Sisu Sisu - Cold & Flu Rescue, 60 vcaps
Sisu Cold & Flu Rescue - Formulated to boost immune health and lessen the severity and duration of cold and flu symptoms. Ester-C, andrographis, NAC (N-acetyl-L-cysteine), and echinacea work together to support lung, respiratory, and immune health. This antioxidant-rich Ester-C formula supports immune health during the immune-challenging months of cold and flu season. Clinical studies show that Ester-C increases vitamin C levels in the body for up to 24 hours. Cold & Flu Rescue with Ester-C is a natural alternative to over-the-counter drugs that simply suppress symptoms.

Price
Regular Canadian retail price: $27.98 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.
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: keeps one bottle in the cupboard for winter, chest feels heavy and congested, stomach objects to plain vitamin c.
What the research supports
A six-capsule daily course built around andrographis and NAC. The bottle covers ten days, the length of a typical course.
Studies use 1,200 mg of NAC a day.
- Sore throat (evidence: moderate, from randomized controlled trial, meta-analysis)
- Andrographis calms the inflammation behind a sore throat and stuffy nose. Taken at the first signs of illness, short trials found it eases symptoms faster than placebo within three to five days.
- Mucus (evidence: moderate, from randomized controlled trial, meta-analysis)
- NAC breaks the chemical bonds that make mucus thick and hard to clear. At the dose used here, studies show it becomes easier to cough up and breathe through.
- Run-down feeling (evidence: moderate, from randomized controlled trial, meta-analysis)
- Gram-level vitamin C taken daily is linked to a shorter stretch of feeling run down during a cold, though the effect is measured in hours rather than days.
Read the literature: Sore throat on PubMed, Mucus on PubMed, Run-down feeling on PubMed.
Is it right for you
Worth it if
- keeps one bottle in the cupboard for winter
- The 10 day course at six capsules a day is exactly how andrographis and echinacea are used, at the first sign rather than year round.
- chest feels heavy and congested
- 1,200 mg of NAC a day is the amount studied for loosening mucus, and it is the ingredient here doing that specific job.
- stomach objects to plain vitamin C
- Calcium ascorbate is pH neutral, which is what makes 1,800 mg a day tolerable when ascorbic acid at that level is not.
Look elsewhere if
- anyone pregnant or trying to conceive
- andrographis is not recommended in pregnancy. Vitamin C and vitamin D on their own are the safer winter choice.
- someone wanting year-round immune support
- the label caps continuous use at 8 weeks. Vitamin D3 through the winter, at 1,000 to 2,000 IU a day, is the daily habit worth having instead.
- someone who wants to act within the first hours
- zinc acetate or gluconate lozenges, dissolved in the mouth every few hours, act locally and faster than anything swallowed.
What to expect
Taken at the first sign at the full six capsules a day, the andrographis trials report a noticeable difference by day 3 to 5, and the NAC usually makes mucus easier to shift within a couple of days. Andrographis is bitter and can cause mild stomach upset, which is why the label says to take it with meals.
How it compares
- Compared with a 1,000 mg vitamin C tablet
- Vitamin C is the smallest part of this. The reason to pay more is the 1,200 mg of NAC and the andrographis, which are the ingredients with short-course human research behind them. The tradeoff: It costs several times more per day than plain vitamin C, and a full bottle only lasts 10 days at the label dose.
- Compared with zinc lozenges
- This works from the inside over several days, with the NAC in particular acting on mucus, which lozenges do nothing for. The tradeoff: Zinc lozenges have the stronger evidence for shortening how long you feel rough, they act in the throat within the first day, and they cost a fraction as much.
Product details
- Medicinal ingredients
- Andrographis (Andrographis paniculata, leaf), N-acetyl-L-cysteine
- Ingredient form
- vcaps
- Servings per container
- 60
- Suggested use
- Take 2 capsules 3 times per day. Take at the first sign of infection. Take with meals. For use beyond 8 weeks, consult a health 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
Take 2 capsules 3 times per day. Take at the first sign of infection. Take with meals. For use beyond 8 weeks, consult a health 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 vegetarian capsule contains
- Andrographis (Andrographis paniculata, leaf)
- 200 mg
- Vitamin C (calcium ascorbate) from Ester-C brand calcium ascorbate
- 300 mg
- Purple coneflower (Echinacea purpurea, herb top and root) (4:1, QCE 240 mg)
- 60 mg
- N-acetyl-L-cysteine
- 200 mg
- Narrow-leaf echinacea (Echinacea angustifolia, root) (4-8:1, QCE 180-360 mg)
- 45 mg
Non-medicinal ingredients
Magnesium stearate (vegetable), maltodextrin. Capsule shell: Hypromellose.
Free from
Contains no dairy or gluten.
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 - Cold & Flu Rescue
- 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.