Acetyl-L-Carnitine (ALC) is a naturally occurring form of L-Carnitine in the body that is involved in the metabolism of fatty acids into the universal energy molecule ATP. ALC supports the biosynthesis of acetylcholine, a key neurotransmitter for brain and nerve cell functions which regulates activities of the vital organs, blood vessels, and communication between nerves and muscles. ALC also supports levels of glutathione, a significant antioxidant sustaining neurons and protecting cellular components from superoxide radicals.

Doctor's Best Digestive Enzymes is a uniquely formulated, full-spectrum high potency digestive enzyme blend created to complement and support the body's own digestive capacities. Each capsule provides the body with enzymes designed to optimally aid the digestion of fats, proteins and carbohydrates present in cooked and raw food. The formula supplies the added support of alpha-galactosidase and beta-glucanase to break down vegetables, beans and grains, and enzymes such as glucoamylase and invertase to assist with the digestion of sugars. In addition, this complete formula contains friendly bacteria to uniquely promote optimal intestinal health.

Doctor's Best Digestive Probiotic supplies three stains of Bifidobacterium and three strains of Lactobacillus probiotics, all of which may benefit digestive and whole-body health. Scientific studies have shown that ingestion of these specific strains of friendly bacteria supports several physiological functions, particularly the body's natural immune system and general intestinal well-being. The probiotic strains found in Doctor's Best Digestive Probiotic at the potency of 20 Billion Colony Forming Units (CFU) may help support gastrointestinal tract function and digestive health.

Doctor's Best Natural Vitamin K2 features MenaQ7®, vitamin K2 as MK-7. K2 is a superior form of vitamin K called menaquinones, which have shown greater bioavailability than the more commonly used vitamin K1.

Doctor's Best Pure Collagen Types 1 and 3 contains pure collagen protein, which contribute to the growth and maintenance of healthy tissues. Collagen is the structural protein essential for the strength of bones and flexibility of joints, tendons, ligaments, hair, skin, nails, and other tissues throughout the body.

Collagen Types 1 and 3 Powder is enzymatically hydrolyzed into component peptides with a small molecular size for optimal absorption and utilization by the body.

Doctor's Best Sustained-Release Niacin with niaXtend® provides niacin in a form that helps minimize the incidence of uncomfortable skin flushing that is commonly associated with niacin. Approximately 200 coenzymes are comprised of niacin that play pivotal roles in metabolism and energy production within the body.