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Calcium Ascorbate (Vitamin C) Powder

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Price From: FROM $11.96

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Calcium Ascorbate (Vitamin C) Powder


  • Vitamin C family
  • Neutral salt
  • May improve calcium absorption
  • Taste

  • Mixability

Calcium Ascorbate is Vitamin C (otherwise known as ascorbic acid) in a buffered condition. Vitamin C has a natural acidity, which can be a little too much to handle for those that have gastrointestinal issues. The ascorbic acid is reacted with calcium in order to significantly reduce the acidity of the solution.


Serving Size & Timing

The suggested use of Calcium Ascorbate is a 300mg to 1000mg serving, to be taken up to three times per day, depending on intended effect. The FDA daily value for Vitamin C is about 60mg, meaning that a 1000mg serving would provide about 1370% of the recommended daily value. Taking higher amounts of Vitamin C becomes necessary when under any sort of environmental stresses or traumas, including sickness.

Nutritional Information

Supplement Facts

Serving size: 1000 milligrams
Serving per container: *
Amount Per Serving % Daily Value**
Vitamin C (from Calcium Ascorbate) 877 mg 974%
Calcium (from Calcium Ascorbate) 100 mg 8%
* Daily Value not established.
** Based on 2,000 calorie diet


Sugar, soy, dairy, yeast, corn, gluten and additives

As a dietary supplement, take 300mg (1/16 tsp) to 1000mg (scant 1/4 tsp) up to three times daily, or as directed by physician.

US Standard Measuring Spoons
Spoon Size(level) milligrams
1/16 teaspoon 297
1/8 teaspoon 594
1/4 teaspoon 1188



There are no fillers or additives included in this product, making it completely pure.


There are very few side effects reported from usage of Calcium Ascorbate, and it is nontoxic. Overuse could result in side effects that are common to overuse of most supplements that stimulate the gastrointestinal process. Taking any more than the recommended 2,000mg per day could result in stomach upset, nausea, vomiting, gastric problems, flatulence, diarrhea, etc. If these side effects do occur, they may be avoided by lowering the dosage.

Taking too much Ascorbic Acid at once could cause the body’s levels of Copper to be greatly reduced. This could pose a problem for anyone that has issues with Copper deficiency or an issue with the way Copper is stored in their body. Anyone that has problems with Copper or Iron storage should consult a medical professional before going on this supplement or any other that involves Ascorbic Acid. Pregnant women should be discouraged from going on this supplement without talking to a medical professional first, since it is possible that the excess levels of Vitamin C could cause the child to develop scurvy in utero. However, this type of condition is rare and is usually only witnessed in women who consume around three times the maximum daily dosage, or around 6,000mg per day.


Calcium Ascorbate possesses a pH that is neutral, making it easy in terms of bodily absorption. It is easily mixed into water or juice and can also be included with food. Drink immediately after stirring in or eat immediately after mixture.

In a national survey, it was found that about 5 to 7% of American adults are Vitamin C deficient. Those who were especially at risk included groups such as black males, smokers and people who did not use Vitamin C supplements. The minimum daily value as determined by the FDA seems to be enough to prevent one from being labeled deficient, but it is not known whether this is enough Vitamin C to maintain general health levels.

California residents: Click here for Proposition 65 warning.

Customer Reviews

Finally Settled on this one
Went back and forth between this Calcium Ascorbate and the regular Ascorbic Acid for my horses. I must say that I do seem to see less stomach upset from this one, so plan to stick with it indefinitely. No placebo effect with my boys.... either works well or doesn't, so the "proof is in the pudding" as they say! Current research says horses do not get or produce as much vitamin C as they need. This is cheap insurance!*

On 4/20/2019 Kim said...

Great way to get Vitamin C
I use this product at me chiropractic clinic and are very happy with the results.*

On 11/2/2018 Edwin said...

A non-Acidic form of Vitamin C that is also mild in taste
Straight Ascorbic Acid is sharp in taste, and not easy on the stomach when taken in quantity. Also, the way animals that make their own Vitamin C (human beings do NOT) make it in a mineral ascorbate form, such as this one. There might be special reasons for taking the straight Ascorbic Acid, but for general use, Mineral Ascorbates are certainly easier.*

On 10/28/2018 Benjamin said...

