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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.
L-Arginine 500 mg
L-Arginine capsules contain 500 mg pure, crystalline L-arginine.
L-Arginine 500 mg
$16.50
L-Arginine 700 mg
L-Arginine capsules contain 700 mg pure, crystalline L-arginine.
L-Arginine 700 mg
$31.00
L-Glutamine Powder
A key amino acid for intestinal health and immune function, providing 4 g of pure L-glutamine per serving.‡
L-Glutamine Powder
$51.00
L-Methionine
L-Methionine supplies 500 mg of this essential amino acid.
L-Methionine
$29.50
L-Serine
L-Serine supplies 500 mg of the amino acid in each capsule.
L-Serine
$53.00
L-Theanine
L-Theanine supplies 100 mg of pure L-theanine in each vegetarian capsule. L-Theanine is an amino acid that may promote a sense of calmness.‡
L-Theanine
$42.50
L-Tryptophan
L-Tryptophan is an essential amino acid and a precursor for the synthesis of serotonin. Tryptophan crosses the blood-brain barrier and is converted to L-5-hydroxytryptophan (5-HTP), which in turn is converted into serotonin. Serotonin is an important neurotransmitter necessary for the regulat...
L-Tryptophan
$54.50
Liposomal Glutathione
Liposomal Glutathione contains 250 mg of glutathione in its active reduced form paired with a liposomal phospholipid complex to enhance absorption. Glutathione is an important nutrient in the body that supports antioxidant defenses, cellular function and liver detoxification pathways.‡
Liposomal Glutathione
$87.50
Liquid B12
Liquid B12 provides 1,000 mcg of highly bioavailable vitamin B12 and formulated with methylcobalamin in a tasty and convenient natural cherry-flavored liquid.
Liquid B12
$20.00
Liquid Magnesium
Liquid Magnesium supplies magnesium citrate in a great-tasting pomegranate flavored liquid, sweetened naturally with stevia.
Liquid Magnesium
$38.50
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