Is this the genuine, authentic product?

Yes. It is identical to what you would pay full price for anywhere else, sourced through our authorized supplier relationships.

How is the price below retail?

We buy direct, with nobody in the middle taking a cut, and we sell it for close to what we paid. You see the price privately because you have unlocked the Vault.

How fast does it ship?

Orders placed before 12pm PT are processed the same day and ship within two business days. Shipping is free over $89, and a flat $9.95 under that.

You have 30 days after it arrives to request a return. Product must be unused, in its original packaging, with proof of purchase, and return shipping is paid by you. Find it cheaper anywhere in Canada and we will match the price.

Sisu Sisu - Ester C 500mg - Citrus Punch, 90 chew

Name: Sisu Sisu - Ester C 500mg - Citrus Punch, 90 chew
Brand: Sisu
SKU: sisu-ester-c-500mg-citrus-punch-90-chew-se
Price: 22.98 CAD
Availability: InStock

This Ester-C formula comes in a variety of flavors, including orange, citrus punch, and wildberry, making it the perfect option for adults and children who struggle with swallowing pills. It provides immune support and promotes healthy skin, joints, and vision thanks to its antioxidant-rich composition. With clinically proven results, Ester-C ensures that vitamin C levels in the body remain elevated for up to 24 hours. This superior absorption is achieved through a special process that converts regular vitamin C into the trademarked Ester-C. Plus, this vegan formula contains no dairy, gluten, artificial flavors, sweeteners, or colors. It is also gentle on the stomach and teeth, making it a great choice for those with sensitive digestive systems or concerns about enamel damage.

Price

Regular Canadian retail price: $22.98 CAD. Price Vault members pay below retail on this product. Member pricing is private and shown after a free opt-in, with no membership fee, no minimum order and no subscription.

In stock. Free shipping across Canada on orders over $89, flat $9.95 under that. 30 days to request a return, with return shipping paid by the customer. Ships from Victoria, BC.

See member pricing on Sisu Sisu - Ester C 500mg - Citrus Punch

Why people keep reordering it

Year-round defense: Daily support for a resilient immune response.
Antioxidant support: Helps protect cells from everyday oxidative stress.
Tradition meets research: Time-tested ingredients in clinically informed doses.

Best suited to: adults who gag on capsules, stomachs that burn on plain vitamin c, people eating mostly plant sources of iron.

What the research supports

Each chewable is 500 mg of vitamin C as Ester-C calcium ascorbate, near pH-neutral rather than sour. At one a day, 90 tablets last three months.

Studies use 200 mg or more a day.

Immunity (evidence: strong, from randomized controlled trial, review): White blood cells hold vitamin C at many times the concentration found in blood plasma and need it to work properly, and that internal store runs down when your immune system is active.
Collagen formation (evidence: strong, from randomized controlled trial, review): The two enzymes that build collagen from proline and lysine cannot run without vitamin C, so skin, cartilage and gum tissue cannot cross-link properly when intake falls short.
Iron absorption (evidence: strong, from randomized controlled trial, review): Vitamin C eaten alongside a meal converts plant iron into the form your gut can absorb, multiplying how much of that meal's iron actually gets taken up.
Stomach comfort (evidence: mixed, from randomized crossover trial): Calcium ascorbate sits near neutral pH instead of the sharp acidity of plain ascorbic acid, which is gentler on the stomach lining, though controlled trials show similar blood levels between the two forms.

Read the literature: Immunity on PubMed, Collagen formation on PubMed, Iron absorption on PubMed, Stomach comfort on PubMed.

Is it right for you

Worth it if

Adults who gag on capsules: One chewable covers a full day of vitamin C at 500 mg without swallowing anything.
Stomachs that burn on plain vitamin C: Calcium and sodium ascorbate are buffered salts, so there is no free ascorbic acid arriving on an empty stomach.
People eating mostly plant sources of iron: 500 mg chewed with a meal is far past the 25 to 100 mg needed to meaningfully increase iron absorption from that meal.