Ascorbic acid is a very useful adjunct to activated sulfur. The combination, when taken daily in appropriate amounts, is demonstrably beneficial to health and will being. .*

On 9/3/2018 Malcolm Skolnick said...

Calcium Ascorbate - Reduce Free Radicals
Calcium Ascorbate is important for cells to perform optimally. I give it my older hounds, along with glucosamine, MSM and Chondroitin to help with their joint and overall health. BulkSupplements has excellent customer service and products.*

On 7/14/2018 claudia said...

Vitamin C
Easy to use, just keep it in a dry place. *

On 6/6/2018 jeffrey said...

Calcium Ascorbate Helps Inflammation
I have been using this form of vitamin C for years. It helps with the pain of inflammation in my fibromyalgia. When I had the flu this year I used the highest dosage to help keep my lungs clear along with N A C. What is so good about it, is that my stomach did not get irritated although I took the dosage every 6 hours. Taking herbs and vitamins from Bulk Supplements is sooo good for my body and pocket.*

On 5/24/2018 Dorene said...

Easy to take
I bought this product so I could get more vitamin C into myself and my kids without having to take a million pills a day. The taste is mild and my kids will drink it dissolved into water with little protest. I have diluted it into a glass of water and taken little sips throughout the day and it has worked very well. I am so glad I purchased this product, and will most certainly be buying it again! *

On 4/18/2018 Jennifer said...

Calcium Ascorbate (Vitamin C) Powder
I bought Calcium Ascorbate for my teeth and my receding gums. I rub it on my gums and let it sit (tastes ruff), but it is working. Thank You Bulk Supplements for carrying such a good product!!!*

On 4/13/2018 Debra said...

Good for allergies
This really calms my food allergies. Taking 1/2 teaspoon 3x/d. Works wonders.*

On 11/23/2017 Bethany said...

Great mixability, minimal taste
Surprisingly, this suspends well in water. The taste is barely there, more like it just makes the water taste more "viscous" in the slightest. I always test a supplement's quality by mixing it in water, that is my standard. With how well this added to water, it would not be noticeable at all in pretty much any other drink. Definitely will get this again when I run out.*

On 9/1/2017 Erik said...

Love the quality
I love that all bulk supplements are pure and don't have any fillers. The vitamin C was super easy to mix and doesn't taste bad at all
I've been using this for my six-year-old son and the fact that it's buffered doesn't cause any irritation to his stomach. I just add it to his juice and he has no idea*

On 6/8/2017 Crystal said...

Another Great Product!
We use this in water, mixes well. I love having the extra calcium. Good price and always fast shipping! *

On 5/19/2017 Jo-Ann said...

My biggest compliment is every supplement I was looking for was on one web site. Fast shipping but was missing part of the order. Amy quickly remedied the mistake and sent out the missing product. I ll be back. *

On 4/26/2017 Michael said...

calcium ascorbate (vitamin C)
i love the product. It's easy to use and travel with. The taste us a bit soar, but with some juice its better. Gives better results then the emerges-C that has fructose.*

On 3/17/2017 Rebeca said...

Calcium Ascorbate (Vitamin C) Powder
First order with Bulk Supplements and was very satisfied. Fast shipping, great prices, and well packaged - will order again. *

On 3/9/2017 Antone said...

Received my Vitamin C, FAST SHIP! Can't wait to try it.. Will leave another review soon*

On 2/27/2017 E.A said...

the best
by far the best source of vitamin C there is. is the most reliable supplier. best possible combo!*

On 12/4/2016 Calcium Ascorbate (Vitamin C) Powder said...

the best
by far the best source of vitamin C there is. is the most reliable supplier. best possible combo!*

On 12/4/2016 Calcium Ascorbate (Vitamin C) Powder said...

Calcium Ascorbate powder good product - easy to use.
I mix this with a variety of drinks to enhance my Vitamin C intake. Mixes easily, easy on taste and stomach.*

On 11/29/2016 Mark said...

Good Stuff
No complaints and no problems. Good stuff.*

On 9/21/2016 Kane said...

Calcium Ascorbate (Vitamin C) Powder
Mix this with my pre and post workout drinks. Mixes well.

