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Spirulina Powder

Also called arthrospira platensis.

The best price per 3 g and per month across 1 UK retailer, 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.

Prices last checked: 20 October 2026. 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.

Spirulina, Powder: products ranked by price per 3 g
Rank	Product	Per 3 g	Per month	Lasts	Buy	How it is worked out
1	Cheapest per doseVimergySpirulina Powder · 500 g · 166.7 servings · 3 g a servingDetails and price history Add to my stackalso contains zeaxanthin	40p	£11.97	5 months	£66.50View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 500 ÷ 3 per serving = 166.7 In the pack: 166.7 × 3 g = 500 g £66.50 ÷ 500 g × 3 g = 39.9p per 3 g Amount per serving: stated on the label. Also contains: zeaxanthin. The price counts the spirulina only. What the retailer's listing says pack units “500g” units per serving “Serving Size: 1 Scoop (3g)” amount per serving “Spirulina Algae (Arthrospira platensis)(Trichomes) ; 3 g” Is this wrong? Tell us
2	VimergySpirulina Powder · 250 g · 83.3 servings · 3 g a servingDetails and price history Add to my stackalso contains zeaxanthin	41p	£12.42	3 months	£34.50View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 250 ÷ 3 per serving = 83.3 In the pack: 83.3 × 3 g = 250 g £34.50 ÷ 250 g × 3 g = 41.4p per 3 g Amount per serving: stated on the label. Also contains: zeaxanthin. The price counts the spirulina only. What the retailer's listing says pack units “250g” units per serving “Serving Size: 1 Scoop (3g)” amount per serving “Spirulina Algae (Arthrospira platensis)(Trichomes) ; 3 g” Is this wrong? Tell us
3	VimergySpirulina Powder · 135 g · 45 servings · 3 g a servingDetails and price history Add to my stackalso contains zeaxanthin	52p	£15.67	45 days	£23.50View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 135 ÷ 3 per serving = 45 In the pack: 45 × 3 g = 135 g £23.50 ÷ 135 g × 3 g = 52.2p per 3 g Amount per serving: stated on the label. Also contains: zeaxanthin. The price counts the spirulina only. What the retailer's listing says pack units “135g” servings stated “Servings Per Container: About 45” units per serving “Serving Size: 1 Scoop (3g)” amount per serving “Spirulina Algae (Arthrospira platensis)(Trichomes) ; 3 g” Is this wrong? Tell us
4	Blue Spirulina Powder - 1.06 oz · 30 g · 30 servings · 1 g a servingDetails and price history Add to my stackclaimed: vegan	£3.20	£95.97	10 days	£31.99View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind 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 × 1 g = 30 g £31.99 ÷ 30 g × 3 g = £3.20 per 3 g Amount per serving: stated on the label. What the retailer's listing says pack units “Net Wt. 30 Grams” servings stated “Servings Per Container: 30” units per serving “lightly-packed scoop (1g)” amount per serving “Providing 350mg phycocyanin ; 1 g” phycocyanin “Providing 350mg phycocyanin” Is this wrong? Tell us
+	Green Vibrance - 83 Day Supply, Powder - 83 day supply · 83 servings · 565 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains vitamin c, vitamin e, vitamin d3…claimed: vegan	£6.96	£208.71	16 days	£108.75View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 83 (as stated on the label) In the pack: 83 × 565 mg = 46.9 g £108.75 ÷ 46.9 g × 3 g = £6.96 per 3 g Amount per serving: stated on the label. Also contains: vitamin c, vitamin e, vitamin d3, beetroot nitrate, chlorella, cereal grass powders (barley, oat, wheat), grape skin extract, green tea extract, pomegranate extract, chromium nicotinate, selenium, astragalus extract, larch arabinogalactan (resistaid), eleuthero extract, holy basil extract, chicory inulin, burdock root extract, milk thistle extract, dandelion root extract, ginger root powder, digestive enzymes, probiotics (25 billion cfu), folate, iodine, vitamin k, vitamin b12, boron (calcium fructoborate), beta-glucans. The price counts the spirulina only. What the retailer's listing says servings stated “Servings Per Container: About 83” units per serving “Serving Size: 1 scoop (11g)” amount per serving “Spirulina Powder Certified Organic ; 565 mg” Is this wrong? Tell us
+	Green Vibrance - 60 Day Supply, Powder - 60 day supply · 60 servings · 565 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains vitamin c, vitamin d3, vitamin e…claimed: vegan	£7.59	£227.65	11 days	£85.75View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 60 (as stated on the label) In the pack: 60 × 565 mg = 33.9 g £85.75 ÷ 33.9 g × 3 g = £7.59 per 3 g Amount per serving: stated on the label. Also contains: vitamin c, vitamin d3, vitamin e, cereal grass powders (barley, oat, wheat), chlorella, beet root juice powder, grape skin extract, green tea extract, pomegranate extract, chromium nicotinate, selenium, astragalus extract, larch arabinogalactan (resistaid), eleuthero extract, holy basil extract, chicory inulin, burdock root extract, milk thistle extract, dandelion root extract, ginger root powder, digestive enzymes, probiotics (25 billion cfu), folate, iodine, vitamin k, vitamin b12, boron (calcium fructoborate), beta-glucans. The price counts the spirulina only. What the retailer's listing says servings stated “Servings Per Container: About 60” units per serving “Serving Size: 1 scoop (11g)” amount per serving “Spirulina Powder Certified Organic ; 565 mg” Is this wrong? Tell us
