamin D3 and 180 mcg of vitamin K2 (MK-7) to support heart health and bone health*
  • Vascular Benefits: A synergistic blend that aids healthy blood vessel function and calcium balance within the vascular system as well as immune support*
  • Immune Support: K2-D3 with Astaxanthin aids in maintaining a healthy immune system and supports overall wellness, thanks to synergistic ingredients*
  • Antioxidant Power: Includes 2 mg of astaxanthin, a potent antioxidant that supports vascular health alongside the benefits of vitamin D3*
  • Healthier Living for Your Patients: Douglas Laboratories provides high quality, science-based nutritional supplements to support your patients' healthy lifestyles
#3 Real Supplements Rated Best in 2020
Douglas Laboratories Magnesium Glycinate | Supports Normal Heart Function and Bone Formation | 240 Capsules
84 Reviews
Douglas Laboratories Magnesium Glycinate | Supports Normal Heart Function and Bone Formation | 240 Capsules
  • Heart & Bone Health: Magnesium, one of most important minerals, plays an essential role in maintaining normal heart function, muscle, and bone strength.*
  • Heart Health: Supports already normal heart function.*
  • Vitamins/Minerals/Amino Acids: Our vitamins/minerals and amino acid formulas are developed to provide beneficial support in filling nutrient gaps.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential to live healthier, today and in the future.*
#4 Real Supplements Rated Best in 2020
Douglas Laboratories K2-D3 with Astaxanthin - Antioxidant Support for Bones, Immune Function & Vascular Health* - with Menaquinone-7 & D Vitamin - 30 Vegetarian Capsules
117 Reviews
Douglas Laboratories K2-D3 with Astaxanthin - Antioxidant Support for Bones, Immune Function & Vascular Health* - with Menaquinone-7 & D Vitamin - 30 Vegetarian Capsules
  • Joint Health Support: Wobenzym PS provides healthy joint function and mobility, acting as a systemic supplement for added immune support*
  • Professional Systemic Enzymes: Contains the authentic German Phlogenzym formula used by health professionals in Europe, maintaining healthy joints, mobility, and flexibility*
  • Enzyme Blend: Contains bromelain, trypsin, and rutin for systemic enzyme support, supporting the body's normal healing capabilities as well as maintaining muscle and tendon structure*
  • Enteric Coated Tablets: Ensures enzymes for digestion reach the small intestine for optimal absorption, fostering overall immune support*
  • Healthier Living for Your Patients: Douglas Laboratories provides high quality, science-based nutritional supplements to support your patients' healthy lifestyles
#5 Real Supplements Rated Best in 2020
Douglas Laboratories Ultra Preventive X - Multivitamin Mineral Formula with Fruits & Vegetables - with Bioflavonoids, N Acetyl L Cysteine & Quercetin - Non-GMO - 240 Tablets
67 Reviews
Douglas Laboratories Ultra Preventive X - Multivitamin Mineral Formula with Fruits & Vegetables - with Bioflavonoids, N Acetyl L Cysteine & Quercetin - Non-GMO - 240 Tablets
  • Bioactive L-Methylfolate: This L-methylfolate supplement delivers 1,000 mcg of Metafolin, the natural form of folate (5-MTHF) for optimal absorption and fetal development*
  • Essential Vitamin B: Our L-methylfolate formula supports multiple bodily functions, including homocysteine metabolism, and crosses the blood-brain barrier*
  • Comprehensive Nutrition: Vitamin B folate aids in filling dietary gaps with a superior, patented form
  • Quality Assured Supplement: Produced with strict GMP standards, non-GMO, for trusted purity in our l-methyl folate/ vitamin B supplement
  • Healthier Living for Your Patients: Douglas Laboratories provides high quality, science-based nutritional supplements to support your patients' healthy lifestyles
#6 Real Supplements Rated Best in 2020
Douglas Laboratories Ultra Preventive X | Multivitamin Mineral Formula with Fruits and Vegetables for Daily Wellness | 120 Tablets
74 Reviews
Douglas Laboratories Ultra Preventive X | Multivitamin Mineral Formula with Fruits and Vegetables for Daily Wellness | 120 Tablets
  • Improved Formula: Contains new and improved ingredients, including vitamin K2 for bone and vascular health, bioflavonoids from quercetin, and alpha-lipoic acid for a healthy metabolism.*
  • Bioavailability: In addition, Ultra Preventive X now contains an organic phytonutrient blend with polyphenols, increased choline content for methylation and liver support, increased lutein and zeaxanthin for vision health, three types of vitamin B12, and improved mineral forms for bioavailability.*
  • Foundation: supplement formulated to support the unique biochemical and metabolic needs of each individual.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential to live healthier, today and in the future.*
#7 Real Supplements Rated Best in 2020
Douglas Laboratories Ultra Preventive 1 Daily | Multivitamin and Mineral Supplement to Support Energy Production, Immune Function, and Overall Health* | 60 Capsules
10 Reviews
Douglas Laboratories Ultra Preventive 1 Daily | Multivitamin and Mineral Supplement to Support Energy Production, Immune Function, and Overall Health* | 60 Capsules
  • Essential Vitamins And Minerals: Nutrients such as beta-carotene, vitamin D, and B-complex vitamins are included in high-potency amounts because of the roles they play in antioxidant protection, energy production, the maintenance of healthy blood cells, immune and gastrointestinal function, the nervous system, hormonal balance, and more.*
  • Unique Formula: Astaxanthin is included as a carotenoid antioxidant to support overall health.*
  • Foundation: Dietary supplement formulated to support the unique biochemical and metabolic needs of each individual.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential to live healthier, today and in the future.*
#8 Real Supplements Rated Best in 2020
