Doctor’s Best Best Vitamin C 500mg, 120 Count
$12.13
Vitamin C is a key compound in the body’s “antioxidant network,” a chain of synergistic, inextricability linked, well-studied antioxidants that includes glutathione (GSH) and vitamin E. When vitamin E uses its antioxidant function in neutralizing free radicals, it also loses this antioxidant function. Vitamin C can change this status; it can regenerate vitamin E back to its native form, and is thought to “spare” glutathione in the body as well. Importantly, when ascorbate donates an electron and becomes itself oxidized, or “consumed,” the ascorbate radical is relatively harmless. In a double-blind, placebo-controlled study in which blood GSH was measured in healthy subjects at several stages, 500 mg of vitamin C taken daily for 2 weeks significantly raised erythrocyte (red blood cell) glutathione levels. The researchers concluded that vitamin C supplementation at that level can benefit the overall antioxidant capacity of the blood. In another study of similar design, 1000 mg of vitamin C taken daily for 4 weeks bolstered vitamin E and glutathione content in erythrocyte cell membranes, compared with placebo. The highest concentrations of vitamin C in the body are found in the central nervous system (in neurons of the brain & spinal cord) and the adrenal glands. Although the presence of ascorbate in neurons is in part explained by its neuromodulatory enzyme activity, its high concentration suggests that vitamin C is so greatly retained by neurons in order to address the higher rates of oxidative metabolism experienced by the brain. This has led to the conclusion that under normal conditions, vitamin C helps safeguard the integrity of neurons (and therefore the brain), largely through neutralization of the free radicals of reactive oxygen species (ROS). Low levels of blood vitamin C and the resulting accumulation of ROS are thought to be detrimental—especially to aging populations.
Is Discontinued By Manufacturer : No
Product Dimensions : 2.19 x 2.19 x 4.25 inches; 3.2 ounces
Item model number : DRB-00256
Date First Available : July 12, 2011
Manufacturer : Doctor’s Best
ASIN : B005CD3ZTI
Country of Origin : USA
Vegan
Gluten Free
Soy Free
Turk –
Its a vitamin.
Has vit c in it. Take for super human immune system.
LJN –
Safe product
Good brand, safe and reasonable price.
Heymon –
Easy way to get 500mg of vitamin C
Switched from another brand at a larger dosage to these 500mg capsules. We really like the smaller size for swallowing plus getting a more appropriate daily dosage of vitamin C. We’ve been fans of this brand for other vitamins as well. No digestion or absorption issues.
Rudy likes it! –
Just knowing these don’t come from China, like most vitamin by-products, is all I need to know!
Made in Scotland! Sold! Family takes one every day as nobody eats enough vitamin C/citrus, etc., so we try to ward off anything with quality supplements. I care that these are not sourced with any third world by-products, as I check where my rx’s are sourced also, so I care about quality. These are reasonably priced when you buy in bulk!
Mparis –
This is a great form of vitamin C
I have been using this product for about five years and it is the best that I’ve ever used.
Anonymous –
Capsule is made of Hypromellose
Capsule is made of Hypromellose. Just an FYI. I love the Vitamin C powder by this company and thought I would try their capsules too. I’m not sure what I think of them yet.
jimmy shanahan –
Estas vitaminas me ayudan a prevenir gripes
Me encanta
Alexis –
Love this vitamin C
This product is great. It doesn’t cause stomach issues.