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Spirulina

Also called arthrospira platensis.

The best price per 3 g and per month, form by form, across 5 UK retailers, and where to buy it cheapest. A unit for comparing, not advice.

Comparing spirulina

We count the spirulina a label states per serving, whatever the pack size or the serving size, so every product sits on one scale. Spirulina comes as tablets and powder, and each form has its own table, because someone buying one would not usually take another as a like-for-like substitute. Products that combine spirulina with other ingredients are listed separately, because their price buys more than spirulina. 3 g is our unit for comparing prices, not a dose to take: the label’s directions and a pharmacist decide that.

Spirulina Tablets

Prices last checked: . Ranked purely by price per 3 g — a comparison unit, not a recommendation. We earn commission when you buy through these links; it never affects the order.

Compared at 3,000 mg. Enter the amount you take to see your own costs.

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Spirulina, Tablets: products ranked by price per 3 g
RankProductPer 3 gPer monthLastsBuyHow it is worked out
1
KIKI Health Spirulina
Cheapest per doseSpirulinaHealf · 200 tablets · 200 servings · 500 mg a servingDetails and price historyAdd to my stack
27p£8.1833 days£9.09View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 200 ÷ 1 per serving = 200
  • In the pack: 200 × 500 mg = 100 g
  • £9.09 ÷ 100 g × 3 g = 27.3p per 3 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “200 tabs”
  • units per serving “(500mg per tablet)”
  • amount per serving “100% Spirulina (500mg per tablet)”

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2
KIKI Health Organic Spirulina
Organic SpirulinaMyprotein · 200 tablets · 33.3 servings · 3 g a servingDetails and price historyAdd to my stack
45p£13.4633 days£14.95View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 200 ÷ 6 per serving = 33.3
  • In the pack: 33.3 × 3 g = 100 g
  • £14.95 ÷ 100 g × 3 g = 44.9p per 3 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “200 Tablets”
  • servings stated “Approximate servings per pack: 33”
  • units per serving “6 tablets / 3g”
  • amount per serving “(500mg per tablet)”

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3
Simply Supplements Spirulina Capsules 2000mg
Spirulina Capsules 2000mg60 capsules · 60 servings · 2 g a servingDetails and price historyAdd to my stackTesting claimed on labelclaimed: vegetarian
53p£15.9740 days£21.29View at Simply Supplements (opens in a new tab)Free delivery from £20.00, otherwise £1.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 60 ÷ 1 per serving = 60
  • In the pack: 60 × 2 g = 120 g
  • £21.29 ÷ 120 g × 3 g = 53.2p per 3 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • amount per serving “high-strength Spirulina 2000mg capsules”

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4
WeightWorld Organic Spirulina & Chlorella Capsules
Organic Spirulina & Chlorella CapsulesWeightWorld · 80 servings · 870 mg a servingDetails and price historyAdd to my stackalso contains chlorella
73p£21.9423 days£16.97View at WeightWorld (opens in a new tab)Free delivery over £35.00, otherwise £1.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 80 (as stated on the label)
  • In the pack: 80 × 870 mg = 69.6 g
  • £16.97 ÷ 69.6 g × 3 g = 73.1p per 3 g
  • Amount per serving: stated on the label.
  • Also contains: chlorella. The price counts the spirulina only.
What the retailer's listing says
  • servings stated “Servings per Container: 80”
  • units per serving “Serving Size: 3 Capsules”
  • amount per serving “Organic Spirulina Powder ; 870 mg”

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5
One Nutrition Spirulina 500mg
Spirulina 500mgOne Nutrition · Vitamin Planet · 100 capsules · 100 servings · 500 mg a servingDetails and price historyAdd to my stackclaimed: veganclaimed: vegetarian
£1.04£31.1917 days£17.33View at Vitamin Planet (opens in a new tab)Delivery £3.95AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 100 ÷ 1 per serving = 100
  • In the pack: 100 × 500 mg = 50 g
  • £17.33 ÷ 50 g × 3 g = £1.04 per 3 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “100 Veg Caps”
  • amount per serving “Spirulina 500mg”

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6
Vimergy Spirulina Capsules
VimergySpirulina CapsulesHealf · 180 capsules · 30 servings · 3 g a servingDetails and price historyAdd to my stack
£1.08£32.5030 days£32.50View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 180 ÷ 6 per serving = 30
  • In the pack: 30 × 3 g = 90 g
  • £32.50 ÷ 90 g × 3 g = £1.08 per 3 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “180 Caps”
  • servings stated “Servings Per Container: 30”
  • units per serving “Serving Size: 6 Capsules”
  • amount per serving “Spirulina Algae (Arthrospira platensis) ; 3 g”

