Skip to content

Toll Free: 1-866-502-6789 | Canada Post Update!

Use code ‘WINTER10’For 10% OFF

Free Shipping: On all orders $59.99 or more*

Shop By
  • Health Goals
  • Vitamin & Minerals
  • Lifestyle & Fitness
  • Beauty & Personal Care
  • Practitioner Recommended
Flyer & Deals
  • Monthly Specials
  • Flyer
  • What's New
  • Professional Newsletter
  • Clearance Products
Nature's Source Inc
Wish Lists
0
Sign In
Cart
00 items
Nature's Source Inc
  • Health Goals
    Health Goals
    Go to Health Goals
    Diet & Weight Management
    Digestive Health
    Immune Support
    Stress & Mood Support
    Women's Health
    Men's Health
    Kid's Health
    Cough & Cold Support
    Allergy Relief
    Energy & Endurance Support
    Dermal & Skin Care
    Anti Aging
    Nature's Source Inc
  • Vitamin & Minerals
    Vitamin & Minerals
    Go to Vitamin & Minerals
    Zinc Supplements
    Top Collagen Supplements
    Iron & Minerals
    Magnesium
    Allergy Relief
    Bone Health
    Cough & Cold Support
    Digestive Health
    Hormone Support
    Immune Support
    Womens Health
    Vitamin B Supplements
    Nature's Source Inc
  • Lifestyle & Fitness
    Lifestyle & Fitness
    Go to Lifestyle & Fitness
    Diet & Weight Management
    Energy & Endurance Support
    Appetite Control
    Fat Blockers
    Fat Burners-Stimulants Free
    Ketogenic Diet
    Post Workout
    Pre-Workout
    Nature's Source Inc
  • Beauty & Personal Care
    Beauty & Personal Care
    Go to Beauty & Personal Care
    Acne & Blemish Support
    Beauty Supplements
    Dermal & Skin Care
    Eczema Support
    Facial Care
    Hair Care
    Hair, Nails & Skin
    Hair Loss & Thinning
    Mom, Baby & Kids
    Personal Care for Kids
    Nature's Source Inc
  • Practitioner Recommended
    Practitioner Recommended
    Go to Practitioner Recommended
    Pure Encapsulations
    Designs For Health
    Xymogen
    Metagenics
    NFH
    Mediherb
    Canprev
    Genestra
    Genuine Health
    Progressive
    Dr Formulated
    Biomed
    Nature's Source Inc
  • Monthly Specials Monthly Specials
  • Flyer Flyer
  • What's New What's New
  • Clearance Products Clearance Products
Monthly Specials Monthly Specials
Nature's Source Inc
Log in
Cart
00 items
Home Sisu Vitamins & Supplements Online
Sidebar

Categories

Refined By Clear all

115 results
Clear all

    Availability

    Clear all

    Special Deals

    OFF 15%
    Genuine Health Advanced Gut Health Probiotic Women 50 Billion CFU, 30 Veg Caps Online
    Genuine Health Advanced Gut Health Probiotic Women's Daily 50 Billion CFU 30 VCaps - Maintains Natural Balance Of Healthy Gut Bacteria to Support Women's Stress, Gut, Skin, Vaginal, And Immune Health, Nourishing, And Extra-Strength Formula
    1 review
    Genuine Health Advanced Gut Health Probiotic Women 50 billion CFU Genuine Health Advanced Gut Health Probiotic Women's Daily - The same balanced multi-strain formula and targeted delivery as Genuine Health's original probiotic, now formulated to support the unique needs of a womans gut, skin,...
    $38.19 CAD
    $44.99 CAD
    $38.19 CAD
    Unit price
    / per 
    OFF 29%
    Vega One All-In-One Shake Powder 876g
    Vega One All-In-One Shake Powder 876g - Plant-Based Chocolate Flavoured Protein Powder With All Vitamins and Nutrients
    2 reviews
    What are the benefits of Vega All In One Chocolate? The Vega One nutritional shake in chocolate gives you the benefits of protein, fiber, greens and much more, while still tasting great. One scoop of the Vega On plant based protein is full of...
    $49.99 CAD
    $69.99 CAD
    $49.99 CAD
    Unit price
    / per 
    OFF 15%
    Progressive Perfect Probiotic 120 Billion 30 Vegan Capsules
    Queen of the Thrones Organic Golden Castor Oil 500ml - Soothing Massage Oil, Support Liver Detox, Colon Cleansing, Protect Your Skin and Well-Being
    4 reviews
    100% pure USDA certified organic Hexane-free Extra virgin Amber glass bottle
    $19.49 CAD
    $22.99 CAD
    $19.49 CAD
    Unit price
    / per 

