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For informational purposes only. Always consult a qualified medical professional before taking any supplement, herb, vitamin, mineral, or bioactive, especially if you use medications or have a medical condition. Read the full disclaimer.
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EmergingReviewed

Greens & Superfoods

Chlorella

Concentrated plant, algae, and food powders. This category should describe food composition, not imply a detox or cure effect.

Page last reviewed: 2026-07-23 - next review due: 2027-01-23

Safety Flags

warfarin, allergy, pregnancy/breastfeeding, GI effects

Source Coverage

Included: US reference
Review gap: Canadian reference
Add or verify Health Canada context where an official Canadian reference exists.
Review gap: EU reference
Add or verify EFSA or EU health-claim context where an official EU reference exists.
Included: Clinical / safety source

Function

Green algae providing chlorophyll, protein, carotenoids, and fiber-like cell wall components.

Natural Sources

Chlorella algae.

Food vs Supplement Context

Natural sources describe where this item appears in foods, culinary ingredients, or traditional preparations. Concentrated supplements can differ by dose, extract type, preparation, standardization, and medication context, so they should be evaluated separately.

Testing & Monitoring Context

  • No routine lab test establishes a required daily need for most foods and bioactives; monitoring is usually based on the intended outcome, dose, medical history, and adverse effects.
  • Blood thinner or bleeding-risk context: ask a clinician or pharmacist about INR/bleeding monitoring and surgery timing.

Suggested Guidelines When Purchasing

What to look for: Prefer a product identity that matches the studied ingredient or ordinary food source described on this page.

Use caution or avoid: Avoid casual use when these flags apply: warfarin, allergy, pregnancy/breastfeeding, GI effects.

  • Prefer ordinary food sources first when they provide the intended compound in a practical way.
  • For supplements, require clear labeling of active ingredient, dose per serving, serving size, and other ingredients.
  • Prefer products with third-party testing or transparent contaminant testing, especially for concentrated extracts, algae, mushrooms, minerals, and sports products.
  • Do not let marketing claims override the evidence, safety flags, source coverage, or dose context on this page.

Intake Guidance

No official DRI

No official RDA, AI, or RDI has been established for this bioactive as a required daily intake.

Evidence Summary

Cardiometabolic markers

Emerging

A 2026 systematic review and meta-analysis reported improvements in several cardiometabolic markers in adults with excess weight, but certainty was low to very low and generalizability was limited.

Dose context: No official RDI exists. Chlorella powders, tablets, and extracts should not be treated as equivalent.

Caution: Chlorella can cause GI effects and allergic reactions; vitamin K content may matter for people taking warfarin.

Studies/sources: Chlorella Supplementation, Metabolic Dysfunction, and Oxidative Stress: Systematic Review and Meta-Analysis (2026-07-26), Chlorella (2026-07-26)

Evidence Legend

Established use: Supported by official guidance, regulatory claim context, strong consensus, or repeated human evidence for a specific use.
Promising: Human studies or reviews suggest benefit for specific outcomes, but evidence is not broad enough to treat as settled general guidance.
Emerging: Early human, mechanistic, or mixed evidence; worth tracking, but not strong enough for confident user-facing claims.
Traditional use: Historically or traditionally used, but modern clinical evidence may be limited, mixed, or product-specific.
Category example: Included to describe a supplement or food category, not because a strong health claim is attached yet.

Sources

Chlorella

LactMed / NCBI Bookshelf - acquired 2026-07-26 - Academic Review

FoodData Central

U.S. Department of Agriculture - acquired 2026-07-23 - Food Database