Piping Rock Organic Spirulina | 1000mg | 300 Tablets

Our verdict

Piping Rock Organic Spirulina | 1000mg | 300 Tablets works out to $0.03 per serving of spirulina, at 1000mg per serving in tablet form. That puts it the cheapest quarter of the 16 spirulina products we can price per dose, where the typical serving costs $0.09, a Value Index of 2.8 where the median product is 1.0. One container lasts 300 days at the label dose of 1 serving a day, about $1.00 a month. We could not verify a third-party certification for Piping Rock in a public registry. Worked out from the current retail price as of 2026-11-13; confirm the live price on Amazon.com before buying.