    Sisu Vitamins & Supplements Online

    Sisu Vitamins & Supplements Online

    Featured Products

    OFF 17%
    Sisu Orange Ester-C 500mg - 90 Chewable TabletsSisu Orange Ester-C 500mg 90 Chewable Tablets

    Sisu Orange Ester-C 500mg 90 Chewable Tablets

    No reviews
    Sisu Orange Ester-C 500mg is an antioxidant formulated with vitamin C to promote the immune system's function in chewable orange-flavored tablet. The formula is perfect for adults who aren't used to swallowing pills. It helps strengthens capillaries because of its antioxidant properties. In addition,...
    $22.95 CAD
    $27.49 CAD
    $22.95 CAD
    Unit price
    / per 
    Sisu Orange Kids Ester-C 250mg - 120 Chewable TabletsSisu Orange Kids Ester-C 250mg 120 Chewable Tablets

    Sisu Orange Kids Ester-C 250mg 120 Chewable Tablets

    No reviews
    Kids Ester-C 250mg Orange Vegan Dairy Free wheat Free Gluten Free Naturally sweetened Gentler on tooth enamel No Artificial flavours, Artificial Sweeteners Or Colours Ester-C Chewables are a favourful option for children who don’t like swallowing pills. This chewable vitamin C helps strengthen the...
    $24.99 CAD
    $24.99 CAD
    Unit price
    / per 
    OFF 17%
    Sisu Wildberry Flavour Ester-C 500 mg - 90 Chewable TabletsSisu Wildberry Flavour Ester-C 500 mg 90 Chewable Tablets

    Sisu Wildberry Flavour Ester-C 500 mg 90 Chewable Tablets

    No reviews
    Sisu Orange Flavor Ester-C® 500 mg (Chewable Vitamin C) is specially designed children and adults who don’t like swallowing pills. This formula is best suited for both children and adults especially those who don't like swallowing pills. A chewable vitamin C that helps strengthen...
    $22.95 CAD
    $27.49 CAD
    $22.95 CAD
    Unit price
    / per 
    OFF 16%
    Sisu Wildberry Kids Ester-C 250mg - 120 Chewable TabletsSisu Wildberry Kids Ester-C 250mg 120 Chewable Tablets

    Sisu Wildberry Kids Ester-C 250mg 120 Chewable Tablets

    No reviews
    Ester-C® 250 mg Chewable A flavourful Ester-C® option for children and adults who don't like swallowing pills Vegan Gluten free Dairy Free Naturally sweetened Choose from three delicious natural flavours: orange, citrus punch, or wildberry Gentle on tooth enamel Suitable for adults and children...
    $20.95 CAD
    $24.99 CAD
    $20.95 CAD
    Unit price
    / per 
    Filter
    115 results
    20
    • 10
    • 15
    • 20
    • 25
    • 30
    • 50
    Best selling
    • Featured
    • Best selling
    • Alphabetically, A-Z
    • Alphabetically, Z-A
    • Price, low to high
    • Price, high to low
    • Date, old to new
    • Date, new to old
    Sort

    Sort by:

    • Featured
    • Best selling
    • Alphabetically, A-Z
    • Alphabetically, Z-A
    • Price, low to high
    • Price, high to low
    • Date, old to new
    • Date, new to old
    • OFF 20%
      Sisu Vitamin D 1000 IU - 200 Tablets
      Sisu Vitamin D 1000 IU - 200 Tablets
      1 review
      Exposure to sunlight everyday for at least 10-15 minutes is enough to receive various health benefits. The sun loads your body with beneficial hormones and vitamins including Vitamin D. However, not everyone gets the same amount of sunlight especially those who are living in...
      $12.95 CAD
      $16.19 CAD
      $12.95 CAD
      Unit price
      / per 
    • OFF 20%
      Sisu Zinc Citrate 30mg - 90 CapsulesSisu Zinc Citrate 30mg - 90 Capsules
      Sisu Zinc Citrate 30mg - 90 Capsules
      No reviews
      Zinc Citrate Vegan Non GMO Gluten Free Dairy Free Soy Free High-potency zinc Supports immune health Promotes clear skin May help reduce the duration of the common cold Supports the immune system Helps slow the progression of age-related macular degeneration (AMD) in combination with...
      $11.95 CAD
      $14.99 CAD
      $11.95 CAD
      Unit price
      / per 
    • OFF 15%
      Sisu Ester-C 1000mg - 120 TabletsSisu Ester-C 1000mg 120 Tablets
      Sisu Ester-C 1000mg 120 Tablets
      No reviews
      Ester-C® 1000 mg High-potency tablets enhanced with citrus bioflavonoids to help strengthen your immune system Vegan Non GMO Gluten free Dairy Free Soy Free High potency Enhanced with 200 mg citrus bioflavonoids for superior absorption Added rutin, an antioxidant bioflavonoid used for its anti-inflammatory...
      $38.95 CAD
      $45.59 CAD
      $38.95 CAD
      Unit price
      / per 
    • OFF 18%
      Sisu B12 1000mcg (Vitamin Supplement) - 180 TabletsSisu B12 1000mcg (Vitamin Supplement) - 180 Tablets
      Sisu B12 1000mcg (Vitamin Supplement) - 180 Tablets
      1 review
      Vitamin B12 1000 mcg Methylcobalamin Fast-dissolving, sublingual tablet is involved in energy production and supports the production of red blood cells Vegan Non GMO Gluten free Dairy Free Soy Free B12 in its active form methylcobalamin Accelerated absorption Natural taste, unflavoured and unsweetened Natural-tasting,...
      $23.45 CAD
      $28.69 CAD
      $23.45 CAD
      Unit price
      / per 
    • OFF 20%
      Sisu B12 1000mcg (Vitamin Supplement) - 90 TabletsSisu B12 1000mcg (Vitamin Supplement) - 90 Tablets
      Sisu B12 1000mcg (Vitamin Supplement) - 90 Tablets
      No reviews
      Sisu B12 1000mcg (Vitamin Supplement) is formulated with vitamin B12 which aids in the control of the body’s homocysteine levels. The formula can aid the treatment of various disorders such as cardiovascular disease, pregnancy complications, and neurological disorders. In addition, it contains unflavored and...
      $13.95 CAD
      $17.49 CAD
      $13.95 CAD
      Unit price
      / per 
    • OFF 16%
      SiSU Ester-C Energy Boost Orange - 30 packAdditional Image of product label with text Sisu Ester-C EnergyBoost Orange 30pk
      Sisu Ester-C Energy Boost Orange 30 Packets
      1 review
      Sisu Ester-C Energy Boost Orange 30pk Enjoy 24-hour immune support in an energizing, all-natural and non-carbonated drink mix. Single-size serving packets of naturally sweetened and low-calorie Ester-C Energy Boost come in a variety of delicious flavours for on-the-go convenience. Just add to water to...
      $18.95 CAD
      $22.49 CAD
      $18.95 CAD
      Unit price
      / per 
    • OFF 15%
      Sisu Ester-C 600mg - 240 Veg CapsulesSisu Ester-C 600mg 240 Veg Capsules
      Sisu Ester-C 600mg 240 Veg Capsules
      No reviews