Douglas Laboratories Ultra Preventive 2 Daily | Multivitamin and Mineral Supplement to Support Energy Production, Immune Function, and Overall Health* | 60 Tablets
9 Reviews
Douglas Laboratories Ultra Preventive 2 Daily | Multivitamin and Mineral Supplement to Support Energy Production, Immune Function, and Overall Health* | 60 Tablets
  • Essential Vitamins And Minerals: Nutrients such as beta-carotene, vitamin D, and B-complex vitamins are included in high-potency amounts because of the roles they play in antioxidant protection, energy production, immune and gastrointestinal function, the nervous system, hormonal balance, and more.*
  • Healthy Aging: Astaxanthin is included as a carotenoid antioxidant to support healthy aging.*
  • Foundation: supplement formulated to support the unique biochemical and metabolic needs of each individual.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential for healthy living, today and in the future.*
#9 Real Supplements Rated Best in 2020
Douglas Laboratories - Methyl B12 Plus - Supports Blood Cell Production, Nervous System, and Metabolism - 90 Lozenges
465 Reviews
Douglas Laboratories - Methyl B12 Plus - Supports Blood Cell Production, Nervous System, and Metabolism - 90 Lozenges
  • Energy Support: As coenzymes, the B vitamins play an important role in proper energy production, including the metabolism of lipids, carbohydrates, and proteins.*
  • Unique B Vitamins: Methylfolate and methylcobalamin are the predominant forms of B vitamins commonly found in cells that do not require additional conversion in the body.
  • Vitamins/Minerals/Amino Acids: Dietary supplement formulated to provide beneficial support in filling important nutrient gaps.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential to live healthier, today and in the future.*
#10 Real Supplements Rated Best in 2020
Douglas Laboratories DHEA 50 mg Capsules - Micronized - Supports Hormone Balance, Immunity, Brain, Bone Health & Metabolism* - Non-GMO - 100 Vegetarian Capsules
524 Reviews
Douglas Laboratories DHEA 50 mg Capsules - Micronized - Supports Hormone Balance, Immunity, Brain, Bone Health & Metabolism* - Non-GMO - 100 Vegetarian Capsules
  • Optimal Muscle Support: Each Magnesium Citrate capsule delivers 150 mg of bioavailable magnesium citrate, a vital component for muscle health and cellular functions*
  • Heart Health Ally: Magnesium citrate plays a key role in supporting normal heart function*
  • Bone Formation Aid: Magnesium citrate is an essential mineral for bone health and resorption*
  • Gentle on Digestion: Bioavailable magnesium citrate comes in convenient, easy-to-digest vegetarian capsules*
  • Healthier Living for Your Patients: Douglas Laboratories provides high quality, science-based nutritional supplements to support your patients' healthy lifestyles
#11 Real Supplements Rated Best in 2020
Douglas Laboratories Vitamin D (5,000 I.U.) | Vitamin D3 Supplement to Support Immune Health, Calcium Levels, and Bones* | 100 Tablets
1,499 Reviews
Douglas Laboratories Vitamin D (5,000 I.U.) | Vitamin D3 Supplement to Support Immune Health, Calcium Levels, and Bones* | 100 Tablets
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations; All of our products are GMO-free
  • Vitamin D Source: Also known as the "sunshine vitamin", vitamin D has many roles in the body, including proper modulation of cell growth, neuromuscular and immune function health, ensuring normal calcium absorption and maintenance of healthy plasma calcium levels
  • Vitamins/Minerals/Amino Acids: Our vitamins/minerals and amino acid formulas are developed to provide beneficial support in filling nutrient gaps
  • Vitamin D Source: Also known as the "sunshine vitamin", vitamin D has many roles in the body, including proper modulation of cell growth, neuromuscular and immune function health, ensuring normal calcium absorption and maintenance of healthy plasma calcium levels;*
#12 Real Supplements Rated Best in 2020
Douglas Laboratories Berberine Balance | 60 Capsules
287 Reviews
Douglas Laboratories Berberine Balance | 60 Capsules
  • Supplement formulated to play an intimate role in supporting optimal cardiometabolic health.*
  • Grape seed extract, a well-known antioxidant.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential for healthy living, today and in the future.*
#13 Real Supplements Rated Best in 2020
Douglas Laboratories Ultra HNS (Hair, Nails, Skin) | Keratin, Biotin, and Nutrients to Support Hair, Nail, and Skin Health* | 90 Capsules
83 Reviews
Douglas Laboratories Ultra HNS (Hair, Nails, Skin) | Keratin, Biotin, and Nutrients to Support Hair, Nail, and Skin Health* | 90 Capsules
  • Hair, Nail, & Skin Health: After 90 days, individuals who supplemented with Cynatine HNS had improved nail hardness, resistance, and smoothness, resulting in fewer broken nails.*
  • Source Of Zinc: Zinc supports the regulation of healthy hair growth, immune system function, and plays an important role in skin barrier function against oxidative stress.*
  • Beauty By DL: Outward appearance including hair, skin, and nails, is a reflection of our internal health. Supplementation with clinically studied nutrients can help support beauty from within.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential for healthy living, today and in the future.*
#14 Real Supplements Rated Best in 2020
Douglas Laboratories Methyl Folate L-5-MTHF - 1,000 mcg Metafolin - Vitamin B Folate - Supports Homocysteine Metabolism & Fetal Development* - Non-GMO - 60 Tablets
489 Reviews
Douglas Laboratories Methyl Folate L-5-MTHF - 1,000 mcg Metafolin - Vitamin B Folate - Supports Homocysteine Metabolism & Fetal Development* - Non-GMO - 60 Tablets
  • Potent Zinc Source: Each capsule of Zinc Picolinate provides 50 mg of highly absorbable zinc picolinate, a great addition to your mineral supplement routine*
  • Immune System Support: Fortify your body’s defense mechanism with our zinc supplement, a key mineral for antioxidant activity*
