No Thanks

Your 10% Off Promo Code is on the Way! Thanks for signing up for emails.

You're now signed up to receive exclusive deals and savings opportunities!

Thanks again for connecting with us. Keep an eye on your inbox — your first coupon is on its way!

Thank You! This email address is already signed up

You are signed up for the following:

  • Offers
  • Recipes
  • E-Newsletter
  • Updates & Reminders

Thank you for your interest and be assured that you will continue to receive our emails at this address.

Look for your next communication from us within the next week.


We are having trouble processing your request.

Our apologies!

Please try again later.

Search Please enter an item number or keyword
Shop by
Do You
Need Help?

NOW Foods

Pure, Buffered Calcium Ascorbate

Pure, Buffered Calcium Ascorbate

Item: NWF594

  • Vegetarian & vegan formula

  • 100% pure buffered vitamin C powder

  • Antioxidant protection

8 oz (227 g) Pwdr

MSRP $18.99
Save 39%
Yes! I want free shipping over $50 on my next automatic shipment of this item.  days. Learn more
In Stock

Supplement Facts

Serving Size ¼ Level Teaspoon (1.12 g)

Servings Per Container about 203

  Amount Per Serving % Daily Value
Vitamin C(from Calcium Ascorbate) 890 mg 1,483%
Calcium(from Calcium Ascorbate) 100 mg 10%

Other ingredients: None.

Suggested Usage: Take ¼ level teaspoon 1 to 3 times daily.

Caution: For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. Keep out of reach of children.

Natural color variation may occur in this product.

This product is sold by weight not volume.

Store in a cool, dry place after opening.

  • Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.
  • Produced in a GMP facility that processes other ingredients containing these allergens.
  • Non-GMO
  • Vegetarian/Vegan
  • Recyclable Bottle.

Shipping Weight

.60 lbs

  • Vegetarian & vegan formula

  • 100% pure buffered vitamin C powder

  • Antioxidant protection

Calcium ascorbate is an optimal nutritional supplement that combines ascorbic acid (vitamin C) with calcium carbonate. By combining these two dietary ingredients, we have created a buffered source of vitamin C that will not contribute to gastric irritation in sensitive persons.

NOW Foods Pure, Buffered Calcium Ascorbate Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

Pure, Buffered Calcium Ascorbate is rated 4.8 out of 5 by 9.
Rated 5 out of 5 by from Good source of vitamin C I like this vitamin C powder. It mixes well in water. I mix it together with msm & magnesium in 2 qts. of water which I drink daily. Taste is not a problem.
Date published: 2015-10-15
Rated 5 out of 5 by from Best Vitamin C I've ussed I've used a number of different vitamin C products and this one is the best I've come across. It is cost-effective, easily dissolved, and does not cause acid-related difficulties. I use it every day and have for several years--would not be without it!
Date published: 2013-05-26
Rated 5 out of 5 by from 'Buffered vitamin C Vitamin C (ascorbic acid) has been proven to be of benefit in many areas of our health. This form of C is buffered so that it doesn't affect the pH of one's stomach.
Date published: 2013-04-09
Rated 5 out of 5 by from Many years ago my ND recommended vitamin C as calcium ascorbate in powdered form and I've been using it ever since. Now's product dissolves well in liquid with no bitter taste, as the calcium buffers the ascorbic acid. It's great added to flavored water. Now has a great product and Swanson's price can't be beat!
Date published: 2013-03-30
Rated 5 out of 5 by from Mixes well This dissolves better than most i have tried.
Date published: 2012-09-19
Rated 5 out of 5 by from Great Product I've got a sensitive stomach and GI tract, and this is a perfect way to get the extra vitamin C I need. I don't get any discomfort with this like I did other forms of vitamin C.
Date published: 2012-07-28
Rated 3 out of 5 by from It's Good enough Does the job More effective than Regular Vit C
Date published: 2012-04-22
Rated 5 out of 5 by from Calcium Ascorbate I can't take jus any type of Vitamin C. Calcium Ascorbate contains Vitamin C, but it doesn't have the negative effects of other Vitamin C brands. Excellent!
Date published: 2011-07-01
  • y_2017, m_12, d_14, h_19
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_1, tr_8
  • loc_en_US, sid_NWF594, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_swansonhealth
Swanson Quality Assurance

Why Shop Swanson®?

We know how important your health is to you and your loved ones. That’s why we’re focused on delivering only high quality products you can trust at the best value.

Our lab evaluates every product to make sure it’s compliant with strict standards and government regulations, and we fully believe in and stand behind our products. If you’re dissatisfied for any reason, we’ll give you a full refund and pay return shipping.

Swanson's Standards

We are dedicated to offering the highest quality products at the best price. Find out more about how we ensure such a high standard in everything we do.

Learn More
Customer Service
About Swanson

Easy Refill

  • Get your favorite products delivered automatically
  • 10% off future orders of Swanson brand products in your subscription
  • FREE standard shipping on all future orders over $50
  • Control the frequency, delivery date, item quantity... or cancel at any time
  • Email reminders before each delivery
See all FAQs here