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7
Energybits BEAUTYbits Large Bag
BEAUTYbits Large BagEnergybits · Healf · 1000 tablets · 33.3 servings · 7.5 g a servingDetails and price historyAdd to my stack
£1.21£36.183 months£100.50View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 1000 ÷ 30 per serving = 33.3
  • In the pack: 33.3 × 7.5 g = 250 g
  • £100.50 ÷ 250 g × 3 g = £1.21 per 3 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “1000 tabs”
  • servings stated “Servings Per Container: 33”
  • units per serving “Serving Size: 30 tablets”
  • amount per serving “(250 mg per tablet)”

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8
Energybits ® Spirulina - Large Box - 30 pouches
® Spirulina - Large Box - 30 pouchesEnergybits · Healf · 30 sachets · 30 servings · 7.5 g a servingDetails and price historyAdd to my stackclaimed: veganclaimed: gluten-free
£1.33£39.802 months£99.50View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 30 ÷ 1 per serving = 30
  • In the pack: 30 × 7.5 g = 225 g
  • £99.50 ÷ 225 g × 3 g = £1.33 per 3 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “30 pouches”
  • servings stated “Servings Per Container: 30”
  • units per serving “Serving Size: 1 pouch (30tablets)”
  • amount per serving “NET WT. 0.26 OZ (7.5 g)”

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9
Energybits BEAUTYbits® - Small Canister
BEAUTYbits® - Small CanisterEnergybits · Healf · 360 tablets · 12 servings · 7.5 g a servingDetails and price historyAdd to my stack
£3.30£98.9930 days£98.99View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 360 ÷ 30 per serving = 12
  • In the pack: 12 × 7.5 g = 90 g
  • £98.99 ÷ 90 g × 3 g = £3.30 per 3 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “360 tabs”
  • servings stated “Servings Per Container: 12”
  • units per serving “Serving Size: 30 tablets”
  • amount per serving “(250 mg per tablet)”

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By shop

Each shop's spirulina products, with where its cheapest sits in the market.

How we work out these prices

We count the amount of spirulina per serving as stated on the label.

Questions

Where can I buy spirulina cheapest in the UK?

On 20 October 2026, the cheapest spirulina per dose from a UK seller was Spirulina at Healf (27p per 3 g, £8.18 a month). Then Organic Spirulina at Myprotein (45p per 3 g, £13.46 a month) and Spirulina Capsules 2000mg at Simply Supplements (53p per 3 g, £15.97 a month). That is by price per 3 g, across 5 UK retailers and 9 products, with every price checked daily; the table above shows the working for each.

What is the best price per 3 g of spirulina today?

27p per 3 g, for Spirulina at Healf (27p per 3 g, £8.18 a month), on 20 October 2026. The dearest of the 9 products we price is £3.30 per 3 g, and the middle one is £1.04.

How much does spirulina cost per month?

At one 3 g dose a day, the cheapest works out at £8.18 a month, for Spirulina at Healf, on 20 October 2026. Across the 9 products we price it runs from £8.18 to £98.99 a month. A month is 30 days, and the figure follows the dose you enter in the table.

Which spirulina form is cheapest per dose?

On 20 October 2026: tablets from 27p per 3 g (Healf) and powder from 40p per 3 g (Healf). The forms differ in what they contain, so this is a fact about price and not a recommendation of one over another.

How long does a pack of spirulina last?

At one 3 g dose a day, the packs we price last from 17 days to 3 months; the middle one lasts 33 days. Each row says how long its pack lasts at the dose you enter.

What does “per 3 g” mean?

It is the unit we use to put every product on the same scale: the price of 3 g of spirulina, whatever the pack size or serving size. It is a comparison unit, not a recommendation of how much to take. Use the “Your daily dose” box to see costs at the amount you actually take.

Why are the spirulina forms in separate tables?

We only rank products against others of the same form, because someone buying one form would not usually see another as a like-for-like substitute on price. Forms we compare separately: Tablets; Powder.

Why is a product I have seen in the shops missing?

If a retailer’s listing does not let us confirm the amount per serving, the pack size or the form, we do not guess and we do not show the product. It appears once its label has been read and confirmed.

How up to date are the prices?

Prices on this page were last checked on 20 October 2026. Every table shows the date its prices were checked. Always confirm the price on the retailer’s site before buying.

Do retailers pay to appear higher?

No. We earn a commission when you buy through our links, but the order is set only by price per dose. No retailer or brand can pay for position.