      Ester-C® 600 The advanced immune-supporting properties of Ester-C® enhanced with 100 mg of citrus bioflavonoids for superior absorption. An ideal, daily use formula Containing added citrus bioflavonoids for superior absorption, the original Ester-C® 600 formula works to strengthen your immune system, alleviate allergy symptoms,...
      $53.45 CAD
      $63.09 CAD
      $53.45 CAD
      Unit price
      / per 
    • OFF 19% Sold out
      Sisu Coenzyme Q10 - 120 SoftgelsSisu Coenzyme Q10 - 120 Softgels
      Sisu Coenzyme Q10 - 120 Softgels
      No reviews
      Sisu Coenzyme Q10 (Cardiovascular Health) is designed to support muscle and heart strength and slows the development of age-related diseases. This formula is an essential to the production of energy in every cell in the body. A powerful antioxidant that helps support muscle and...
      $34.95 CAD
      $43.09 CAD
      $34.95 CAD
      Unit price
      / per 
      Out Of Stock
      Out Of Stock
    • OFF 14%
      Sisu Citrus-Free Ester-C Supreme - 120 Veg CapsulesSisu Citrus-Free Ester-C Supreme 120 Veg Capsules
      Sisu Citrus-Free Ester-C Supreme 120 Veg Capsules
      No reviews
      Ester-C® Supreme Ester-C® with powerful bioflavonoids and immune-boosting arabinogalactan to help strengthen your immune system and alleviate allergy symptoms. Citrus free Vegan Non GMO Gluten free Dairy Free Soy Free Citrus free Enhanced with immune-boosting arabinogalactan Added antioxidant bioflavonoids from berry fruits Anti-histamine and...
      $41.45 CAD
      $48.09 CAD
      $41.45 CAD
      Unit price
      / per 
    • OFF 14%
      Sisu Ester-C Supreme 210vc
      Sisu Ester-C Supreme 210 Vegan Capsules - Vitamin C Helps to Maintain Immune Function, Reduce Allergy Symptoms
      1 review
      What are the Ester-C benefits? The main function of the Ester-C vitamin C is to make your immune system stronger. Vitamin C is mostly found in fruit and vegetables, but because fruits and vegetables are often processed or cooked, we lose a lot of...
      $65.95 CAD
      $76.89 CAD
      $65.95 CAD
      Unit price
      / per 
    • OFF 20%
      Sisu Selenium Plus - 60 CapsulesSisu Selenium Plus 60 Capsules
      Sisu Selenium Plus 60 Capsules
      1 review
      Selenium Plus A combination of selenium and methionine to support antioxidant and detoxification pathways Non GMO Gluten free Dairy Free Soy Free The most powerful mineral antioxidant Selenium methionine for more rapid absorption Selenium Plus is a powerful mineral antioxidant that supports the body’s...
      $13.95 CAD
      $17.49 CAD
      $13.95 CAD
      Unit price
      / per 
    • Sisu Natural Black Cherry 10mg Liquid Melatonin - 59mlSisu Natural 10mg Liquid Melatonin Black Cherry 59ml
      Sisu Natural 10mg Liquid Melatonin Black Cherry 59ml
      No reviews
      Sisu Natural Black Cherry 10mg Liquid Melatonin is pure and vegan-sourced, enriched with black cherry flavor that contains sleep inducing properties in order to promote rejuvenating sleep. The formula is fir for those with irregular body clocks and sleeping time.It aids individuals enabling them...
      $27.49 CAD
      $27.49 CAD
      Unit price
      / per 
    • OFF 16%
      Sisu Wildberry Ester-C Energy Boost - 30 PacketsSisu Ester-C Energy Boost Wildberry 30 Packets
      Sisu Ester-C Energy Boost Wildberry 30 Packets
      1 review
      Sisu Wildberry Ester-C Energy Boost is enriched with a natural wildberry flavor that promotes immune support while simultaneously boosting the energy. It is a non-carbonated drink mix that allows the growth and repair of body tissues and bones. In addition, it aids in preventing...
      $18.95 CAD
      $22.49 CAD
      $18.95 CAD
      Unit price
      / per 
    • OFF 16%
      Sisu Calcium & Magnesium 2:1 with Vitamin D2 - 180 TabletsSisu Calcium & Magnesium 2:1 with Vitamin D2 - 180 Tablets
