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Spirulina Tablets

Also called arthrospira platensis.

The best price per 3 g and per month 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.

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, Tablets: products ranked by price per 3 g
Rank	Product	Per 3 g	Per month	Lasts	Buy	How it is worked out
1	Cheapest per doseSpirulina · 200 tablets · 200 servings · 500 mg a servingDetails and price history Add to my stack	27p	£8.18	33 days	£9.09View 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: 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)” Is this wrong? Tell us
2	Organic Spirulina · 200 tablets · 33.3 servings · 3 g a servingDetails and price history Add to my stack	45p	£13.46	33 days	£14.95View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind 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)” Is this wrong? Tell us
3	Spirulina Capsules 2000mg60 capsules · 60 servings · 2 g a servingDetails and price history Add to my stackTesting claimed on labelclaimed: vegetarian	53p	£15.97	40 days	£21.29View at Simply Supplements (opens in a new tab)Free delivery from £20.00, otherwise £1.99 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 × 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” Is this wrong? Tell us
4	Organic Spirulina & Chlorella CapsulesWeightWorld · 80 servings · 870 mg a servingDetails and price history Add to my stackalso contains chlorella	73p	£21.94	23 days	£16.97View at WeightWorld (opens in a new tab)Free delivery over £35.00, otherwise £1.99 AmazonFind 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” Is this wrong? Tell us
5	Spirulina 500mgOne Nutrition · Vitamin Planet · 100 capsules · 100 servings · 500 mg a servingDetails and price history Add to my stackclaimed: veganclaimed: vegetarian	£1.04	£31.19	17 days	£17.33View at Vitamin Planet (opens in a new tab)Delivery £3.95 AmazonFind 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” Is this wrong? Tell us
6	VimergySpirulina Capsules · 180 capsules · 30 servings · 3 g a servingDetails and price history Add to my stack	£1.08	£32.50	30 days	£32.50View 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: 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” Is this wrong? Tell us
7	BEAUTYbits Large BagEnergybits · · 1000 tablets · 33.3 servings · 7.5 g a servingDetails and price history Add to my stack	£1.21	£36.18	3 months	£100.50View 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: 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)” Is this wrong? Tell us
8	® Spirulina - Large Box - 30 pouchesEnergybits · · 30 sachets · 30 servings · 7.5 g a servingDetails and price history Add to my stackclaimed: veganclaimed: gluten-free	£1.33	£39.80	2 months	£99.50View 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: 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)” Is this wrong? Tell us
9	BEAUTYbits® - Small CanisterEnergybits · · 360 tablets · 12 servings · 7.5 g a servingDetails and price history Add to my stack	£3.30	£98.99	30 days	£98.99View 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: 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)” Is this wrong? Tell us
+	Zinc 15mg ComplexTerranova · · 100 capsules · 100 servings · 75 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains zinc, stabilised rice bran, pumpkin seed…claimed: vegetarian	£4.40	£131.88	3 days	£10.99View 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: 100 ÷ 1 per serving = 100 In the pack: 100 × 75 mg = 7.5 g £10.99 ÷ 7.5 g × 3 g = £4.40 per 3 g Amount per serving: stated on the label. Also contains: zinc, stabilised rice bran, pumpkin seed, acai berry. The price counts the spirulina only. What the retailer's listing says pack units “100 caps” units per serving “take 1 capsule daily with food” amount per serving “Spirulina ; 75mg” Is this wrong? Tell us
