Best Vitamin C Tablets in Australia: 8 Products Compared by Price and Evidence (2026)

If you want a simple, effective vitamin C tablet at the lowest cost per serve in Australia, Life Extension Vitamin C 1000mg (250 tablets) at A$29.99 works out to about A$0.12 per serve — the cheapest option we found with a clinical dose.

For a budget Australian pharmacy option, Blackmores Vitamin C 500 Chewable (200 tablets) at Chemist Warehouse costs A$16.99 — that is A$0.085 per serve, though the dose is 500mg rather than 1000mg.

If you want a whole-food form with cofactors, Garden of Life Vitamin Code Raw C (120 capsules) at A$34.99 is the premium pick — fermented with bioflavonoids for enhanced absorption.

Below is a full comparison of 8 products across Australian retailers, plus what the evidence says about forms, doses, and who actually needs supplementation.

Most Australians get enough vitamin C from food. The Australian RDI is 45mg per day for adults — easily achieved with a single orange (about 70mg), a cup of broccoli (80mg), or a capsicum (190mg).

However, supplementation makes sense in specific scenarios:

When supplements may help:

• •Smokers — smoking depletes vitamin C rapidly. The Australian NHMRC recommends smokers get an extra 35mg daily
• •People with limited fruit and vegetable intake — if you consistently eat fewer than 5 serves of produce per day
• •Athletes in heavy training — vitamin C requirements increase with intense exercise, and studies show 200-1000mg daily can reduce exercise-induced immune suppression
• •Iron absorption support — vitamin C significantly enhances non-heme iron absorption, which matters for vegetarians, vegans, and people with low iron
• •Wound healing or recovery from surgery — vitamin C is essential for collagen synthesis
• •Older adults — absorption efficiency decreases with age

When you probably do not need them:

• •You eat a varied diet with regular fruit and vegetables
• •You are taking a general multivitamin that already contains vitamin C
• •You are hoping to "prevent colds" — the evidence for this is weaker than marketing suggests (more on this below)

The evidence-based supplemental dose for immune support is 200-1000mg per day. Doses above 1000mg are not recommended — excess vitamin C is simply excreted in urine, and very high doses (2000mg+) can cause gastrointestinal issues and increase kidney stone risk.

Vitamin C supplementation is one of the most studied interventions in nutrition. Here is what the strongest evidence shows:

For cold prevention (regular supplementation):

A 2013 Cochrane review of 29 trials (11,306 participants) found that regular vitamin C supplementation (200mg+ daily) did not reduce the frequency of colds in the general population. However, it did reduce cold duration by 8% in adults and 14% in children. For people under extreme physical stress (marathon runners, soldiers, skiers), regular supplementation halved cold incidence.

For cold treatment (taking it after symptoms start):

Taking vitamin C after cold symptoms begin has not been shown to significantly reduce duration or severity in most trials. The benefit comes from regular daily supplementation, not mega-dosing when sick.

For immune function:

Vitamin C supports immune function by enhancing neutrophil, lymphocyte, and phagocyte activity. It accumulates in immune cells at concentrations 10-100 times higher than plasma levels, and is rapidly depleted during infections.

For iron absorption:

A systematic review found that 100mg of vitamin C taken with a meal increases non-heme iron absorption by 2-3 fold. This is particularly relevant for Australians on plant-based diets or those with iron deficiency — a common issue, affecting about 12% of Australian women.

For skin and collagen:

A 2017 systematic review of 31 studies found that vitamin C supplementation improved skin hydration, elasticity, and wrinkle appearance — with optimal results at doses of 500-1000mg daily for 8+ weeks. The effect is likely via enhanced collagen synthesis.

Bottom line: Vitamin C is not a cold cure, but regular supplementation at 200-1000mg per day provides measurable benefits for immune resilience, iron absorption, and skin health — particularly for people with suboptimal dietary intake.