      Sisu Calcium & Magnesium 2:1 with Vitamin D2 - 180 Tablets
      No reviews
      High potency calcium citrate and magnesium to help support bone density and prevent bone loss High Dose Calcium Citrate; High-potency formula of calcium citrate, magnesium oxide, and vitamin D2 ideal for those who wish to supply their daily needs with fewer pills. Enhanced Bone...
      $29.45 CAD
      $34.99 CAD
      $29.45 CAD
      Unit price
      / per 
    • OFF 15%
      SISU Ester-C Vitamin C 600 mg 120 vcapImage showing product of Ester-C Vitamin C 600 mg 120 vcap
      Sisu Ester-C Vitamin C 600 mg 120 Veg-Caps
      No reviews
      Ester-C® 600 The advanced immune-supporting properties of Ester-C® enhanced with 100 mg of citrus bioflavonoids for superior absorption. An ideal, daily use formula Vegan Non GMO Gluten free Dairy Free Soy Free Enhanced bioavailability Improved absorption and retention up to 24 hours Non-acidic and...
      $31.95 CAD
      $37.49 CAD
      $31.95 CAD
      Unit price
      / per 
    • Sisu Skin, Hair And Nails - 60 Veg Capsules
      Sisu Skin, Hair And Nails 60 Veg Capsules
      No reviews
      Sisu Sisu Skin, Hair And Nails (Rejuvenation) is designed to promote skin health and rejuvenation. The formula contains natural ingredients including pure hyaluronic acid known as a perfect moisturizer for your skin. This is made with highly purified vegetarian source that is ideal to...
      $43.69 CAD
      $43.69 CAD
      Unit price
      / per 
    • OFF 15% Sold out
      Sisu Zinc Lozenges Lemon Lime 30 Tablets OnlineBuy Sisu Zinc Lozenges Lemon Lime 30 Tablets
      Sisu Zinc Lozenges Lemon-Lime - 30 Tablets
      No reviews
      Zinc Lozenges High-potency zinc in a convenient, great-tasting lemon-lime lozenge Vegan Soy Free Non GMO Dairy Free Gluten free Naturally sweetened Supports immune health Delicious, natural lemon-lime flavour Promotes clear skin and strong hair and nails Naturally sweetened Sisu Zinc Lozenges provide high-potency zinc...
      $16.95 CAD
      $19.99 CAD
      $16.95 CAD
      Unit price
      / per 
      Out Of Stock
      Out Of Stock
    • OFF 16%
      Sisu Supreme Iron-Free Anti-Stress Multivitamin - 120 Veg CapsulesSisu Supreme Iron-Free Anti-Stress Multivitamin 120 Veg Capsules
      Sisu Supreme Iron-Free Anti-Stress Multivitamin 120 Veg Capsules
      No reviews
      Sisu Iron-Free Anti-Stress Multivitamin - 120 Veg Capsules is designed for everyday use to complement diet and promote your best possible health. The formula is a perfect multivitamin for everyday use that can help promote best possible health. It comes in a full complex...
      $37.45 CAD
      $44.39 CAD
      $37.45 CAD
      Unit price
      / per 
    • OFF 15%
      Sisu Magnesium 250mg, 200 Veg Caps OnlineBuy Sisu Magnesium 250mg, 200 Veg Caps
      Sisu Magnesium 250mg 200 Veg Capsules
      No reviews
      Magnesium 250 mg Supports heart function and muscle strength and aids in the prevention of headaches and migraines Vegan Non GMO Gluten free Dairy Free Soy Free 250 mg of elemental magnesium Additional benefits from malic acid Supports heart function and muscle strength Aids...
      $35.95 CAD
      $42.49 CAD
      $35.95 CAD
      Unit price
      / per 
    • Sisu B Calm w- Rhodiola - 120 Veg CapsulesSisu B Calm w- Rhodiola - 120 Veg Capsules
      Sisu B Calm w- Rhodiola - 120 Veg Capsules
      No reviews
      B Calm Full-spectrum B vitamin formula plus rhodiola to support overall health, particularly in people under physical or mental stress Comprehensive B Vitamin Formula; B Calm with Rhodiola contains the full range of energy-supporting B vitamins . Mental & Physical Support; B vitamins calm...
      $66.19 CAD
      $66.19 CAD
      Unit price
      / per 
    Showing 1 -20 of 115 total
    Show More

