Short answer: the best vitamin C powder in Canada is pure L-ascorbic acid with nothing added, at a fair price per 100 g. Plant of Life Vitamin C Powder gives you 454 g of 100% L-ascorbic acid for $19.99 CAD. That is $4.40 per 100 g, the lowest price per 100 g of any ascorbic acid powder we found listed in Canada.
Only one powder beat it on sticker price: BulkSupplements' 1 kg bag, shipped from Amazon.com. Once you add its shipping to Canada, the two land at almost the same cost per gram. Details below.
Our pick: Plant of Life Vitamin C Powder
$19.99 CAD for 454 g ($4.40 per 100 g). Buy 2 and save 5%, buy 3 and save 10%. Or subscribe and save 10%, or 15% when you take 3.
- One ingredient: 100% vitamin C as L-ascorbic acid. No additives, sweeteners, preservatives, GMOs or gluten.
- One 2 g scoop a day, so one bag holds about 227 servings.
- Rated 4.9 out of 5 from 19 reviews, backed by a 30-day wellness guarantee.
How we compared
We compared label facts and prices for seven vitamin C powders that Canadians can order today from Amazon.ca, Amazon.com, Well.ca and our own store. Prices were checked October 28, 2026, in Canadian dollars. Price per 100 g is the shelf price divided by the bag size. The serving column is what each label suggests. Anything a brand does not state is marked "not listed."
Ascorbic acid powder in Canada: side by side
| Brand | Size | Price (CAD) | Price per 100 g | Serving on label | Form | Where sold |
|---|---|---|---|---|---|---|
| Plant of Life Vitamin C Powder | 454 g | $19.99 | $4.40 | 2 g (1 scoop) | 100% L-ascorbic acid | plantoflifeco.com |
| BulkSupplements Ascorbic Acid | 1 kg | $32.25 + $11.98 shipping | $3.23 ($4.42 with shipping) | About 1 g (½ tsp) | Ascorbic acid | Amazon.com, ships to Canada |
| Nutricost Vitamin C Powder | 454 g | $26.95 | $5.94 | 1 g (1 scoop) | Ascorbic acid | Amazon.ca |
| NOW Vitamin C Crystals | 454 g | $29.38 | $6.47 | 1.13 g (¼ tsp) | L-ascorbic acid | Amazon.ca |
| Natural Factors Vitamin C Crystals | 500 g | $36.99 | $7.40 | 1,000 mg (¼ tsp) | Ascorbic acid | Amazon.ca |
| Pure Encapsulations Buffered Ascorbic Acid | 227 g | $45.75 | $20.15 | 2.2 g (1 scoop) | Buffered: calcium, magnesium and potassium ascorbate | Amazon.ca |
| Organika Vitamin C Powder | 110 g | $32.46 | $29.51 | 600 mg (⅛ tsp) | Ascorbic acid | Well.ca (no longer available) |
Best overall: Plant of Life Vitamin C Powder
Plant of Life sells a full pound of 100% L-ascorbic acid for $19.99. At $4.40 per 100 g, it costs less per gram than Nutricost, NOW and Natural Factors on Amazon.ca, and a fraction of the buffered and small-jar options.
The label is as short as it gets: vitamin C (L-ascorbic acid), nothing else. One 2 g scoop a day in water or juice, so a bag lasts about 227 days. You can also stir it into creams, lotions and recipes. Pricing is in CAD, shipping is free on orders of $49+, and a 30-day wellness guarantee covers you.
Best bulk buy: BulkSupplements Ascorbic Acid (1 kg)
BulkSupplements has the lowest sticker price per gram in our table: CA$32.25 for a 1 kg bag on Amazon.com, or $3.23 per 100 g. It is single-ingredient ascorbic acid, and the label suggests about 1 g (½ tsp) per serving. The listing shows 9,110 ratings at 4.6 stars.
The catch is getting it here. Amazon.com adds CA$11.98 shipping to Canada, which brings the bag to $4.42 per 100 g, the same as Plant of Life. Buy it if you go through a kilo quickly and want one big bag.
Best seller on Amazon.ca: Nutricost Vitamin C Powder
Nutricost's 454 g tub is $26.95 on Amazon.ca, or $5.94 per 100 g, with 2,167 ratings at 4.7 stars. The label lists vitamin C as ascorbic acid with no added flavours or sweeteners, and the included scoop holds 1 g, so you get 454 servings.
