Written by the Plenthera team (orthomolecularly trained). Scientifically reviewed in May 2026. Last updated: 28 May 2026.

Algae and green powders are among the most nutrient-dense foods per gram. Chlorella (60% protein, high chlorophyll, iron, B12 analogues), spirulina (a blue-green cyanobacterium with 70% protein and phycocyanin), kelp (iodine-rich), barley grass (chlorophyll, fiber, minerals). Always work with brands that are lab-tested per batch for heavy metals — algae and seaweeds absorb them from their growth environment.

On this pageOur Algae & Greens products · What is the difference between chlorella and spirulina? · Frequently Asked Questions · Combine with · Sources

Our Algae & Greens products

• Chlorella — green freshwater algae with high chlorophyll and protein content
• Spirulina — blue-green algae, 60-70% protein, phycocyanin
• Chlorella + Spirulina Combi — the two combined for the broadest profile
• Algomed — German chlorella specialist with high-quality production
• Big Food Dutch Chlorella — Dutch chlorella production
• Big Food Chlorella + Spirulina Combi — wholefood blend
• Plantforce Chlorella — Dutch organic chlorella supplement
• Seaweed — kelp and other sea-greens for iodine
• Moringa — leaf powder with a broad nutrient profile
• Greens Blends — ready-made mixes of algae, grasses and vegetables

What is the difference between chlorella and spirulina?

Chlorella is a green single-celled freshwater algae with a tough cell wall — which is mechanically broken for digestibility. High in chlorophyll (binds heavy metals, potentially detoxifying) and iron.

Spirulina is technically not an algae but a cyanobacterium. High in protein (60-70%), phycocyanin as a bioactive antioxidant, B vitamins, and iron. Dark blue-green hue, distinctive taste.

Frequently Asked Questions

Does chlorella contain heavy metals?

It can — algae absorb metals from their growth environment. Therefore, always choose a brand with a Certificate-of-Analysis (lab report) per batch. EU limit values for lead, cadmium, mercury, arsenic are respected by the selected brands.

Does chlorella help with detoxification?

Animal studies show that chlorella can bind heavy metals in the gut. Human data is limited but suggestive. For those who regularly eat fish or live in an urban environment, a reasonable wholefood supplement.

Is spirulina a good source of B12?

No. Spirulina contains B12 analogues that are not biologically active for humans. Vegans should take a separate methylcobalamin or cyanocobalamin supplement (Voedingscentrum).

How do I use algae and greens?

Start with 1-3 g per day, build up to 5-10 g. Mix into a smoothie or fruit juice (the taste is pronounced). Preferably on an empty stomach for maximum absorption.

Can I take chlorella during pregnancy?

If in doubt, always consult your doctor or midwife. Always choose a lab-tested brand; avoid algae products without heavy-metal certification.

What is a greens blend?

A ready-made mix of multiple algae, grasses (barley, wheat, alfalfa grass), vegetable powders, and sometimes mushrooms — for those who want the broadest nutrient profile in one scoop.

Combine with other categories

Algae and greens fit broadly into a wholefood approach:

• Superfoods & Mushrooms — the main category
• Greens Blends — for complete mixes
• Proteins & Meal Replacements — to combine greens in shakes
• Minerals — for iodine from seaweeds
• Vitamins & Supplements — for specific supplementation beyond greens

Sources & references

• Voedingscentrum — algae, chlorella, spirulina, B12
• Merchant et al. (2015) — Chlorella for heavy-metal binding (review)
• Karkos et al. (2011) — Spirulina therapeutic potential (Evid Based Complement Altern Med)
• EU limit values lead/cadmium/mercury/arsenic — Regulation (EC) 1881/2006

Disclaimer: This text is intended for informational purposes only and does not replace medical advice. Nutritional supplements are not a substitute for a varied, balanced diet and a healthy lifestyle. Always consult your doctor or an orthomolecular therapist if in doubt.