Not all vitamin C supplements are the same. Here are the main forms available in Australia:

Ascorbic acid (standard)

The most common and cheapest form. Well-absorbed at doses up to 500mg (about 70-90% bioavailability). Absorption drops at higher single doses — at 1000mg, only about 50% is absorbed. Can cause stomach irritation in sensitive individuals when taken on an empty stomach.

Sodium ascorbate / calcium ascorbate (buffered)

Mineral salts of ascorbic acid with a higher pH. Gentler on the stomach than pure ascorbic acid. Equally well-absorbed. A good choice if you experience digestive discomfort with standard vitamin C. Slightly more expensive per milligram.

Ascorbyl palmitate (fat-soluble)

A fat-soluble form that is sometimes marketed as superior for skin benefits because it can integrate into cell membranes. However, clinical evidence does not show meaningful absorption advantages over ascorbic acid for most purposes. Significantly more expensive.

Liposomal vitamin C

Vitamin C encapsulated in phospholipid spheres (liposomes). Some studies suggest higher bioavailability than standard ascorbic acid, especially at doses above 1000mg. However, liposomal products are 5-10 times more expensive per milligram, and the evidence for clinically meaningful superiority at standard doses (200-1000mg) is limited.

Whole-food vitamin C (e.g., acerola, camu camu)

Vitamin C derived from fruit sources, often paired with naturally occurring bioflavonoids. Proponents argue that cofactors improve absorption. Some evidence suggests bioflavonoids (particularly quercetin and rutin) may slow vitamin C metabolism, keeping blood levels elevated for longer. Garden of Life and MegaFood use this approach. More expensive, but may be preferable for people who want to avoid synthetic supplements.

Our recommendation: For most people, standard ascorbic acid tablets offer the best value. If you have a sensitive stomach, try a buffered form. Liposomal and whole-food forms are fine but rarely justified by the price premium at standard doses.

We compared vitamin C supplements available from Australian retailers, ranked by price per serve:

| Product | Retailer | Dose | Serves | Price (AUD) | Per Serve |

|---------|----------|------|--------|-------------|-----------|

| Blackmores Vitamin C 500 Chewable 200 Tabs | Chemist Warehouse | 500mg | 200 | $16.99 | $0.085 |

| Nature's Way Vitamin C 1000mg 150 Tabs | Chemist Warehouse | 1000mg | 150 | $16.49 | $0.11 |

| Life Extension Vitamin C 1000mg 250 Tabs | Life Extension | 1000mg | 250 | $29.99 | $0.12 |

| NOW Foods Vitamin C-1000 Rose Hips 250 Tabs | iHerb | 1000mg | 250 | $39.18 | $0.16 |

| Thompson's Vitamin C 1000mg 150 Chewable | Aussie Health | 1000mg | 150 | $24.95 | $0.17 |

| Life Extension Vitamin C 1000mg 60 Tabs | Life Extension | 1000mg | 60 | $16.50 | $0.28 |

| Garden of Life Vitamin Code Raw C 120 Caps | Garden of Life | 500mg | 120 | $34.99 | $0.29 |

| Thorne Vitamin C with Flavonoids 90 Caps | Thorne | 500mg | 90 | $28.00 | $0.31 |

Key observations:

• •The cheapest per-serve option is Blackmores at Chemist Warehouse, but at 500mg — you would need two tablets for a 1000mg dose, which brings the real cost to $0.17 per 1000mg serve
• •Life Extension 250-count is the best value at a full 1000mg dose
• •NOW Foods with Rose Hips adds bioflavonoids for enhanced absorption at a modest premium
• •Garden of Life and Thorne are premium options with added cofactors — 2-3 times the cost of basic ascorbic acid
• •Buying larger bottles (150-250 count) saves 40-60% compared to smaller sizes

Note: Chemist Warehouse products (Blackmores, Nature's Way) are currently disabled in our price tracker due to URL changes. Prices shown were last verified March 2026. The remaining products are available through their respective retailers with tracked links.

Best overall value: Life Extension Vitamin C 1000mg (250 tablets) — A$0.12/serve. Pure ascorbic acid with added bio-quercetin for enhanced bioavailability. Good clinical dose, excellent per-serve value, and a reputable brand with third-party testing.