It is a solid pick if you shop Amazon.ca already. You pay about 35% more per gram than Plant of Life for the same one-ingredient powder.
Best-known health store name: NOW Vitamin C Crystals
NOW's Vitamin C Crystals are pure L-ascorbic acid, packaged in Canada by NOW Canada in Guelph, Ontario. The 454 g size is $29.38 on Amazon.ca ($6.47 per 100 g), and each ¼ tsp holds 1.13 g. The listing calls it pharmaceutical grade and lists it as non-GMO, vegan and kosher.
If you want a brand you also see in health food stores, NOW is a safe choice. It costs about 47% more per gram than Plant of Life.
Gentlest option: Pure Encapsulations Buffered Ascorbic Acid
Pure Encapsulations is a powder, but it is not plain ascorbic acid. It is buffered with calcium, magnesium and potassium ascorbate to make a neutral pH vitamin C, which the brand says may be easier on sensitive stomachs. One 2.2 g scoop gives 1,220 mg of vitamin C.
That buffering costs you: $45.75 for 227 g on Amazon.ca, or $20.15 per 100 g. Buy it only if plain ascorbic acid bothers you.
Also worth a look
Natural Factors ($36.99 for 500 g on Amazon.ca) is formulated and packaged in B.C., with 1,000 mg per ¼ tsp. Promise ($24.99 for 450 g, $5.55 per 100 g) is made in Canada with 2,000 mg per ½ tsp. Elo's Premium ($31.95 for 1 lb) is packaged in Toronto.
Organika sold a 110 g jar of pure ascorbic acid on Well.ca for $32.46, but it shows as no longer available, and Organika's own site lists no plain vitamin C powder today.
What to look for when buying
- One ingredient. The label should read ascorbic acid or L-ascorbic acid, and nothing else. No sugar, flavour or fillers.
- Plain or buffered. Sodium ascorbate, calcium ascorbate and "buffered C" are different products, and they cost more per gram.
- Price per 100 g, not sticker price. Bags in our table run from 110 g to 1 kg, so a cheaper sticker can cost more per scoop.
- Grams per serving. Labels range from 600 mg to 2.2 g per serving. Check how many servings you really get.
- The shipping math. A cross-border bag can lose its price edge once shipping is added. Plant of Life ships free on $49+.
Want the background on why people take it? Read our guide to vitamin C powder benefits.
FAQ
Is ascorbic acid the same as vitamin C?
Yes. Ascorbic acid is vitamin C, and L-ascorbic acid is the specific form your body uses and the form found in food. That is why labels say "vitamin C (as ascorbic acid)." Six of the seven powders in our table are plain ascorbic acid. The Pure Encapsulations powder is buffered with mineral ascorbates instead.
What is an L-ascorbic acid supplement?
It is vitamin C in its plain, active form, usually sold as a fine white powder or crystals. A pure powder lets you set your own dose and skip the binders found in many tablets. Plant of Life Vitamin C Powder lists one ingredient: 100% vitamin C as L-ascorbic acid.
What are the benefits of vitamin C powder?
People use vitamin C powder for immune support, antioxidant protection, collagen formation and skin health. Powder is popular because it mixes into water, juice or smoothies, costs less per gram than most tablets and lets you adjust your scoop. Some people also add a pinch to homemade serums and creams.
How much vitamin C powder should I take a day?
Follow your label. Plant of Life suggests one 2 g scoop daily with water and says not to exceed 2 g. Nutricost uses a 1 g scoop, NOW lists 1.13 g per ¼ tsp, and Organika suggests ⅛ tsp (600 mg). Too much at once can upset your stomach, so start small and build up.
Can I use ascorbic acid powder on my skin?
Many people do. Plant of Life notes its powder may be mixed into creams, lotions and other do-it-yourself products, as well as recipes. Mix small, fresh batches, since vitamin C breaks down once it is wet. Keep the bag sealed and dry between uses so the powder stays loose and white.
Ready to try the best overall pick?
Plant of Life Vitamin C Powder is $19.99 CAD for 454 g of 100% L-ascorbic acid, the lowest price per 100 g we found listed in Canada, and it is covered by our 30-day wellness guarantee. New here? Use code WELCOME10 for 10% off your first order, and get free shipping on orders of $49+.
