





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 : 2.63 x 2.63 x 5 inches; 6.4 ounces
Item model number : DRB-00257
Date First Available : July 12, 2011
Manufacturer : Doctor’s Best
ASIN : B005CD3J4O
Best Sellers Rank: #8,947 in Health & Household (See Top 100 in Health & Household) #73 in Vitamin C Supplements #962 in Sales & Deals #1,099 in Diet & Sports Nutrition
Customer Reviews: 4.7 4.7 out of 5 stars 10,240 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
VITAMIN C WITH Q-C – Doctor’s Best Vitamin C contains Q-C, which is manufactured in Scotland and prized for its high quality and reliability. Vitamin C is known for immune health support and antioxidant support.*
IMMUNE SUPPORT- Vitamin C is essential for the synthesis of collagen, carnitine, and certain brain chemical transmitters, provides fundamental support for the brain, eyes, skin, heart, circulation, and immune system.*
POWERFUL ANTIOXIDANT – Ascorbic acid is vital to the body for its role as an electron donor, supporting metabolic enzymes, enhances the body’s antioxidant potential, also protects against free radical damage, which can lead to oxidative stress.*
TRUSTED AND PURE – 1000mg of Vitamin C with Q-C each serving. Gluten Free, Non-GMO, Soy Free, Vegan. Doctor’s Best is committed to the safety of all of our products, offering a clean and reliable supplement for your well-being.
Customers say
Customers find this vitamin C supplement to be of excellent quality and effective at strengthening the immune system. The product receives positive feedback for its value, ease of swallowing, and absence of stomach issues, with one customer noting it doesn’t cause heartburn. Customers appreciate that it’s made without GMOs and sourced from Scotland, and they like that it contains no unnecessary ingredients. The capsule size receives mixed reviews, with some finding it normal while others consider it too large.
13 reviews for Doctor’s Best Vitamin C with Q-C – Vitamin C 1000mg Non-GMO, Vegan, Gluten Free, Soy Free, Sourced from Scotland Veggie Caps, 120 Count
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$17.08


Joy Marino –
Quality product
This is a great clean product. I have purchased many times. There is no smell and it is normal size for a capsule.
DLynnC –
Really?! Update!
I’ve been taking this brand of vitamin-C for about 7 years now, where I was able to buy 2 bottles (wish I had gotten more) of it about a year ago because it briefly dropped to under $7. During most of those years I’ve had a subscription for it while it was under $14, then about a week ago I got a notice it was out of stock, which is worrisome due to all the crappy vitamin C that’s totally useless out here, but I had no choice and bought the Vit-C from a brand I’ve been using since the 70s for about the same cost Dr Best capsules are but they’re tablets. So far my nose isn’t runny (writing “runny” now reminded me of when I was a school kid asking my teacher could I get some tissues for my runny nose, he said in front of the class.. “you better start running after it now before it gets away”👃🏼🏃🏽♀️👀 I guess you had to be there.😩Anyway, yeah, my nose isn’t runny, I’m not uncontrollably sneezing and I’m not getting cold sores like it begins to do when I’ve tried other Vit-C brands other than Dr. Best, something I’m really relieved about AFTER seeing the huge hiked up price it’s become now once back in stock! How can you do this to us?! $20?!So, ciao bella Best for NOW!UPDATE!About 2 weeks into using that other reliable brand of vitamin-c, the lymph nodes in my armpit began to swell and ache pretty bad, also an area of my gums became inflamed, as well, so I decided to look elsewhere for Doctor Best again, where I found it for $13, so even though I’ve since made doctor appointments for both issues I began to have, after 3 weeks of being back on Doctor’s Best all the swelling, aching and gum inflammation has all but disappeared now! I’m just going to stock up on DB brand so that I don’t run out again because it’s a far more superior vitamin-c than even that expensive Liposomal type.
Jay Park –
Good Vitamin
Vitamin C is an essential nutrient that helps support the immune system and overall health. While a healthy diet is the best way to get the nutrients your body needs, it’s not always possible to get enough from food alone. Taking supplements can help fill in the gaps and ensure that you’re getting the recommended daily intake of vitamin C. It’s great to hear that you and your family are eating healthy and taking extra vitamins and herbal remedies to stay healthy. You mentioned that you prefer a vitamin C brand that is not from China. While it can be challenging to find vitamin C supplements that are not sourced from China, there are some options available
SCT –
Yay, no fillers!
The only 1000-mg vitamin C I’ve been able to find without all the unnecessary crap!
AJ –
Recommend if you don’t mind the size of the capsule.
After doing some research about the best vitamin c supplements, this one seem to be one of the top ones and also has some of the best reviews out there. So I decided to give it a try and so far I have no issues with the results, the capsules are quite larger than average, so for some people they might find them a bit hard to swallow but other than that, it’s a good product…
Dorothy Grandjean –
Good quietly and decent price for quantity
Helps with controlling hot flashes.
Albaida Corrado –
Súper recomendada!
La mejor forma de vit C que no es importada de China 🙃
Edwin Ho –
vitamin C
Very Good Health Doctor and in Losgaza home
Sohail –
Highly effective vitamin c
JL –
I’ve been taking vitamin C supplements for over a decade and have tried various brands. A few years ago, I learned about Quali-C, a high-quality form of ascorbic acid manufactured in Scotland by DSM. Since then, I’ve been specifically seeking out supplements that use this ingredient, and Doctor’s Best Vitamin C has been my go-to choice.One of the standout features of this product is its use of Quali-C, which is renowned for its purity and reliability. This gives me confidence in the supplement’s effectiveness. I take one capsule in the morning and another in the evening. Since adopting this routine, I’ve noticed a significant decrease in the frequency of colds.The capsules are easy to swallow and gentle on the stomach, even when taken on an empty stomach. This is particularly beneficial for those with sensitive digestive systems. Additionally, the product is non-GMO, vegan, gluten-free, and soy-free, aligning with various dietary preferences.Overall, Doctor’s Best Vitamin C with Quali-C provides consistent quality and effectively supports my immune health. I highly recommend it to anyone looking for a reliable vitamin C supplement.
Mordecai Chua –
repeated order many time!
MIRZA YASAR MEHMOOD –
wow is very very great vitamin c its working well
jan daniels –
I am fussy with what I put into my body so did a lot of research for the best vitamin C in capital form so I ordered these