Great price. Much better value than purchasing Emergen-C elsewhere.

Plus the shipping was super quick too.*

On 7/12/2016 Andrew said...

I like your Vit C powder and the excellent service.
Thanks for the good quality products and the quick handling of the orders.*

On 6/14/2016 Richard said...

Calcium Ascorbate (Vitamin C) Powder
This Buffered Vitamin C mixes easily in water, is gentle on the stomach, and provides the added benefit of providing Calcium at the same time. It is a great complement when taken with MSM powder, and is a good price.*

On 6/9/2016 Joseph said...

Vitamin C
I use this product in my water. I feel better and healthier.
Love all the products I use from Bulk Supplements and the delivery is fast. Thank you*

On 5/30/2016 Joan said...

Vitamin C
I love how quickly it shipped. I love the prices. Less than 500 grams sell for the same price as 1 kg. in Vitamin stores! Forever a loyal customer!*

On 5/25/2016 SHELLIE said...

Good Buy
Very pleased with product and pricing. Will be a returing cuctomer*

On 5/9/2016 Stephen said...

I bought this product after having an interest in supplementing with Vitamin C, but knew that other forms do not get absorbed as well as this. This is by far the best pricing and quality of product I have found in my search. Shipping is as fast as possible. The service also rewards you well for being a loyal customer*

On 4/4/2016 Robert said...

Great "C" powder
I bought this product after having an interest in supplementing with Vitamin C, but knew that other forms do not get absorbed as well as this. This is by far the best pricing and quality of product I have found in my search. Shipping is as fast as possible. The service also rewards you well for being a loyal customer*

On 4/4/2016 Robert said...

Great form of Vitamin C
I am very pleased as usual. I am never sick and my eye sight has improved. I recommend this product to everyone.*

On 3/30/2016 SHARON said...

I use this powder in my lotions, creams, (facial products). Although this can be taken orally, my usage is for the above. However, I have taken it a few times nightly, but also purchased the capsules for oral ingesting. I feel better than normal, but I also take three other of the Bulk Supplements nightly. So not being sure which one is the best, my take would be that they all are! When I run low or need additional powders, I will do all my ordering from Bulk Supplements. Their site is great and I love shopping with them. Their products have proven to be excellent for me whether, oral or product usage. They ship extremely well. I have had no issues with my shipping, nor the products themselves. Packaged great!

The powders that, (at this time), I have used so far are the Hyaluronic Acid, DMAE, Vitamin E and the Ascorbyl Palmitate, which are mixed together in my lotions and serums. At this time, I have noticed smoother forehead wrinkles and crow's feet. This is great! I will continue to make, use and sell this product as homemade wrinkle creams and serums. All 100% pure.*

On 3/2/2016 Lana said...

Awesome "C" powder
I love this product. It keeps me healthy and helps my eye sight.*

On 2/16/2016 SHARON said...

The best form of Vitamin C
I bought this product after having an interest in supplementing with Vitamin C, but knew that other forms do not get absorbed as well as this. This is by far the best pricing and quality of product I have found in my search. Shipping is as fast as possible. The service also rewards you well for being a loyal customer!*

On 2/10/2016 Phillip B said...

Great Vitamin C Powder
It dissolves perfectly in water as a daily supplement with no stomach or bladder upset. I have IC so it is important that this product is not highly acidic.

I also use it mixed with Coconut Oil and Vitamin E oil as a face scrub and it makes my skin feel soft and amazing.*

On 12/22/2015 Lauren said...

Easy way to get higher dose of Vitamin C
This powder mixes well and allows for higher dosing of Vitamin C at a reasonable price without stomach irritation and taking a lot of pills.*

On 12/13/2015 Judith said...

best price
I received my order quickly and like the pricing on all of the items I purchased. the powder dissolves easily in any liquid I choose. I will continue to purchase from bulk supplements. Very satisfied. *

On 12/8/2015 Kathleen said...

Mixes really fast
Great packaging. Very pure and consistant texture and best disolving powder yet! Also, very fast shipping!*

On 12/7/2015 Jimmy said...

Calcium Ascorbate (Vitamin C) Powder
I love this product. It keeps me from catching colds and helps my vision. Vitamin C is overall a great healer. I love this powder vs. the pills. Thanks*

On 12/3/2015 SHARON said...

