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Thorne Research, Buffered C Powder, 8 oz (227 g)

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In Stock
  • Expiration Date: Jul 2018
  • Shipping Weight: 0.77 lbs (0.35 kg)
  • Product Code: THR-15502
  • UPC Code: 693749155027
  • Package Quantity: 8 oz (227 g)
  • Dimensions: 3.7 x 3.7 x 3.8 in, 0.65 lbs (0.29 kg)
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Product Overview


  • Dietary Supplement
  • Hypoallergenic

For individuals sensitive to the acidity of pure ascorbic acid

  • A buffered vitamin C supplement for individuals with a sensitive or compromised digestive system
  • Made with pure, crystalline vitamin C
  • An inexpensive source of vitamin C and the major minerals
  • The easiest way to take a higher amount of vitamin C

High amounts of vitamin C – several grams daily – have been advocated for optimizing both immune function and antioxidant support. Evidence for the efficacy of consuming high amounts of ascorbic acid is due in large part to the groundbreaking research conducted in the 1970s and 1980s by two-time Nobel Prize winner, Linus Pauling, PhD.

Taking high amounts of vitamin C can be a challenge for individuals who have sensitive or compromised digestive systems. For these individuals, Thorne Research has developed Buffered C Powder. Each scoop supplies the same pure, crystalline vitamin C found in Thorne's Pure Ascorbic Acid, along with a blend of calcium, magnesium, and potassium mineral ascorbates that serve as a buffer, allowing sensitive individuals to take large amounts of vitamin C with ease and comfort. In addition to 2,350 mg of vitamin C in each scoop, Buffered C Powder provides 350 mg each of calcium and magnesium and 99 mg of potassium.

Suggested Use

Add 1 heaping (5.3g) scoop to 8 ounces of water one to two times daily or as recommended by your health-care practitioner.


Tamper Evident: Use only if bottle is sealed.

If pregnant, consult your health care-practitioner before using this product.

Store tightly sealed in a cool, dry place.

Supplement Facts
Serving Size: One Scoop
Servings per Container: 42
  Each Heaping (5.3g) Scoop Contains % Daily Value
Vitamin C (as Ascorbic Acid) 2.35 g 3,917%
Calcium (as Ascorbate reacted from Calcium Carbonate and Ascorbic Acid) 350 mg 35%
Magnesium (as Ascorbate reacted from Magnesium Carbonate and Ascorbic Acid) 350 mg 88%
Potassium (as Ascorbate reacted from Potassium Bicarbonate and Ascorbic Acid) 99 mg 3%
Daily Value (DV)
iHerb Customer Reviews

Powerful antioxidant

Posted by 5511968977392680496 on Dec 23, 2016

This buffered C is great for smoothies. I know that it delivers the vitamins quickly to your system and without loss like so many tablet vitamins. I've been using it for about 7 months and will keep using it.

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Great quality and gentle on the stomach

Posted by 4680988612310580849 on Aug 17, 2016

I can really feel the difference having switched from tablets (a different brand) to the powder. Thorne products are always so reliable, excellent quality. It's much easier to take the buffered C in larger quantities than unbuffered.

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high quality, but...

Posted by 4946749511612296008 on May 26, 2016

...there are more affordable options

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Posted by 4612120995713906551 on May 03, 2016

Great product, love the effervescence. I take it when I'm stressed out or working hard, and an hour or two before bed for a good sleep. I notice a big difference in sleep quality and energy levels without it.

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Thorne Research, Buffered C Powder, 8 oz (227 g)

Posted by Reviewer2485668 on Apr 13, 2016

Not the best tasting but gentle on the stomach

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