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Pure EncapsulationsVitamins

Buffered Ascorbic Acid, 90 capsules

£23.18 for 90 capsules at Healf. It carries more than one active ingredient, so it is not ranked against single-ingredient products. Each price below counts one ingredient only.

What it really costs, per 1 g38pOne 1 g dose is our comparison unit for vitamin C. It is not a recommendation.
A day38p
A week£2.69
A month£11.53
A year£140.31

At one 1 g dose a day, this pack lasts 2 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Vitamin C

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 670 mg = 60.3 g
  • £23.18 ÷ 60.3 g × 1 g = 38.4p per 1 g
  • A week 38.4p × 7 = £2.69 · a month × 30 = £11.53 · a year × 365 = £140.31
  • Amount per serving: stated on the label.

Calcium

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 20 mg = 1.8 g
  • £23.18 ÷ 1.8 g × 500 mg = £6.44 per 500 mg calcium
  • A week £6.44 × 7 = £45.07 · a month × 30 = £193.17 · a year × 365 = £2350.19
  • Amount per serving: stated on the label.

Magnesium

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 37 mg = 3.33 g
  • £23.18 ÷ 3.33 g × 100 mg = 69.6p per 100 mg magnesium
  • A week 69.6p × 7 = £4.87 · a month × 30 = £20.88 · a year × 365 = £254.08
  • Amount per serving: stated on the label.

Potassium

  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 20 mg = 1.8 g
  • £23.18 ÷ 1.8 g × 200 mg = £2.58 per 200 mg potassium
  • A week £2.58 × 7 = £18.03 · a month × 30 = £77.27 · a year × 365 = £940.08
  • Amount per serving: stated on the label.

The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.

How it compares: vitamin C

All 113, ranked →
Vitamin C Plus TabletsCheapest per 1 gMyprotein · 1 g a serving · £1.00 a month · a pack lasts 6 months3p£5.99View at Myprotein (opens in a new tab)
Vitamin C Crystals PowderHealf · 1.1 g a serving · £1.01 a month · a pack lasts 7 months3p£7.61View at Healf (opens in a new tab)
Vitamin C PowderLamberts Healthcare (Nature's Best) · 1 g a serving · £1.50 a month · a pack lasts 8 months5p£12.50View at Lamberts Healthcare (opens in a new tab)
This productHealf · 670 mg a serving · £11.53 a month · a pack lasts 2 months38pshown above

Ranked purely by price per 1 g. 950 combination products also contain vitamin C.

How it compares: other forms of calcium

All 25, ranked →
Calcium 1000mg & Vitamin D3 400iu TabletsCheapest per 500 mg calciumSimply Supplements · 1 g a serving · 94p a month · a pack lasts 12 months3p£11.29View at Simply Supplements (opens in a new tab)
Calcium & Magnesium TabletsMyprotein · 800 mg a serving · £2.29 a month · a pack lasts 5 months8p£10.99View at Myprotein (opens in a new tab)
ZipVitCalcium 400mg with Magnesium 200mgZipVit · 400 mg a serving · £2.29 a month · a pack lasts 9 months8p£21.99View at ZipVit (opens in a new tab)
This productHealf · 20 mg a serving · £193.17 a month · a pack lasts 4 days£6.44shown above

Ranked purely by price per 500 mg calcium. 216 combination products also contain calcium.

How it compares: magnesium blends and other forms

All 79, ranked →
ZipVitMagnesium 500mgCheapest per 100 mg magnesiumZipVit · 500 mg a serving · 33p a month · a pack lasts 4.9 years1p£19.99View at ZipVit (opens in a new tab)
Magnesium Glycinate X3Protein Works · 1.81 g a serving · 40p a month · a pack lasts 2.2 years1p£10.99View at Protein Works (opens in a new tab)
Magnesium CapsHealf · 500 mg a serving · 41p a month · a pack lasts 1.4 years1p£6.75View at Healf (opens in a new tab)
This productHealf · 37 mg a serving · £20.88 a month · a pack lasts 33 days70pshown above

Ranked purely by price per 100 mg magnesium. 236 combination products also contain magnesium.

How it compares: other forms of potassium

Compare every product in this form →
Ionic Potassium Liquid ConcentrateCheapest per 200 mg potassiumHealf · 300 mg a serving · £15.60 a month · a pack lasts 38 days52p£19.50View at Healf (opens in a new tab)
Ionic Potassium Liquid ConcentrateMyprotein · 300 mg a serving · £16.00 a month · a pack lasts 38 days53p£20.00View at Myprotein (opens in a new tab)
This productHealf · 20 mg a serving · £77.27 a month · a pack lasts 9 days£2.58shown above

Ranked purely by price per 200 mg potassium. 58 combination products also contain potassium.

On the label

Vitamin C · Standard (ascorbic acid and ascorbates)
670 mg per serving (stated on the label)
Calcium · Other forms
20 mg per serving (stated on the label)
Pack
90 capsules · 90 servings · 1 capsule(s) a serving
Cost per serving
26p (90 servings in the pack)
More label details
Magnesium · Blends and other forms
37 mg per serving (stated on the label)
Potassium · Other forms
20 mg per serving (stated on the label)
Claimed on the listing
vegetarian
Sold by
Healf
What the listing says
“90 caps” · “Serving Size: 1 Capsule” · “Calcium (as Calcium Ascorbate) ; 20 mg”
Ingredients

Vitamin C (as Calcium Ascorbate, Magnesium Ascorbate, and Potassium Ascorbate), Magnesium (as Magnesium Ascorbate), Potassium (as Potassium Ascorbate), Calcium (as Calcium Ascorbate), Vegetarian Capsule (Cellulose, Water), Antioxidant (Ascorbyl Palmitate)

From the Healf listing. Check the pack itself if you have an allergy: labels mark allergens in bold.

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One 1 g dose is our comparison unit, not a recommendation.

Price history

No price change since 1 October 2026. Checked on 20 days, most recently 20 October 2026.

Price at every check
£23.18Healf
First recorded
£23.181 Oct
Checked on
20 dayssince 1 Oct
Pack price at each check.
  1. First checked at Healf: £23.18

Questions about this product

How much does Pure Encapsulations Buffered Ascorbic Acid cost per 500 mg calcium?

£6.44 per 500 mg calcium, from £23.18 for 90 capsules at Healf, checked on 20 October 2026.

How long does one pack last?

4 days at one 500 mg dose. The pack holds 1.8 g in total.

How much does Pure Encapsulations Buffered Ascorbic Acid cost per 100 mg magnesium?

70p per 100 mg magnesium, from £23.18 for 90 capsules at Healf, checked on 20 October 2026.

How long does one pack last?

33 days at one 100 mg dose. The pack holds 3.33 g in total.

How much does Pure Encapsulations Buffered Ascorbic Acid cost per 200 mg potassium?

£2.58 per 200 mg potassium, from £23.18 for 90 capsules at Healf, checked on 20 October 2026.

How long does one pack last?

9 days at one 200 mg dose. The pack holds 1.8 g in total.

How much does Pure Encapsulations Buffered Ascorbic Acid cost per 1 g?

38p per 1 g, from £23.18 for 90 capsules at Healf, checked on 20 October 2026.

How long does one pack last?

2 months at one 1 g dose. The pack holds 60.3 g in total.

About Pure Encapsulations

All 135 Pure Encapsulations products, priced per dose

More from Pure Encapsulations

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