Sustained Release

ENDUR-C®

1000mg Vitamin C with Rose Hips
ENDUR-C®
ENDUR-C®
ENDUR-C®
ENDUR-C®
ENDUR-C®

Sustained Release

ENDUR-C®
1000mg Vitamin C with Rose Hips


With high-potency antioxidant vitamin C, it supports healthy blood vessel and endothelial function, promoting overall vascular health. 

At-a-Glance

  • Supports the body’s antioxidant defenses*
  • Helps maintain optimal blood vessel function*
  • Promotes immune, skin & nerve health*
  • Provides a gradual, measured release of ascorbic acid over 5 to 7 hours

Product Description

ENDUR-C® 1000mg with Rose Hips (Sustained Release) is ideal for adults who want to fortify the body’s antioxidant defenses and promote optimal immune, skin, and nerve health. People interested in healthy blood vessel function and optimal blood flow can also benefit.* 

ENDUR-C® combines high-potency vitamin C with a unique sustained-release tablet delivery, resulting in a slow and steady release of ascorbic acid over 5 to 7 hours. By releasing small amounts of vitamin C at a time as the tablet travels through the intestine,

 ENDUR-C® allows your body to slowly absorb vitamin C. In this way, it not only helps maintain optimal blood and tissue levels, but avoids excess loss in the urine that is typical of regular forms of high-dose vitamin C.

ENDUR-C® helps minimize digestive upset that some people experience with regular forms of vitamin C.*

ENDUR-C® exerts its antioxidant effect in two ways. Throughout your body, it helps neutralize free radicals that can harm cells, including the endothelial cells that line your blood vessels. These cells play a key role in the ability of blood vessels to relax and promote optimal blood flow. In the blood, it helps recycle and reactivate another antioxidant, vitamin E.*

ENDUR-C® is available in two strengths: 500 mg and 1000 mg.

  • Easy-to-swallow tablets
  • No salt, sugar, starch, preservatives, artificial colors or flavorings
  • Gluten-free
  • Vegan/Vegetarian
  • Free of common allergens (milk, egg, fish, shellfish, tree nuts, peanuts, wheat and soy)

Frequently Asked Questions

What can you expect?

ENDUR-C® is a unique dietary supplement for men and women that delivers powerful antioxidant protection for your body and blood vessels, supports immune function, and promotes skin and nerve health.*

How does it work?

In the body, each tablet dissolves slowly over 5 to 7 hours to release ascorbic acid at the preferred rate for optimal absorption and tissue retention.

How do you take it?

As a dietary supplement for adults, take one (1) tablet daily, preferably with a meal, or as directed by your healthcare provider.

Are there any precautions?

Consult your healthcare professional prior to use if you have or suspect a medical condition, are taking any medications, or are pregnant or nursing. As with all dietary supplements, keep out of reach of children.

What product quality control tests are performed?

ENDUR-C® is manufactured in the United States (Oregon) in a state-of-the-art, FDA-registered facility that meets or exceeds current Good Manufacturing Practices (cGMP). Quality control tests are performed at every stage of the manufacturing process from rigorous raw material testing to finished product testing.


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Providing high-quality
sustained-release supplements
since 1978


Only What You Need

sustained-release

No salt, sugar, starch, artificial colors or flavorings, or preservatives

Easy to Swallow

The shape and size of our tablets make it easy for you to take your supplements

Backed by Science

Backed by a portfolio of
clinical research



With high-potency antioxidant vitamin C, it supports healthy blood vessel and endothelial function, promoting overall vascular health. 

At-a-Glance

  • Supports the body’s antioxidant defenses*
  • Helps maintain optimal blood vessel function*
  • Promotes immune, skin & nerve health*
  • Provides a gradual, measured release of ascorbic acid over 5 to 7 hours

Product Description

ENDUR-C® 1000mg with Rose Hips (Sustained Release) is ideal for adults who want to fortify the body’s antioxidant defenses and promote optimal immune, skin, and nerve health. People interested in healthy blood vessel function and optimal blood flow can also benefit.* 

ENDUR-C® combines high-potency vitamin C with a unique sustained-release tablet delivery, resulting in a slow and steady release of ascorbic acid over 5 to 7 hours. By releasing small amounts of vitamin C at a time as the tablet travels through the intestine,

 ENDUR-C® allows your body to slowly absorb vitamin C. In this way, it not only helps maintain optimal blood and tissue levels, but avoids excess loss in the urine that is typical of regular forms of high-dose vitamin C.