  • Antioxidant Properties: Our zinc aids in supporting antioxidant activity within the body, making it a vital mineral supplement*
  • Purity & Quality: GMO-free capsules manufactured in state-of-the-art facilities, designed to deliver quality zinc and antioxidant support
  • Healthier Living for Your Patients: Douglas Laboratories provides high quality, science-based nutritional supplements to support your patients' healthy lifestyles
#15 Real Supplements Rated Best in 2020
Douglas Laboratories C-1000 | 100% Pure Vitamin C to Support Skin, Blood Vessels, Tendons, Joint Cartilage and Bone | 100 Capsules
75 Reviews
Douglas Laboratories C-1000 | 100% Pure Vitamin C to Support Skin, Blood Vessels, Tendons, Joint Cartilage and Bone | 100 Capsules
  • Antioxidant Support: Vitamin C is among the most powerful antioxidants in humans and animals and promotes normal wound healing and capillary health.*
  • Skin & Joint Health: Vitamin C is essential for the synthesis of collagen, which is the building material of all connective tissues, such as skin, blood vessels, tendons, joint cartilage and bone.*
  • Vitamins/Minerals/Amino Acids: Our vitamins/minerals and amino acid formulas are developed to provide beneficial support in filling nutrient gaps.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential for healthy living, today and in the future.*
#16 Real Supplements Rated Best in 2020
Douglas Laboratories Melatonin 3 mg | Supports Sleep/Wake Cycles | 60 Capsules
53 Reviews
Douglas Laboratories Melatonin 3 mg | Supports Sleep/Wake Cycles | 60 Capsules
  • Sleep Support: Regulates normal sleep/wake cycles and supports normal immune function.*
  • Sleep & Relaxation: Our sleep & relaxation formulas are developed to support the management of cortisol, hormones, neurotransmitters and relaxation to optimize health.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential for healthy living, today and in the future.*
#17 Real Supplements Rated Best in 2020
Douglas Laboratories Amino-Mag 200 | Magnesium Supplement to Support Normal Heart Function, Bone Formation, and Muscles* | 100 Tablets
12 Reviews
Douglas Laboratories Amino-Mag 200 | Magnesium Supplement to Support Normal Heart Function, Bone Formation, and Muscles* | 100 Tablets
  • Muscle & Bone Health: Magnesium, one of most important minerals, plays an essential role in supporting normal heart function, muscle, skeletal, and bone strength.
  • Cardiovascular Function: Amino-Mag 200 is an amino acid magnesium chelate that is involved in supporting already normal heart function and blood pressure.*
  • Vitamins/Minerals/Amino Acids: supplement formulated to provide beneficial support in filling nutritional gaps.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential for healthy living, today and in the future.*
#18 Real Supplements Rated Best in 2020
Douglas Laboratories Magnesium Citrate - 150 mg - for Heart Function, Bone Health & Muscles - Gentle on Digestion* - 90 Vegetarian Capsules
239 Reviews
Douglas Laboratories Magnesium Citrate - 150 mg - for Heart Function, Bone Health & Muscles - Gentle on Digestion* - 90 Vegetarian Capsules
  • Comprehensive Multivitamin: Ultra Preventative X offers a wide spectrum of vitamins, including and pantothenic acid and vitamin B6; minerals; antioxidants; and n acetyl l cysteine for daily wellness*
  • Fruit & Vegetable Blend Supplement: Includes polyphenols, bioflavonoids, carotenoids derived from fruits and vegetables as well as organic fruit and vegetable powder*
  • Advanced Methylation Support: Features bioavailable vitamin forms, L-methylfolate, and choline - in addition to enhanced mineral forms - for superior absorption and methylation*
  • Advanced Formula: Contains Metafolin folate, vitamin D3, and vitamin B6 for optimal health benefits and methylation support*
  • Healthier Living for Your Patients: Douglas Laboratories provides high quality, science-based nutritional supplements to support your patients' healthy lifestyles
#19 Real Supplements Rated Best in 2020
Douglas Laboratories Vitamin C | Water-Soluble Antioxidant Supplement to Support Immune Function and Normal Wound Healing* | 100 Tablets
223 Reviews
Douglas Laboratories Vitamin C | Water-Soluble Antioxidant Supplement to Support Immune Function and Normal Wound Healing* | 100 Tablets
  • Antioxidant Support: Vitamin C is a water-soluble antioxidant in humans and animals, supporting protection from damage.*
  • Skin & Joint Health: Vitamin C is essential for the synthesis of collagen, which is the building material of all connective tissues, such as skin, blood vessels, tendons, joint cartilage, and bone.*
  • Vitamins/Minerals/Amino Acids: supplement formulated to provide beneficial support in filling nutritional gaps.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential for healthy living, today and in the future.*
#20 Real Supplements Rated Best in 2020
Douglas Laboratories Magnesium Oxide | Supports Normal Heart Function and Bone Formation* | 250 Capsules
679 Reviews
Douglas Laboratories Magnesium Oxide | Supports Normal Heart Function and Bone Formation* | 250 Capsules
  • Heart & Bone Health: Magnesium, one of the most important minerals, plays an essential role in supporting normal heart function, muscle, and bone strength.*
  • Heart Health: Supports already normal heart function.*
  • Vitamins/Minerals/Amino Acids: supplement formulated to provide beneficial support in filling important nutrient gaps.*
  • Our uncompromising operational practices at our state-of-the-art manufacturing facilities surpass GMP standards and manufacturing regulations. All of our products are GMO-free.
  • For 65 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals. As a globally recognized leader in the development of innovative, science-based nutritional supplements, we strive to help healthcare professionals and their patients push their potential for healthy living, today and in the future.*

