Currency

Immunity · 4 products Save 21%
The “Win Your Defenses” Stack

The Natural Factors Winter Immunity Bundle

Adults looking for a complete, single-brand seasonal defense routine to support immune resilience, respiratory clearing, and steady daytime energy through the winter months.

$75.99$96.36 bought separately

You save $20.37 on these 4 products

One of each, includedSunVitamin D3+NAC N-Acetyl-L-Cysteine+C extra + quercetin+Active B Complex

Sizes ↓

In stock · ships as one order

Free shipping Anywhere in Canada
Ships in 1–2 business days From Québec
30-day returns Return policy
Why this bundle

Designed to support immunity

The Natural Factors Winter Immunity Bundle brings together 4 full-size products: SunVitamin D3, NAC N-Acetyl-L-Cysteine, C extra + quercetin and Active B Complex. Bought together they cost $75.99, $20.37 less than buying each one separately. Hand-curated by our in-house naturopath.

  • Strengthens daily immune cell defenses with high-potency 2,500 IU Vitamin D3.
  • Supports respiratory health and glutathione antioxidant production with 600 mg NAC.
  • Combines Vitamin C and bioflavonoid Quercetin for synergistic seasonal protection.
  • Maintains steady cellular energy levels during winter stress with active coenzyme B vitamins.

What’s in The Natural Factors Winter Immunity Bundle · 4 full-size products

Natural factors SunVitamin D3, 2,500 IU · 250 tablets
Natural factors

SunVitamin D3

2,500 IU · 250 tablets

Vitamin D is essential for everyone, with individual needs differing. This is why we provide the advantages of vitamin D3 in concentrations...

Natural factors NAC N-Acetyl-L-Cysteine, 600 mg · 180 vegetarian capsules
Natural factors

NAC N-Acetyl-L-Cysteine

600 mg · 180 vegetarian capsules

What do N-acetyl-L-cysteine and glutathione have in common? Both are a part of the body’s antioxidant defence system! While antioxidants like glutathione...

Natural factors C extra + quercetin, 60 caps
Natural factors

C extra + quercetin

60 caps

Supports immune function Contains antioxidants that help protect against free radicals Helps in collagen formation to maintain healthy bones, cartilage, teeth, and...

Natural factors Active B Complex, 60 vegetarian capsules
Natural factors

Active B Complex

60 vegetarian capsules

Aids nutrient metabolism, to support energy production in the body Helps the body form red blood cells and tissues Helps support normal...

Bought one by one
  • SunVitamin D3 $14.39
  • NAC N-Acetyl-L-Cysteine $35.99
  • C extra + quercetin $19.99
  • Active B Complex $25.99

Separately$96.36

Bundle price$75.99

You keep $20.37 · 21%

Today’s prices in CAD, recalculated whenever a price changes.

The Natural Factors Winter Immunity Bundle 4 full-size products · ships as one order
  • Free shipping in Canada
  • 30-day returns
  • Ships in 1–2 business days
Good to know

Before you order

Answers use each product's label and our store policies — nothing more.

What's in The Natural Factors Winter Immunity Bundle?This bundle

The Natural Factors Winter Immunity Bundle contains 4 full-size products: SunVitamin D3 (2,500 IU), NAC N-Acetyl-L-Cysteine (600 mg), C Extra + Quercetin, and BioCoenzymated Active B Complex. Each one is the same product we sell on its own page, with its own label and expiry date.

How should I take NAC and C Extra + Quercetin?This bundle

Per the product labels, NAC is taken with a meal containing protein, and C Extra + Quercetin is taken with food. Consult a health care practitioner before using C Extra + Quercetin beyond 12 weeks, and do not take NAC if you are taking nitroglycerin or antibiotics without medical advice.

Are these the same products you sell individually?

Yes. The bundle contains the same full-size products listed on their own pages, packed together in one order. Each keeps its own label, directions and expiry date.

How is the saving calculated?

We add up the current price of each product in the bundle and compare it with the bundle price. The figure updates on its own whenever a product's price changes.

Can I take all of these products together?

They were selected to be used together. Follow the directions on each label, and ask a health care practitioner before starting if you are pregnant or breastfeeding, take medication, or have a medical condition.

What happens if one product goes out of stock?

A bundle can only be ordered when every product in it is in stock. If one runs out, the bundle shows as sold out until it is back — the other products can still be bought on their own.

4 full-size products · one order

The Natural Factors Winter Immunity Bundle

Save $20.37 against buying each product separately.

$75.99$96.36 Save 21%

Free shipping in Canada · 30-day returns

More bundles

Build on your routine

See all 24 bundles →