Stage 1 - Boost your immune system all year long with ESTER-C®

Your immune system helps you stay mentally and physically at your best despite the draining effects of everyday life. Without vitamin C, your immune system cannot support you properly, and the only way to get vitamin C is from food or supplements.

Achieving therapeutic levels of vitamin C can be difficult with food alone and most supplements are nothing more than old-fashioned ascorbic acid which can be hard on your stomach and often poorly absorbed.

Ester-C® is a unique, patented, non-acidic form of vitamin C and the only vitamin C that has been clinically proven in published, human trials to be absorbed into the white blood cells of the immune system and to remain there up to 24 hours! Taking Ester-C® Vitamin C daily is a great way to boost your immune system. Try these Ester-C® products today!

Ester-C® 600mg

Ester-C® 600mg Capsules

  • Easy to swallow, fast-absorbing capsules, ideal for those with poor digestion
  • With Citrus Bioflavonoids for enhanced absorption
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Ester-C® 1000mg

Ester-C® 1000mg Tablets

  • High potency vegetarian tablets so you can take fewer pills
  • Enhanced with Quercetin, bioflavonoids from onion, for even better absorption
  • Citrus free formula for those who have difficulty tolerating citrus fruit
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Ester-C® 500mg

Ester-C® 500mg Chewable

  • Three great tasting, natural flavours: tangy Citrus Punch, sweet Orange and delicious Wildberry
  • Naturally sweetened with stevia, fructose and dextrose
  • Portable and easy to take anywhere, ideal for people who prefer not to swallow pills
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Ester-C® Energy Boost

Ester-C® Energy Boost

Ester-C® Kids

SISU Kids - Ester-C® 250mg Chewable

  • All natural flavours and sweeteners in fun shaped star tabs
  • A less-acidic form of Vitamin C that is gentle on little stomachs and tooth enamel
  • Yummy taste kids love - guaranteed!
  • Three great tasting flavours: tangy Citrus Punch, sweet Orange and delicious Wildberry
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Stage 2 - Reduce your risk during Cold and Flu Season

You will need extra protection to avoid a cold or flu this season because you'll be spending more time indoors with other people, which increases your exposure to cold and flu viruses. You will need to boost your immune system in order to stay healthy. The time to increase your regular daily Ester-C® supplement or to switch to Ester-C® Supreme is while people around you are getting sick.

Ester-C® Supreme

Ester-C® Supreme Capsules

  • Provides potent immune support against allergies, asthma, cold and flu
  • Easy to swallow, fast-absorbing capsules
  • Enhanced with Quercetin, an anti-inflammatory
  • Bioflavonoids from berries make it a citrus-free product
  • Polysaccharides may offer additional immune support during stressful times and the cold & flu season
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Stage 3 - Fight back if you do get sick!

Taking Ester-C® regularly will reduce the chance that viruses will get the better of you, but occasionally a particularly strong virus will slip past your defences. Fortunately, there are natural health products that can reduce the severity of cold or flu symptoms and shorten their duration.

SISU Ester-C® Cold & Flu is the best product for helping combat the flu and will reduce both the severity of your symptoms and the duration of your illness. Keep a bottle on hand so that as soon as you sense the threat of a cold or flu bug - that first tickle in your throat - you can fight back and help your body get rid of the virus in just a few days.

Cold & Flu Rescue with Ester-C®

Cold & Flu Rescue with Ester-C®

"Formulated to help reduce the duration and severity of cold and flu symptoms" - Dr. Serenity Aberdour, ND

  • For the relief of cold and flu symptoms
  • Unique combination of Ester-C®, Echinacea, Andrographis and NAC in an easy to swallow vegetarian capsule
  • Effective without the sedation or other side effects of over the counter drugs
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