Sam Lioon, company founder, was a nutritional pioneer. He saw an opportunity to help Americans improve their health, and began selling nutritional supplements directly to healthcare professionals. From that humble beginning, Douglas Laboratories has grown into a globally recognized leader in the development and manufacturing of innovative, science-based nutritional supplements, designed to help healthcare practitioners who are focused on the healthy aging and active lifestyles of their clients.

Benefits of Douglas Labs

State-of-the-art manufacturing facilities that surpass GMP standards and manufacturing regulations. Douglas Laboratories is a globally recognized leader in the development and manufacturing of innovative, science-based nutritional supplements, designed to help healthcare practitioners who are focused on the healthy aging and active lifestyles of their clients.

HIGHLIGHTS:

  • cGMPs for nutritional supplements in accordance with 21 CFR Part 111
  • NSF International has registered Douglas Laboratories as a GMP manufacturing facility
  • ISO 9001:2008 certification and ISO/IEC 17025:2005 accreditation of in-house laboratories
  • VCP (Vendor Certification Program) to ensure raw material quality
  • Approved facility to produce Certified Organic products
  • Approved facility to produce NSF Certified for Sport® products
  • Member of Council For Responsible Nutrition

Real Supplements gives you the best Douglas Laboratories supplements on the market today. Our top-rated lists are fresh and current so you get the best options.

Real Supps Team

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