Sisu Sisu - Ester-C 600mg, 240 vcaps
Sisu Ester-C - 600 mg - A patented, non-acidic form of Vitamin C, developed by binding ascorbic acid with a mineral molecule. Ester C enters the blood stream 2 - 6 times faster than regular Vitamin C and cells retain the benefits up to 4 times longer. Vitamin C is a well-known, powerful antioxidant, available through diet or supplementation, essential for boosting immune functions, balancing cholesterol, assisting the absorption of iron, and necessary for the maintenance of healthy bones, teeth, gums, skin and blood vessels.
Price
Regular Canadian retail price: $53.48 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.
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: someone taking vitamin c daily for years, people who find ascorbic acid rough on the stomach, anyone who wants one capsule to be the whole day.
What the research supports
Each capsule is 600 mg of vitamin C as calcium ascorbate, with 100 mg of citrus bioflavonoids. At 240 capsules, one a day lasts about eight 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.
Read the literature: Immunity on PubMed, Collagen formation on PubMed, Iron absorption on PubMed.
Is it right for you
Worth it if
- Someone taking vitamin C daily for years
- 240 capsules at one a day is close to eight months per bottle, which is where a format like this earns its price.
- People who find ascorbic acid rough on the stomach
- Calcium ascorbate is buffered rather than acidic, and the label's instruction to take it with food softens it further.
- Anyone who wants one capsule to be the whole day
- 600 mg in a single capsule means no splitting a dose across two or three tablets.
Look elsewhere if
- Someone sensitive to citrus
- The 100 mg of citrus peel flavonoids here is a real exposure. A citrus free buffered ascorbate gives the same vitamin C without it.
- Anyone taking multiple grams a day
- Buffered ascorbate powder is far cheaper per gram and lets you weigh out 2 or 3 g instead of swallowing five capsules.
- People who struggle to swallow capsules
- A 500 mg buffered chewable covers the same ground and is close to neutral pH, so it is not harsh on teeth.
What to expect
There is nothing to feel, at this dose or any other. If your intake was genuinely low, tissue levels refill over a few weeks without any sensation, and the only common physical signal is looser stools in some people at two capsules a day.
How it compares
- Compared with plain ascorbic acid capsules or powder
- The buffered calcium salt removes the acidity that makes ascorbic acid uncomfortable on an empty stomach, and 100 mg of mixed citrus flavonoids rides along in the same capsule. The tradeoff: You pay a real premium for both. The claim that this form reaches the blood several times faster and stays several times longer has not been reproduced consistently in controlled comparisons, and 100 mg of flavonoids has not been shown to raise vitamin C uptake.
Product details
- Active ingredient
- Calcium (calcium ascorbate)
- Ingredient form
- vcaps
- Strength
- 600 mg
- Servings per container
- 240
- Suggested use
- Take 1-2 capsules daily or a directed by a health care practitioner. Take with food.
- 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
Take 1-2 capsules daily or a directed by a health care practitioner. Take with food.
- 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 vegetarian capsule contains
- Vitamin C (calcium ascorbate) (from Ester-C brand calcium ascorbate)
- 600 mg
- Calcium (calcium ascorbate)
- 72 mg
- Citrus bioflavonoids (fruit peel of lemon (Citrus limon), orange (Citrus sinensis), mandarin (Citrus reticulata), grapefruit (Citrus paradisi))
- 100 mg
Non-medicinal ingredients
Magnesium stearate (vegetable). Capsule shell: Hypromellose.
Free from
Contains no dairy, wheat, gluten, or soy. Non-GMO. Suitable for a vegan diet.
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 600mg
- 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.