+	Zinc 15mg ComplexTerranova · · 50 capsules · 50 servings · 75 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains zinc, stabilised rice bran, pumpkin seed…claimed: vegetarian	£5.59	£167.76	1 day	£6.99View 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: 50 ÷ 1 per serving = 50 In the pack: 50 × 75 mg = 3.75 g £6.99 ÷ 3.75 g × 3 g = £5.59 per 3 g Amount per serving: stated on the label. Also contains: zinc, stabilised rice bran, pumpkin seed, acai berry. The price counts the spirulina only. What the retailer's listing says pack units “50 caps” units per serving “take 1 capsule daily with food” amount per serving “Spirulina ; 75mg” Is this wrong? Tell us
+	Seamoss with Bladderwrack & SpirulinaFeel Supreme · Vitamin Planet · 60 capsules · 30 servings · 332 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains sea moss, bladderwrack	£6.14	£184.34	3 days	£20.40View at Vitamin Planet (opens in a new tab)Delivery £3.95 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 60 ÷ 2 per serving = 30 In the pack: 30 × 332 mg = 9.96 g £20.40 ÷ 9.96 g × 3 g = £6.14 per 3 g Amount per serving: stated on the label. Also contains: sea moss, bladderwrack. The price counts the spirulina only. What the retailer's listing says pack units “60 Capsules” units per serving “Amount per 2 capsules” amount per serving “Spirulina ; 332mg” Is this wrong? Tell us
+	Vitamin D3 2000iu Vegan ComplexTerranova · · 100 capsules · 100 servings · 75 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains vitamin d3, stabilized rice bran, shiitake…claimed: veganclaimed: vegetarian	£8.00	£239.88	3 days	£19.99View 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: 100 ÷ 1 per serving = 100 In the pack: 100 × 75 mg = 7.5 g £19.99 ÷ 7.5 g × 3 g = £8.00 per 3 g Amount per serving: stated on the label. Also contains: vitamin d3, stabilized rice bran, shiitake, coriander leaf, pumpkin seed. The price counts the spirulina only. What the retailer's listing says pack units “100 caps” units per serving “take 1 capsule daily with food” amount per serving “Spirulina (fresh freeze dried) ; 75mg” Is this wrong? Tell us
+	Vitamin D3 2000iu Vegan ComplexTerranova · · 50 capsules · 50 servings · 75 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains vitamin d3, stabilized rice bran, shiitake…claimed: veganclaimed: vegetarian	£8.79	£263.76	1 day	£10.99View 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: 50 ÷ 1 per serving = 50 In the pack: 50 × 75 mg = 3.75 g £10.99 ÷ 3.75 g × 3 g = £8.79 per 3 g Amount per serving: stated on the label. Also contains: vitamin d3, stabilized rice bran, shiitake, coriander leaf, pumpkin seed. The price counts the spirulina only. What the retailer's listing says pack units “50 caps” units per serving “take 1 capsule daily with food” amount per serving “Spirulina (fresh freeze dried) ; 75mg” Is this wrong? Tell us
+	Living Multinutrient ComplexTerranova · · 100 capsules · 33.3 servings · 200 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains multivitamin, vitamin c, magnesium…claimed: veganclaimed: vegetarian	£11.25	£337.37	2 days	£24.99View 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: 100 ÷ 3 per serving = 33.3 In the pack: 33.3 × 200 mg = 6.67 g £24.99 ÷ 6.67 g × 3 g = £11.25 per 3 g Amount per serving: stated on the label. Also contains: multivitamin, vitamin c, magnesium, vitamin d3, calcium, zinc, curcumin, green barley grass, stabilised rice bran, sea buckthorn, acai, alfalfa, dandelion leaf, nettle leaf, wheat grass juice, green tea leaf, watercress, kale, pomegranate seed, blackberry, black raspberry, vitamin e, choline bitartrate, beta carotene/mixed carotenoids, vitamin b6, pantothenic acid, vitamin b1, vitamin b2, niacinamide, lutein, lycopene, citrus bioflavonoids, inositol, larch arabinogalactan, selenium, boron, copper, iron, manganese, vitamin a, alpha lipoic acid, chromium, folate, iodine, biotin, vitamin b12, vitamin k2. The price counts the spirulina only. What the retailer's listing says pack units “100 caps” units per serving “Three vegetarian capsules typically provide” amount per serving “Spirulina (fresh freeze dried) ; 200mg” Is this wrong? Tell us