Best budget option: Blackmores Vitamin C 500 Chewable (200 tablets) at Chemist Warehouse — A$0.085/serve. Widely available in-store, TGA-listed, and trusted by Australians for decades. The 500mg dose is sufficient for general wellness and iron absorption support.

Best for iron absorption: Any vitamin C tablet taken with your iron supplement or iron-rich meal. The form does not matter much here — even 100mg of ascorbic acid significantly boosts non-heme iron absorption. If you are taking an iron supplement, simply take your vitamin C at the same time.

Best for sensitive stomachs: Look for a buffered form (sodium ascorbate or calcium ascorbate). NOW Foods makes a buffered C powder available on iHerb. Among the tablets compared above, Thorne Vitamin C with Flavonoids uses a gentler formulation.

Best premium option: Garden of Life Vitamin Code Raw C — whole-food sourced, fermented with probiotics, includes naturally occurring bioflavonoids. At A$0.29/serve it is the most expensive on this list, but it is the only product made from actual food sources rather than synthetic ascorbic acid.

Best for immune season stacking: Combine vitamin C (500-1000mg daily) with zinc (15-30mg) and vitamin D (1000-2000 IU). This three-supplement stack has the strongest evidence base for immune resilience. See our guides on [zinc for colds](/blog/zinc-for-colds-evidence) and [vitamin D in Australia](/blog/vitamin-d-australia-deficiency).

Dose timing: Split doses absorb better than single large doses. Taking 500mg twice daily provides higher sustained blood levels than 1000mg once daily. If convenience matters more, once daily is fine — the difference is modest.

With food or without: Vitamin C is well-absorbed either way, but taking it with food reduces the chance of stomach irritation from ascorbic acid. If you are taking it specifically for iron absorption, take it with your iron-rich meal.

Upper limit: The Australian NHMRC sets the Upper Level of Intake at 2000mg per day. Doses above this can cause diarrhoea, nausea, and may increase kidney stone risk in susceptible individuals. There is no evidence that mega-dosing (5000mg+) provides additional benefits.

Storage: Vitamin C degrades when exposed to light, heat, and moisture. Store tablets in a cool, dry place with the lid tightly sealed. Do not leave bottles in direct sunlight or in the bathroom. Properly stored tablets retain potency for 1-2 years past manufacture.

Interactions to be aware of:

• •Blood thinners (warfarin): High-dose vitamin C (1000mg+) may reduce warfarin effectiveness. Consult your doctor if you take anticoagulants.
• •Chemotherapy: Some oncologists advise against high-dose vitamin C during treatment. Always check with your oncologist.
• •Kidney disease: People with kidney disease should avoid high-dose supplementation as it can increase oxalate levels.
• •Iron overload conditions (haemochromatosis): Vitamin C increases iron absorption, which is harmful if you already have excess iron. Avoid supplementation unless directed by your doctor.

TGA regulation: Vitamin C supplements sold in Australia through pharmacies (Blackmores, Swisse, Nature's Own) are regulated by the Therapeutic Goods Administration under the AUST L system. This means they have been assessed for safety, quality, and have evidence to support low-level health claims. International brands (NOW Foods, Life Extension, Thorne) sold through iHerb are manufactured to US FDA GMP standards but are not individually TGA-listed.

Customs and GST: If ordering vitamin C from iHerb, GST (10%) is charged at checkout for orders under A$1,000. There are no additional customs duties on vitamin supplements imported for personal use.

Climate storage: Australian summers can reach 40°C+, which accelerates vitamin C degradation. If ordering online during summer, consider express shipping and store bottles away from heat immediately. This is especially important for chewable tablets and powders, which are more susceptible to moisture damage than sealed capsules.

Seasonal demand: Vitamin C supplements typically sell out faster during autumn and winter (March-August). If you find a good price on a large bottle, stocking up before cold and flu season can save money — a 250-count bottle at one tablet daily lasts over 8 months.