+	Activated Charcoal, Chlorella, Spirulina Binder · 60 capsules · 60 servings · 100 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains chlorella, silica, activated charcoal powder (coconut)claimed: vegan	£8.74	£262.35	2 days	£17.49View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind 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 × 100 mg = 6 g £17.49 ÷ 6 g × 3 g = £8.74 per 3 g Amount per serving: stated on the label. Also contains: chlorella, silica, activated charcoal powder (coconut). The price counts the spirulina only. What the retailer's listing says pack units “60 caps” servings stated “60 Servings” units per serving “Serving size: 1 Capsule” amount per serving “Spirulina Powder ; 100mg” Is this wrong? Tell us
+	Green Vibrance 15 Packets - 15 serv · 15 sachets · 15 servings · 600 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains vitamin c, vitamin e, vitamin d3…claimed: vegan	£12.92	£387.50	3 days	£38.75View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 15 ÷ 1 per serving = 15 In the pack: 15 × 600 mg = 9 g £38.75 ÷ 9 g × 3 g = £12.92 per 3 g Amount per serving: stated on the label. Also contains: vitamin c, vitamin e, vitamin d3, barley grass powder, oat grass powder, amla, beet root juice powder, turmeric root powder, camu camu extract, probiotics (12 strains, 25 billion cfu), astragalus extract, vitamin a (beta-carotene), chromium nicotinate, folate, iodine, vitamin k, vitamin b12. The price counts the spirulina only. What the retailer's listing says pack units “15 Packets” servings stated “Servings Per Container: 15” units per serving “Serving Size: 1 packet (11.26g)” amount per serving “Spirulina Powder Certified Organic ; 600 mg” Is this wrong? Tell us
+	Maximum Vibrance Vanilla Multi - Supplement Powder - 15-30 day supply · 15 servings · 942 mg a servingDetails and price history Add to my stackVanillaCombination: price counts the spirulina onlyalso contains multivitamin, protein, vitamin c…claimed: vegan	£13.96	£418.79	5 days	£65.75View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 15 (as stated on the label) In the pack: 15 × 942 mg = 14.1 g £65.75 ÷ 14.1 g × 3 g = £13.96 per 3 g Amount per serving: stated on the label. Also contains: multivitamin, protein, vitamin c, vitamin e, calcium, vitamin b5, potassium, phosphorus, vitamin b6, iron, niacin, zinc, thiamin, riboflavin, vitamin a, vitamin b12, manganese, iodine, folate, selenium, chromium, vitamin k, vitamin d3, biotin, cereal grasses, chlorella, sunflower lecithin, vegetable and fruit powders, haematococcus pluvialis (4mg astaxanthin), lycopene, lutein, curcuminoids 95% extract, elderberry extract, pomegranate extract, cranberry extract, bilberry extract, ginkgo biloba extract, goji berry extract, grape seed extract, grape skin extract, green tea extract, raspberry extract, astragalus extract, beta 1,3-1,6 glucans, larch arabinogalactans (resistaid), eleuthero root extract, holy basil extract, calcium fructoborate (3mg boron), acacia gum fiber, fructooligosaccharides inulin fiber, flaxseed powder, lactobacillus acidophilus. The price counts the spirulina only. What the retailer's listing says servings stated “Servings Per Container: 15” units per serving “2 scoops (40.67g)” amount per serving “Spirulina Powder Certified Organic (BMAA-Free) ; 942 mg” Is this wrong? Tell us
+	Super Greens + Immunity · 150 g · 30 servings · 300 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains vitamin c, chlorella, organic kale powder…	£14.77	£443.00	3 days	£44.30View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 150 ÷ 5 per serving = 30 In the pack: 30 × 300 mg = 9 g £44.30 ÷ 9 g × 3 g = £14.77 per 3 g Amount per serving: stated on the label. Also contains: vitamin c, chlorella, organic kale powder, organic broccoli powder, organic acerola extract, organic spinach powder. The price counts the spirulina only. What the retailer's listing says pack units “150g” servings stated “150g Powder = 30 days supply” units per serving “5g provides on average:” amount per serving “Organic spirulina ; 300mg” Is this wrong? Tell us
+	Sea Moss with Spirulina & Chlorella Liposomal - Limeade - 7.6 oz · 15 servings · 300 mg a servingDetails and price history Add to my stackLimeadeCombination: price counts the spirulina onlyalso contains sea moss, chlorella, dandelion…	£16.33	£489.80	2 days	£24.49View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 15 (as stated on the label) In the pack: 15 × 300 mg = 4.5 g £24.49 ÷ 4.5 g × 3 g = £16.33 per 3 g Amount per serving: stated on the label. Also contains: sea moss, chlorella, dandelion, vitamin e, chlorophyll (as sodium copper chlorophyllin). The price counts the spirulina only. What the retailer's listing says servings stated “Servings Per Container: About 15” units per serving “Serving Size: 1 Tablespoon (15mL)” amount per serving “Organic Spirulina Powder ; 300 mg” Is this wrong? Tell us
+	CleanseMeGP Nutrition · W-Wellness · 56 capsules · 28 servings · 80 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains choline, magnesium, vitamin c…claimed: vegan	£40.38	£1211.38	under a day	£30.15View at W-Wellness (opens in a new tab)Free delivery from £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 56 ÷ 2 per serving = 28 In the pack: 28 × 80 mg = 2.24 g £30.15 ÷ 2.24 g × 3 g = £40.38 per 3 g Amount per serving: stated on the label. Also contains: choline, magnesium, vitamin c, inositol, green tea extract, caffeine, fig powder, artichoke powder, prune extract, l-methionine. The price counts the spirulina only. What the retailer's listing says pack units “56 capsules” servings stated “CONTAINS 28 DAY SUPPLY” units per serving “Per 2 caps” amount per serving “Spirulina Powder 80mg” Is this wrong? Tell us