Look elsewhere if

Anyone avoiding added sugars: A capsule or a plain sodium ascorbate powder delivers the same buffered 500 mg with no dextrose or fructose behind it.
Someone taking gram level vitamin C daily: At three tablets a day this bottle is gone in a month. Buffered ascorbate powder costs a fraction of this per gram.
A parent dosing a child under four: Food covers vitamin C at that age. If a supplement is wanted, use a children's formula dosed for their weight.

What to expect

You will not feel anything from this, at any dose. The one thing some people notice, usually within a day or two of going to three tablets, is looser stools, which is the standard sign of taking in more vitamin C than the gut absorbs.

How it compares

Compared with plain ascorbic acid chewables: Ascorbic acid is acidic enough to be unpleasant in the mouth and hard on enamel when you chew it. The ascorbate salts here are close to neutral, which is what makes a 500 mg chewable tolerable at all. The tradeoff: You pay considerably more per gram of vitamin C, and the advertised absorption advantage of the Ester-C form over plain ascorbic acid has not held up consistently in head to head plasma testing.

Product details

Active ingredient: Calcium (calcium ascorbate)
Ingredient form: chew
Strength: 500 mg
Servings per container: 90
Suggested use: Adult: Chew 1 to 3 tablets daily or as directed by a health Wellness-Care practitioner. Children’s dosage (4 and up): Chew 1 tablet daily or as directed by a health Wellness-Care practitioner.
Country of manufacture: Canada
Independent testing: independent third-party labs
Certifications: Non-GMO, Made in Canada
Storage: Store in a cool, dry place
Brand: Sisu

How to take it

Adult: Chew 1 to 3 tablets daily or as directed by a health Wellness-Care practitioner. Children’s dosage (4 and up): Chew 1 tablet daily or as directed by a health Wellness-Care practitioner.

Store in a cool, dry place away from direct light.
Keep out of reach of children.
Consult a practitioner if you are pregnant, nursing or on medication.

Ingredients

Each chewable tablet contains

Vitamin Cfrom Ester-C brand calcium ascorbate and sodium ascorbate: 500 mg
Calcium (calcium ascorbate): 22.5 mg

Non-medicinal ingredients

Stevia rebaudiana leaf powder, dextrose, fructose, citric acid, silicon dioxide, guar gum, stearic acid (vegetable), magnesium stearate (vegetable); Wildberry: natural flavours (raspberry, black raspberry); Citrus Punch: natural citrus punch flavour; Orange: natural flavours (orange, citrus punch), natural colours (curcumin, beetroot red).

Free from

Contains no d airy, wheat, gluten, artiﬁcial ﬂavours, artiﬁcial sweeteners or colours

Interactions and cautions

Medications: Some immune botanicals may interact with immunosuppressant medication. Review with your practitioner.
Timing: Separate from medications by 2 to 4 hours unless directed otherwise by a healthcare practitioner.
Pregnancy and breastfeeding: Consult a healthcare practitioner before use if pregnant or breastfeeding.
General: Use only as directed. Discontinue and consult a practitioner if you experience an adverse reaction.

This product is not intended to diagnose, treat, cure or prevent disease. Consult a healthcare practitioner before use. Free certified advisors are available at 1-888-386-1211, Mon to Fri, 9am to 5pm PT.

Questions about Sisu - Ester C 500mg - Citrus Punch

Is this the genuine, authentic product?: Yes. It is identical to what you would pay full price for anywhere else, sourced through our authorized supplier relationships.
How is the price below retail?: We buy direct, with nobody in the middle taking a cut, and we sell it for close to what we paid. You see the price privately because you have unlocked the Vault.
How fast does it ship?: Orders placed before 12pm PT are processed the same day and ship within two business days. Shipping is free over $89, and a flat $9.95 under that.
Can I return it?: You have 30 days after it arrives to request a return. Product must be unused, in its original packaging, with proof of purchase, and return shipping is paid by you. Find it cheaper anywhere in Canada and we will match the price.