+	Living Multinutrient ComplexTerranova · · 50 capsules · 16.7 servings · 200 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains multivitamin, vitamin c, magnesium…claimed: veganclaimed: vegetarian	£13.09	£392.58	1 day	£14.54View 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: 50 ÷ 3 per serving = 16.7 In the pack: 16.7 × 200 mg = 3.33 g £14.54 ÷ 3.33 g × 3 g = £13.09 per 3 g Amount per serving: stated on the label. Also contains: multivitamin, vitamin c, magnesium, vitamin d3, calcium, zinc, curcumin, green barley grass, stabilised rice bran, sea buckthorn, acai, alfalfa, dandelion leaf, nettle leaf, wheat grass juice, green tea leaf, watercress, kale, pomegranate seed, blackberry, black raspberry, vitamin e, choline bitartrate, beta carotene/mixed carotenoids, vitamin b6, pantothenic acid, vitamin b1, vitamin b2, niacinamide, lutein, lycopene, citrus bioflavonoids, inositol, larch arabinogalactan, selenium, boron, copper, iron, manganese, vitamin a, alpha lipoic acid, chromium, folate, iodine, biotin, vitamin b12, vitamin k2. The price counts the spirulina only. What the retailer's listing says pack units “50 caps” units per serving “Three vegetarian capsules typically provide” amount per serving “Spirulina (fresh freeze dried) ; 200mg” Is this wrong? Tell us
+	Bio.Clear Endotox-LV · 90 capsules · 30 servings · 250 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains selenium, dandelion, milk thistle…	£14.90	£447.00	3 days	£37.25View 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: 90 ÷ 3 per serving = 30 In the pack: 30 × 250 mg = 7.5 g £37.25 ÷ 7.5 g × 3 g = £14.90 per 3 g Amount per serving: stated on the label. Also contains: selenium, dandelion, milk thistle, chlorella, burdock root extract 4:1, hibiscus extract 4:1, artichoke extract 4:1 (2.5% cynarin). The price counts the spirulina only. What the retailer's listing says pack units “90 caps” units per serving “Take 3 capsules daily” amount per serving “Spirulina ; 250mg” Is this wrong? Tell us
+	Wildcrafted Sea Moss · 120 capsules · 60 servings · 100 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains sea moss, black pepper, bladderwrack (fucus vesiculosus) 500 mg…claimed: vegan	£15.85	£475.65	2 days	£31.71View 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: 120 ÷ 2 per serving = 60 In the pack: 60 × 100 mg = 6 g £31.71 ÷ 6 g × 3 g = £15.85 per 3 g Amount per serving: stated on the label. Also contains: sea moss, black pepper, bladderwrack (fucus vesiculosus) 500 mg, burdock (arctium lappa) root 400 mg. The price counts the spirulina only. What the retailer's listing says pack units “120 caps” servings stated “Servings Per Container: 60” units per serving “Serving Size: 2 Capsules” amount per serving “Spirulina (Arthrospira platensis; Whole Algae) ; 100 mg” Is this wrong? Tell us
+	Teen Multi · 60 capsules · 60 servings · 5 mg a servingDetails and price history Add to my stackCombination: price counts the spirulina onlyalso contains iron, zinc, choline…claimed: vegan	£207.00	£6210.00	under a day	£20.70View 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 × 5 mg = 300 mg £20.70 ÷ 300 mg × 3 g = £207.00 per 3 g Amount per serving: stated on the label. Also contains: iron, zinc, choline, multivitamin, vitamin c, vitamin e, vitamin b5, broccoli powder, broccoli extract (0.5% sulphurophane), vitamin b6, bamboo extract (silica), vitamin b2, kelp extract (iodine), vitamin b1, niacin, vitamin d3, selenium, beta carotene, vitamin k2, copper, acerola extract, boron, rosemary extract, manganese, chromium, folate, molybdenum, vitamin b12, biotin. The price counts the spirulina only. What the retailer's listing says pack units “60 vegan caps” servings stated “60 capsules = 60 days' supply” units per serving “1 capsule will provide on average” amount per serving “Spirulina (Arthrospira platensis) ; 5mg” Is this wrong? Tell us