Calcium Ascorbate (Vitamin C)
Great product! I add it to my morning water everyday!*

On 11/21/2015 John said...

Calcium Ascorbate (Vitamin C) - 500g Pure Powder
Great product! I mix all my bulk supplements in one drink instead of taking a ton of pills. Slight bitter taste, but doesn't bother me with a little fruit juice added. Easy way to take it and I love that it's pure and pH neutral so it doesn't upset my stomach. *

On 10/12/2015 Linda said...

great product
I add this to a morning shake. Dissolves quickly no chalky taste. Highly recommend*

On 10/6/2015 erik said...

Calcium Ascorbate (Vitamin C) Powder
I am very very pleased with this vitamin C Powder. It is a great value. I just add 1/4 tsp. along with my other powderd supplement and mix into my morning shake to get a good health shake for much lower price than purchasing capsules.


On 6/9/2015 Adriana said...

Supplies just the right amount of Calcium and Ascorbate before running five 50-second sprints
The following is a list of clinical trials testing the many diverse benefits (and detriments) of supplemental calcium from the National Medical Library MEDLINE as abstracted by GreenMedInfo:

1. Calcium ameliorates exercise-induced reduction in testosterone levels, which may be useful for increasing overall athletic performance.
2. Calcium content in vegetables is correlated with bitterness.
3. Calcium supplementation may actually increase the risk of bone fracture.
4. Due to the high hair calcium and magnesium levels in patients with Fibromyalgia supplementation with calcium and magnesium may be beneficial.
5. Esophageal cancer is associated with high dietary calcium in a vegetarian population and a low level of zinc.
6. High dietary intake of seaweed, calcium, magnesium, and phosphorus may be associated with a decreased prevalence of allergic rhinitis [allergies].
7. Maternal calcium supplementation during pregnancy reduces dental caries of children at 12 years of age.
8. Mineral water rich in calcium, magnesium and bicarbonate improves urine composition and reduces the risk of calcium oxalate formation.
9. Taking calcium supplements without food/at bedtime may increase the risk of calcium oxalate nephrolithiasis.
10. Vitamin D and calcium supplementation may improve symptoms in chronic periodontitis.
11. Calcium, Vitamin D and a Gluten-Free diet decreased bone pain and improved muscle strength.
12. A drug named "Medetopect" consisting of apple pectins, vitamin C and calcium phosphate reduces absorption of Plutonium-239 and Americium-241 from the gastrointestinal tract of animals.
13. A Western-style diet produces hyperproliferation of epithelial cells in several organs and that the changes can be prevented by increasing dietary calcium and vitamin D alone.
14. Calcium and vitamin D may prevent Western-style diet-induced colonic tumors.
15. Ca2+, Mg2+, Zn, and Se have an important role in congestive heart failure.
16. Calcium may contribute to atherosclerosis and magnesium prevent it.
17. Calcium, vitamin D, vitamin A may have a therapeutic role in diseases such as rosacea and psoriasis by influencing the innate antibiotic and immunomodulator cathelicidin.
18. Individuals with untreated celiac disease may have reduced bone mineral density associated with deficiencies of nutrients.
19. Review of essential nutrients for bone health and their availability in the average North American diet: [Vitamin D3, vitamin K2, vitamin C, magnesium, exercise, boron, calcium, silicon, zinc, manganese, and copper.]
20. Calcium supplementation suppresses bone formation in Mg-deficient rats.
21. Food and not supplemental calcium increases nutrient levels.
22. Higher calcium and vitamin D intake influences bone mass by creating greater density but does not create greater strength as indicated by no reduction in the 3-year risk of fracture.
23. Higher calcium intake correlates with increases in osteoporotic fracture risk.
24. Higher consumption of milk or other food sources of calcium by adult women does not protect against hip or forearm fracture.*

On 1/6/2015 Stephen said...

good customer service
I had a minor mistake in my order. The order was fixed after contacting cust svc. I like this company, they have good products at good prices. Items arrive promptly and the quality is good.
I will continue to order from them as they are responsive.*

On 9/29/2014 howard said...

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Product Questions

Would taking 5 g 5 times a day hurt anything?