Customize Your Shopping Experience!

Please select the destination country, language, and currency you prefer.

Available Shipping Methods
Available Payment Methods
Added to Cart
Combo Discount:
View/Edit Cart Checkout
Cart Total:
Customers Also Bought:

Life Extension, Buffered Vitamin C Powder, 16 oz (454 g)

By Life Extension

Our Price:
You Save:
$0.35 (1%)
  • Volume Discount
  • Buy 4+
    Save 5%
Earn 10% Loyalty Credit ?

This product is already in your Wish List.

View Wish List

This product is now in your Wish List.

In Stock
  • Product Code: LEX-08445
  • UPC Code: 737870084457
  • Package Quantity: 16 oz (454 g)
  • Dimensions: 3 x 3 x 5.8 in, 1.1 lbs (0.5 kg)
Bundle Offer
Save $2.00 when you purchase these items today for only $27.55


Combo Discount:



- $2.00


Product Overview

  • Foundation for Longer Life
  • Vitamin C for Sensitive Stomachs
  • Dietary Supplement

Vitamin C, or ascorbic acid, is a white, crystalline, water-soluble substance found in citrus fruits. As an antioxidant, vitamin C scavenges free radicals in the body and protects tissues from oxidative stress. Vitamin C also promotes the absorption of iron, while preventing its oxidation. Vitamin C is a vital cofactor to the formation of collagen, the connective tissue that supports arterial walls, skin, bones, and teeth. A major immune-supporting activity of vitamin C is boosting glutathione levels in human lymphocytes, cells that make up about 25% of all white cells in the blood.

More vitamin C is contained in the adrenal glands than any other organ in the body and is required at higher levels during times of stress. Physical stresses on the body such as ingestion of heavy metals, cigarette smoking, immune impairment, extreme temperatures, and chronic use of certain medications such as aspirin also signal the need for increased intake of vitamin C.

Vitamin C Powder contains four buffering minerals, in addition to ascorbic acid. When mixed with water, this product produces a reduced-acid solution that is non-irritating to the stomach and intestinal lining. The minerals also make it a more pleasant-tasting and healthful drink. The substances used in this product make it effervesce for a short while when it is mixed with water.

Suggested Use

Read the entire label and follow the directions carefully prior to use.

Mix one (1) teaspoon of Buffered Vitamin C Powder into a glass of water. Wait for the fizz to stop before consuming. The minerals buffer out the normally acidic vitamin C to make a pleasant tasting drink.

Other Ingredients



Density may vary from lot to lot.

To ensure product consistency store tightly closed in a cool, dry place.

Caution: Consuming high doses of this potent product can initially cause diarrhea, especially when taken on an empty stomach. Take with meals starting off low and gradually increasing the dose.

  • Keep out of reach of children.
  • Do not exceed recommended dose.
  • Do not purchase if outer seal is broken or damaged.
  • When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
Visit Manufacturer's Website
Supplement Facts
Serving Size: 1 Rounded Teaspoon (5.4 g)
Servings Per Container: 84
  Amount Per Serving % Daily Value
Vitamin C (as ascorbic acid) 4000 mg 6667%
Calcium (as calcium carbonate) 145 mg 15%
Magnesium (as magnesium carbonate) 55 mg 14%
Zinc (as zinc gluconate) 2 mg 13%
Potassium (as potassium carbonate) 365 mg 10%

iHerb Customer Reviews

5 Stars
4 Stars
3 Stars
2 Stars
1 Stars

I use this daily...

Posted by alloriginal on May 22, 2013

I've taken mega-doses of vitamin c daily for decades. This is my favorite. It is buffered, so it won't cause stomach upset. It is also quite economical, and doesn't taste too bad. Highly recommended. I believe that nutritional supplements saved my life. I've tried a lot of products, and I know what works and what doesn't. My reviews are honest, straighforward, and based on my experience. Read my other reviews to quickly learn from my three decades of research and experimentation.

Was this review helpful to you?

8 people found the following review helpful

So ez c

Posted by Reviewer1573879 on Mar 17, 2009

I like this powder. Put it in my daily water. The ingredients are good, it has a slight fizz to it and no sugar. One teaspoon provides 4,000 mg. of Vitamin C and it doesn't upset my stomach

Was this review helpful to you?

6 people found the following review helpful

Life Extension is correct name

Posted by Reviewer1649711 on May 14, 2009

This powder has definitely improved my quality of life! I use to say that I caught all "bugs" that I heard about or was exposed to. Now, I haven't been sick in over 6 months and it is due to this vitamin C powder. Very easy to take too!

Was this review helpful to you?

6 people found the following review helpful

Best buffered vitamin C available

Posted by Reviewer1999801 on Dec 29, 2009

Pleasant taste compared to other brands and buffering agent though if taking more than 5g per day should probably use sodium ascorbate or look closely at the level of intake of buffering agents.

Was this review helpful to you?

6 people found the following review helpful

Vitamin C powder

Posted by Reviewer1967438 on Jun 29, 2011

Perfect vitamin C powder to mix in cold drinks to stop internal inflammation! Drug free for medical issues since starting on high vitamin C powder...

Was this review helpful to you?

5 people found the following review helpful

See All Reviews