Vitamin C is an important antioxidant and plays a key role in immune function, collagen production, and protecting cells from oxidative stress.

The body cannot store large amounts of Vitamin C, and excess Vitamin C is excreted through urine. Therefore, taking regular Vitamin C may not provide continuous support throughout the day.

Sustained Release Vitamin C was developed to slowly and continuously release Vitamin C, helping maintain stable blood Vitamin C levels and allowing the body to use it more effectively.

1. Benefits of Sustained Release Vitamin C

Maintains Blood Vitamin C Levels for Longer 

It helps prevent Vitamin C levels from dropping quickly after a single dose.

Research published in the Journal of Nutritional Science in 2013 found that Sustained Release Vitamin C provided higher and more stable plasma Vitamin C levels compared with regular forms.

Supports Immune Function Continuously 

It is suitable for people who want to support immune function throughout the day.

Supports Skin Health and Continuous Collagen Production 

Collagen in the skin requires a steady supply of Vitamin C to help maintain skin structure and elasticity.

May Reduce the Chance of Diarrhea or Stomach Irritation 

Because it releases slowly, it may reduce the sudden high concentration of Vitamin C in the stomach.

2. Who Should Choose Sustained Release Vitamin C? 

People who work hard or use their brain and body throughout the day.

Older adults who may absorb Vitamin C more slowly.

People who want continuous immune support.

People who care about skin health and want ongoing collagen support.

3. How to Choose and Use It 

Check the daily Vitamin C amount based on your body’s needs. The common amount is 500–1,000 mg/day.

Choose products labeled Sustained Release or Time-Release.

Take it with food or after breakfast to support absorption.

Drink enough water to help Vitamin C circulate throughout the body.

4. Summary

Vitamin C is important for immunity, skin health, and antioxidant protection.

Sustained Release helps the body receive Vitamin C continuously throughout the day.

It is suitable for people who want immune support and skin support in a busy daily lifestyle.

References 

• Levine M, et al. “Vitamin C pharmacokinetics in healthy volunteers: Evidence for a recommended dietary allowance.” Proc Natl Acad Sci USA, 1996.

• Johnston CS, et al. “Sustained-release vitamin C supplementation.” J Nutr Sci, 2013.

• Carr AC, Frei B. “Toward a new recommended dietary allowance for vitamin C based on antioxidant and health effects in humans.” Am J Clin Nutr, 1999.

• Pullar JM, et al. “The roles of vitamin C in skin health.” Nutrients, 2017.

• Hemilä H. “Vitamin C and immune function.” Nutrients, 2017.