ENDUR-C® helps minimize digestive upset that some people experience with regular forms of vitamin C.*

ENDUR-C® exerts its antioxidant effect in two ways. Throughout your body, it helps neutralize free radicals that can harm cells, including the endothelial cells that line your blood vessels. These cells play a key role in the ability of blood vessels to relax and promote optimal blood flow. In the blood, it helps recycle and reactivate another antioxidant, vitamin E.*

ENDUR-C® is available in two strengths: 500 mg and 1000 mg.

  • Easy-to-swallow tablets
  • No salt, sugar, starch, preservatives, artificial colors or flavorings
  • Gluten-free
  • Vegan/Vegetarian
  • Free of common allergens (milk, egg, fish, shellfish, tree nuts, peanuts, wheat and soy)

Frequently Asked Questions

What can you expect?

ENDUR-C® is a unique dietary supplement for men and women that delivers powerful antioxidant protection for your body and blood vessels, supports immune function, and promotes skin and nerve health.*

How does it work?

In the body, each tablet dissolves slowly over 5 to 7 hours to release ascorbic acid at the preferred rate for optimal absorption and tissue retention.

How do you take it?

As a dietary supplement for adults, take one (1) tablet daily, preferably with a meal, or as directed by your healthcare provider.

Are there any precautions?

Consult your healthcare professional prior to use if you have or suspect a medical condition, are taking any medications, or are pregnant or nursing. As with all dietary supplements, keep out of reach of children.

What product quality control tests are performed?

ENDUR-C® is manufactured in the United States (Oregon) in a state-of-the-art, FDA-registered facility that meets or exceeds current Good Manufacturing Practices (cGMP). Quality control tests are performed at every stage of the manufacturing process from rigorous raw material testing to finished product testing.

Sustained-Release that Lasts All Day

Phase 1
Phase 2
Phase 3
Phase 4
Phase 5
  • 1st Hour
  • 2nd Hour
  • 3rd Hour
  • 4th Hour
  • 5th Hour
  • 6th Hour


Long Lasting

sustained-release

Releases over time for optimal absorption

Saves You Money

sustained-release

More absorption
= less waste

Inspired by Your Body

sustained-release

Mimics how your body naturally processes food

Reduces Side Effects

sustained-release

Gentle and
gradual release



extended-release

Customer Reviews

Based on 45 reviews
98%
(44)
0%
(0)
2%
(1)
0%
(0)
0%
(0)
S
Scott & Tracy GALAIDA
Always feel Endurance products are high quality

After our cardiologist recommended your company years ago we look on your website first for vitamins and supplements to purchase. I always feel we are getting a high-quality product. We have used many ~Bravo!

C
CURT LUCK

ENDUR-C®

m
mark holochak

ENDUR-C® 1000mg Vitamin C with Rose Hips

B
Bill Mahaffey
great company

Been buying their products for many year with NO disapointments.

M
Mary Brewer
Great!

I’ve been feeling so much better.

Customer Reviews

Based on 45 reviews
98%
(44)
0%
(0)
2%
(1)
0%
(0)
0%
(0)
S
Scott & Tracy GALAIDA
Always feel Endurance products are high quality

After our cardiologist recommended your company years ago we look on your website first for vitamins and supplements to purchase. I always feel we are getting a high-quality product. We have used many ~Bravo!

C
CURT LUCK

ENDUR-C®

m
mark holochak

ENDUR-C® 1000mg Vitamin C with Rose Hips

B
Bill Mahaffey
great company

Been buying their products for many year with NO disapointments.

M
Mary Brewer
Great!

I’ve been feeling so much better.