What makes quality spirulina products?
Written by
Tran Quang
Reviewed by
Prof. William Dalton, Ph.D.In order to choose the best quality spirulina, it is important to understand important certification labels and production standards. I rely on products with NSF or USP certification, which ensures purity established through rigorous testing by independent laboratories. Independent testing is essential to avoid any contamination by heavy metals such as mercury or lead, which are often found in products of dubious origin.
Certification Standards
- NSF International certification ensures GMP compliance
- USP verification confirms ingredient purity and potency
- ISO 17025 accredited lab testing for batch consistency
Production Integrity
- Closed-tank cultivation prevents environmental contaminants
- Controlled pH and temperature during growth cycles
- Wild-harvested sources banned due to pollutant risks
Transparency Practices
- Batch-specific heavy metal test reports available online
- Full disclosure of farm location and processing methods
- Clear expiration dates and storage instructions
Third-party testing should show detectable levels of microcystins and heavy metals below the detection limit. Trustworthy brands provide QR codes linked to test results specific to that batch. You should avoid products containing magnesium stearate or silicon dioxide, as these compounds can impede nutrient absorption.
Premium spirulina is a bright blue-green color and smells fresh from the ocean. Brownish colors indicate oxidation. Store in an opaque container shielded from heat. I store mine in the refrigerator to preserve the phycocyanin content. Your investment in quality will produce the best health returns.
Read the full article: 10 Powerful Benefits of Spirulina Powder