    Brief Description of Sisu Vitamins & Supplements

    At Sisu, we are committed to helping Canadians find their perfect balance. Our ever-expanding line of natural health products is driven by innovative, clinically-validated ingredients and industry-leading environmental awareness. With our unique, non-GMO formulations, guaranteed potency and purity, patented ingredients like Ester-C®, and 100% recyclable cobalt blue bottles, we have bridged the gap between cutting-edge science and ethical manufacturing. A focus on total wellness of the body, mind and spirit influences everything we do, and is instilled in our very name.

    Frequently Asked Questions About Sisu Vitamins & Supplements 

    What is Ester-C® and how is it different from regular vitamin C?

    Ester-C® is a unique and patented form of calcium ascorbate that is created by buffering ascorbic acid (vitamin C) with calcium. This special formulation provides numerous health benefits, including support for skin, joint, and vision health, cardiovascular support, antioxidant protection, and immune system wellness. Unlike regular vitamin C, Ester-C® is non-acidic and gentle on the stomach.

    Why is Ester-C® considered quick-absorbing and highly bioavailable?

    Ester-C® is better absorbed and more bioavailable compared to regular vitamin C due to the presence of active vitamin C metabolites that are exclusively found in Ester-C®. This unique composition ensures rapid absorption into the bloodstream, allowing for optimal utilization by the body.

    Is Ester-C® gentle on the stomach?

    Yes, Ester-C® is non-acidic and gentle on the digestive system, compared to standard vitamin C, which may cause stomach discomfort or irritation in some individuals. This makes Ester-C® a suitable choice for those with sensitive stomachs or gastrointestinal issues.

    What scientific evidence supports the efficacy of Ester-C®?

    Ester-C® has been extensively studied for decades and is backed by scientific research. Its patented formulation goes through rigorous testing, making it one of the most researched buffered forms of vitamin C available.

    About Us

    • Blogs & Insights
    • About us
    • Terms of Use
    • Privacy Policy
    • Professional Newsletter
    • Careers
    • Contact Us

    Customer Service

    • My Account
    • Wishlist
    • FAQs
    • Refunds/Return Policy
    • Shipping Policy
    • Site Map
    • Clearance Items

    Payment & Shipping

    • Our Locations
    • Payment Methods
    • Shipping Guide
    • Locations We Ship To
    • Estimated Delivery Time
    Nature's Source Inc

    Customer Support: +1-866 502 6789

    Email Us: customercare@natures-source.com

    Nature's Source
    Nature's Signature

    Copyright © 2025 Natures Source, Inc. All rights reserved. Designed and Managed by ScaleUp42.com

    • visa payment
    • mastercard payment
    • Amex payment
    • discover payment
    • jcb payment
    • ball payment
    • Home
    • Search
    • Collection
    • Account
    • Cart
      00 items
    • Choosing a selection results in a full page refresh.

    Thanks for subscribing!

    This email has been registered!

    Shop the look

    Choose Options

    Social

    • Facebook
      Facebook
    • Instagram
      Instagram
    • Twitter
      Twitter
    Edit Option
    this is just a warning
    Product added to Wishlist
    Login
    Forgot your password? Create account
    Shopping Cart
    0 items
    Close
    Search
    Menu Welcome! 
    Sign in Create an Account

    Shop by

    Sign In Create an Account
    My Wish List

    Flyer & Deals

    • Monthly Specials
    • Flyer
    • What's New
    • Professional Newsletter
    • Clearance Products

    Top Searches

    • Top Probiotics Supplements
    • Probiotics and Supplements for Kids
    • Magnesium Supplements
    • Proteins and Fitness Products
    • Best Collagen Supplements
    • Berberine
    • Designs for Health Products