SISU Ester-C Supreme 600mg Buffered Vitamin C Capsules, Calcium Ascorbate with Quercetin

SISU Ester-C Supreme 600mg Buffered Vitamin C Capsules Details

SISU Ester-C Supreme is a buffered vitamin C formula designed to support immune health, antioxidant protection, collagen formation, and overall wellness.

Each 2-capsule serving provides 600 mg of vitamin C from calcium ascorbate, along with arabinogalactan, quercetin, and berry-derived multianthocyanidins for added immune and antioxidant support.

This formula uses Ester-C®, a patented, less acidic form of vitamin C that is designed to be easier on the stomach than regular ascorbic acid.

Best For

• Immune system support
• Buffered vitamin C support
• Antioxidant protection
• Collagen formation
• Skin, gum, cartilage, and connective tissue support
• People who find regular vitamin C too acidic
• Cold and seasonal wellness support
• Adults looking for vitamin C with flavonoid support

SISU Ester-C Supreme vs Regular Vitamin C

• SISU Ester-C Supreme: Provides buffered vitamin C as calcium ascorbate, plus quercetin, arabinogalactan, and berry bioflavonoids for added immune and antioxidant support.
• Regular Vitamin C: Often uses ascorbic acid, which is effective but may be too acidic for some people with sensitive stomachs.

SISU Ester-C Supreme vs Basic Ester-C

• SISU Ester-C Supreme: Combines Ester-C® with additional immune-supportive nutrients, including arabinogalactan, quercetin, and multianthocyanidins.
• Basic Ester-C: Focuses mainly on buffered vitamin C support without the same added antioxidant and immune-support blend.

SISU Ester-C Supreme vs Vitamin C Gummies

• SISU Ester-C Supreme: Provides a more comprehensive capsule formula with buffered vitamin C and added antioxidant cofactors.
• Vitamin C Gummies: May be convenient and pleasant tasting, but often contain added sugars or lower vitamin C amounts per serving.

Supports Immune Health

Vitamin C helps support a healthy immune system and plays an important role in white blood cell function.

SISU Ester-C Supreme also includes arabinogalactan and quercetin, making it a strong option for seasonal immune support.

Buffered and Gentle on the Stomach

Ester-C® is a buffered form of vitamin C made from calcium ascorbate.

Because it is less acidic than regular ascorbic acid, it may be a better choice for people who experience stomach discomfort from standard vitamin C supplements.

Supports Collagen Formation

Vitamin C is essential for collagen production, which supports the structure of skin, gums, cartilage, bones, teeth, and connective tissue.

This makes SISU Ester-C Supreme a useful daily supplement for skin health, tissue repair, and overall structural support.

Antioxidant and Bioflavonoid Support

Vitamin C is a water-soluble antioxidant that helps protect cells from oxidative stress.

This formula also includes quercetin and multianthocyanidins from bilberry, cranberry, black currant, and grape for added antioxidant support.

Includes Quercetin

Quercetin is a bioflavonoid commonly used for antioxidant support and seasonal wellness routines.

Combined with vitamin C, it provides additional support for people looking for a more advanced vitamin C formula.

Includes Arabinogalactan

Arabinogalactan is a plant-derived polysaccharide from larch bark.

It is included in this formula to provide additional immune system support, especially during periods of stress or seasonal immune demand.

What Makes SISU Ester-C Supreme Different?

• Provides 600 mg vitamin C per 2-capsule serving
• Uses buffered calcium ascorbate
• Features patented Ester-C® vitamin C
• Less acidic than regular ascorbic acid
• Includes 100 mg arabinogalactan
• Includes 50 mg quercetin
• Includes 50 mg berry-derived multianthocyanidins
• Supports immune system health
• Supports collagen formation
• Suitable for vegans
• Contains no dairy, wheat, yeast, gluten, soy, or corn

Who Should Choose SISU Ester-C Supreme?

This formula may be ideal for individuals who:

• Want a buffered vitamin C supplement
• Find regular ascorbic acid too acidic
• Want immune support with added cofactors
• Want vitamin C plus quercetin
• Want antioxidant support from berry bioflavonoids
• Are looking for collagen and connective tissue support
• Prefer vegetarian capsules
• Want a vegan-friendly vitamin C formula

SISU Ester-C Supreme Features & Benefits

• Supports immune health: Vitamin C helps maintain healthy immune system function.
• Buffered vitamin C: Ester-C® calcium ascorbate is less acidic and easier on the stomach than regular ascorbic acid.
• Supports collagen production: Vitamin C helps form collagen for skin, cartilage, gums, bones, teeth, and connective tissues.
• Antioxidant protection: Vitamin C, quercetin, and berry anthocyanidins help protect cells from oxidative stress.
• Added immune support: Arabinogalactan provides additional seasonal immune wellness support.
• Vegan-friendly formula: Made with vegetarian capsules and no dairy, wheat, yeast, gluten, soy, or corn.

How To Use

Take 2 capsules daily, or as directed by your healthcare practitioner.

Vitamin C can be taken with or without food, but people with sensitive digestion may prefer taking it with a meal.

Consult a healthcare practitioner before use if you are pregnant or breastfeeding, have a medical condition, are taking medication, have a history of kidney stones, or are following a restricted calcium intake plan.

Compare Similar Products

• Vitamin C Supplements – Compare capsules, powders, chewables, gummies, liposomal vitamin C, buffered vitamin C, and Ester-C formulas.
• Ester-C Supplements – Shop buffered vitamin C formulas designed for immune support and gentle digestion.
• Immune Support Supplements – Explore vitamin C, vitamin D, zinc, elderberry, probiotics, and seasonal wellness formulas.
• Antioxidants – Compare vitamin C, quercetin, CoQ10, green tea, grape seed, astaxanthin, and berry antioxidant formulas.

Pairs Well With

• Vitamin D Supplements
• Zinc Supplements
• Quercetin Supplements
• Probiotics