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L-5-MTHF 1,700 mcg DFE (1 mg) 120 Vegetarian Capsules
Methylated Folate
Folate (vitamin B9) is provided in its biologically active form, L-5-MTHF, which supports normal methylation and homocysteine balance.*
Gluten Free Dairy Free Soy Free Vegetarian Non-GMO
Designs for Health's logo, text, trademarks, graphics, and photo images are the prop...
L-5-MTHF 1,700 mcg DFE (1 mg) 120 Vegetarian Capsules
$57.49
L-5-MTHF 8,500 mcg DFE (5 mg) 60 Vegetarian Capsules
Methylated Folate
Folate (vitamin B9) is provided in its biologically active form, L-5-MTHF, which supports normal methylation and homocysteine balance.*
Gluten Free Dairy Free Soy Free Vegetarian Non-GMO
Designs for Health's logo, text, trademarks, graphics, and photo images are the prop...
L-5-MTHF 8,500 mcg DFE (5 mg) 60 Vegetarian Capsules
$91.49
L-Arginine - Sustained Release
L-arginine is a conditionally essential amino acid, meaning that while your body can make it, it becomes necessary to get it in through diet or supplementation under certain circumstances or for certain physical conditions. L-arginine, like other amino acids, is a building block of protein, whic...
L-Arginine - Sustained Release
$22.00
L-Arginine 500mg - 60 Capsules
L-Arginine capsules contain 500 mg pure, crystalline L-arginine.
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 sta...
L-Arginine 500mg - 60 Capsules
$16.50
L-Arginine 700mg - 100 Capsules
L-Arginine capsules contain 700 mg pure, crystalline L-arginine.
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 sta...
L-Arginine 700mg - 100 Capsules
$31.00
L-Arginine Plus
L-arginine is a conditionally essential amino acid, meaning that while your body can make it, it becomes necessary to get it in through diet or supplementation under certain circumstances or for certain physical conditions. L-arginine, like other amino acids, is a building block of protein, whic...
L-Arginine Plus
$39.05
L-Carnitine
L-Carnitine plays a role in free fatty acid metabolism and metabolic health and is required for the breakdown of fats and glucose into energy. Decreased levels of L-carnitine have been observed during pregnancy, supplementation has been shown to help improve plasma levels.*
Metag...
L-Carnitine
$34.95
L-Carnitine 500 60 Capsules
L-Carnitine L-Tartrate
A dietary supplement containing the levo-enantiomers of carnitine and tartrate with potential chemoprotective and antioxidant activities.
L-carnitine L-tartrate increases fatty acid oxidation and reduces purine catabolism and free radical formation, which may prevent exerc...
L-Carnitine 500 60 Capsules
$46.00
L-Glutamine - 60 Capsules
L-Glutamine 500 mg capsules contain 500 mg of pure crystalline L-glutamine.
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...
L-Glutamine - 60 Capsules
$15.50
L-Glutamine 120 Vegetarian Capsules
Free-Form Glutamine for Healthy Gut Barrier Function*
Delivers free-form L-glutamine to support healthy mucosal cell function in the GI tract and immune health.*
Gluten Free Dairy Free Soy Free Vegetarian Non-GMO Vegan
Designs for Health's logo, text, trademarks, graphics, and photo images...
L-Glutamine 120 Vegetarian Capsules
$49.99
L-Glutamine Powder
L-glutamine is the most abundant amino acid in human muscle and blood plasma, supporting cellular integrity throughout the body and brain.◆ It is a conditionally essential amino acid, meaning the body’s demand for it increases during instances of stress and/or prolonged physical activity.L-gluta...
L-Glutamine Powder
$42.25
L-Glutamine Powder
Free Form Glutamine for Healthy Gut Barrier Function*
Delivers free-form L-glutamine to help promote optimal muscle growth and strength.* Offered as a powder to mix in your favorite drink.
Gluten Free Dairy Free Soy Free Vegetarian Non-GMO Vegan
Designs for Health's logo, text, trademarks,...
L-Glutamine Powder
$83.49
L-Glutamine Powder
Free Form Glutamine for Healthy Gut Barrier Function*
Delivers free-form L-glutamine to support healthy mucosal cell function in the GI tract and immune health.* Offered as a powder for individuals with difficulty swallowing.
Gluten Free Dairy Free Soy Free Vegetarian Non-GMO Vegan
Designs...
L-Glutamine Powder
$58.99
L-Glutamine Powder - 250 Grams
A key amino acid for intestinal health and immune function, providing 4 g of pure L-glutamine per serving.‡
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:...
L-Glutamine Powder - 250 Grams
$51.00
L-Glutamine Powder - 90 Scoops
L-glutamine, the most prevalent amino acid in the bloodstream, is found in high concentration in the gastrointestinal tract, which is the greatest user of glutamine. Many factors can play a part in the depletion of glutamine, such as food allergies, and various bodily insults like injury, infect...
L-Glutamine Powder - 90 Scoops
$40.41
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