Calcium Ascorbate VS Sodium Ascorbate: Which One Is Better?

Calcium Ascorbate VS Sodium Ascorbate

Calcium Ascorbate VS Sodium Ascorbate: Which One Is Better?

Calcium Ascorbate and Sodium Ascorbate are different forms of Vitamin C. These two ingredients are also often mentioned in the market. Today, Nutri Avenue uses the topic “Calcium Ascorbate VS Sodium Ascorbate: Which One Is Better?” to learn about these two forms.

Calcium Ascorbate VS Sodium Ascorbate: What Are They?

Vitamin C is a water-soluble vitamin. It exists in the blood and cells as reduced ascorbic acid. It is absorbed mainly in the small intestine. It has the simplest molecular structure, the most unstable physical and chemical properties, the largest daily requirement of the human body, and the most concentrated dietary distribution.

Vitamin C comes in 3 different forms, including Ascorbic Acid, Sodium Ascorbate, and Calcium Ascorbate. Ascorbic Acid is the most common form. Sodium Ascorbate and Calcium Ascorbate are the two forms more easily absorbed by the intestines.

What Is Calcium Ascorbate?

Calcium Ascorbate is the salt form of ascorbic acid and calcium ions. In 1946, the United States had successfully developed this ingredient. Its properties are more stable than Vitamin C and have a better absorption effect. It has the full effects of VC in the body. Its antioxidant effect is also better than that of VC. Moreover, due to the introduction of calcium, its nutritional strengthening effect is also enhanced.

Calcium Ascorbate appears as a white to light yellow crystalline powder. This ingredient is odorless, soluble in water, slightly soluble in ethanol, and insoluble in ether. Its CAS number is 5743-28-2.

This ingredient is also a food additive. Its E number is E301. As a preservative, it is used in fruits and vegetables. As an antioxidant, it is used in ham, meat, and buckwheat flour. It is a non-ionic surfactant and nutrient used in skincare and hair care. As a bactericide, it can be used for lens cleaning. As a calcium salt, it prevents osteoporosis. Adding it to tea and drinks can lower blood pressure. Research results also show that calcium ascorbate blocks DNA synthesis in cancer cells. It has an inhibitory effect on malignant tumors. Therefore, it is also used in the clinical adjuvant treatment of cancer.

How To Produce Calcium Ascorbate?

Typically, calcium ascorbate is prepared by reacting vitamin C with an appropriate amount of calcium hydroxide or calcium carbonate. Appropriate temperature and pH values need to be controlled during the preparation process to ensure the smooth progress of the reaction. The final product needs to undergo corresponding purification and drying.

What Is Sodium Ascorbate?

Sodium Ascorbate is an organic compound, also called L-Ascorbic Acid Sodium Salt. Its chemical formula is C6H7O6Na. The ingredient is odorless and has a slightly salty taste. The appearance of Sodium Ascorbate is white to slightly yellowish-white crystalline powder or granules. In the dry state, this ingredient is relatively stable. The color deepens when exposed to light. It slowly oxidizes and decomposes after absorbing moisture and in aqueous solution. Compared with VC ascorbic acid, it is more soluble in water.

Sodium Ascorbate has a strong antioxidant capacity and can be converted into vitamin C in the human body. It is widely used in the food industry for preservation and antisepsis. It can effectively prevent the formation of carcinogen nitrite amines in pickled foods, remove the discoloration, odor, and turbidity of food and beverages, and is widely used in preserving meat, fish, vegetables, fruits, beverages, and cans. No toxic or side effects.

How To Produce Sodium Ascorbate?

First, it can be obtained by successively adding sodium bicarbonate and isopropyl alcohol to the ascorbic acid solution and reacting.
This component can also be obtained by heating and reacting ascorbic acid with sodium carbonate, followed by filtration.

Vitamin C Ascorbic Acid VS Calcium Ascorbate VS Sodium Ascorbate

First, Ascorbic Acid, Calcium Ascorbate, and Sodium Ascorbate are the three forms of vitamin C. Among them, ascorbic acid is pure vitamin C. The latter two are the two salt forms from which it is derived.

One obvious difference between Calcium Ascorbate and Sodium Ascorbate is the purity of the vitamin C compared to Ascorbic Acid. For example, because sodium ascorbate is diluted by sodium, you only get 890 milligrams of vitamin C per gram consumed. It means that you need to consume more sodium ascorbate to get the same amount of vitamin C as ascorbic acid.

Additionally, one problem with ascorbic acid is that it tastes sour. Therefore, people who already have gastrointestinal problems such as heartburn or acid reflux may have their condition worsened by high acidity. For example, the ascorbic acid in Sodium Ascorbate is diluted with sodium. Therefore, it is less acidic than pure ascorbic acid. It is more friendly to the stomach.

The biggest difference between Calcium Ascorbate and Sodium Ascorbate is their different ingredients. One contains calcium ions, and one contains sodium. Since ascorbic acid has a high acidity, adding sodium can dilute it and make it less acidic. However, calcium ascorbate forms an acidic solution in water. Therefore, it is also more acidic.

Calcium Ascorbate VS Sodium Ascorbate: Which One Is Better?

Currently, there is no clear research on whether Calcium Ascorbate or Sodium Ascorbate is better. Both can be used as food additives. They have strong antioxidant effects.

For products that need to highlight the effectiveness of calcium supplementation, we recommend Calcium Ascorbate because it contains calcium ions.

If you want to control the acidic taste of your product, Sodium Ascorbate may be a better choice. Therefore, different product needs can have different optimal choices.


Ascorbic Acid, Sodium Ascorbate, and Calcium Ascorbate are three common forms of vitamin C. In talking about the topic of “Calcium Ascorbate VS Sodium Ascorbate,” no evidence proves which one is better. Therefore, there are different best choices based on different product needs. Nutri Avenue provides raw materials related to vitamin C to support product development. Welcome to contact us to obtain product information, such as COA and the latest quotation.

Share this post with your friends

Get a Free Quote

Stay In Touch

How can we help? Get free samples, pricing and stock list.

USA address
1641 W Main St, Ste 222, Alhambra, CA 91801
China address:
Room 209 , Huana Business Center , NO 1733 Lianhua Road , Minhang District , Shanghai , China 201103

Top Sellers

Nutri Avenue

how can we help ?

Bulk raw Ingredients Supplier

Nutri Avenue

Leave your details below, and let us help you get fresh, high-quality ingredients ASAP.