Written by the Plenthera team (orthomolecularly trained). Scientifically reviewed in April 2026. Last updated: April 30, 2026.
Chlorella and spirulina are often mentioned in the same breath, but they are two fundamentally different organisms with complementary nutritional profiles. Chlorella — a true green alga with bioactive B12 and the highest chlorophyll content. Spirulina — a cyanobacterium with phycocyanin and exceptionally high protein content. At Plenthera, you'll find the combi-formula with BCW chlorella and certified spirulina. For those who want the complete algae profile without managing two separate products.
Which chlorella + spirulina combi suits you best?
| Form | Best for |
|---|---|
| Tablets 50/50 | On the go, simplicity |
| Powder | Smoothies, flexible dosing |
| With extra B12/iron | Specific vegan supplementation |
| In superfood blend | Broad greens approach |
What is chlorella + spirulina combi?
A chlorella + spirulina combi-formula combines two microalgae — chlorella (Chlorella vulgaris/sorokiniana, a true green alga) and spirulina (Arthrospira platensis, a cyanobacterium). The algae complement each other: chlorella provides chlorophyll and B12, spirulina provides phycocyanin and protein.
The logic behind a combi-formula is that chlorella and spirulina have different strengths. Chlorella, a true green alga, has the highest chlorophyll content of all known foods plus bioactive vitamin B12 — unique among plant-based sources. Spirulina, technically a cyanobacterium, provides the most protein per gram (55-70% dry weight), has phycocyanin as a blue pigment with antioxidant research, and is rich in iron and B vitamins. Together, they deliver a broader nutritional spectrum than either alone.
For those considering the combi, there are two points of attention. First: always choose broken cell wall (BCW) chlorella. Chlorella's hard cell wall must be mechanically or enzymatically broken for absorption — a combi with non-BCW chlorella will largely pass the chlorella component unprocessed through the gastrointestinal tract. Second: the spirulina component must be tested for microcystins (cyanotoxins) and heavy metals — premium brands publish test reports. The NVWA points out the importance of quality control in algae supplements.
The typical dosage of a combi is 3-10 grams of powder per day, or 6-15 tablets of 500 mg. Many users find the combi more practical than two separate products — one jar, one routine. Also check out our chlorella category and spirulina category for the individual products with deeper explanations.
Science, EFSA status, and quality
For the combi-formula as a whole, there are no overarching EFSA claims. However, individual components (chlorophyll, phycocyanin, iron, protein) each have their own recognized EFSA claims when threshold values are met. For iron (>15% RI), the claims for energy and fatigue apply; for protein (12% energy from protein), the claims for muscle mass maintenance and growth apply.
Clinical research on combi-formulas specifically is limited — usually an extrapolation of research on individual algae. For those who want to supplement with maximum evidence-based support: use separate chlorella and spirulina with proven quality markers.
We make no literal claims of efficacy specifically for the combi.
What do chlorella and spirulina each contribute?
Chlorella provides: Highest chlorophyll content of all foods (~140 mg/5g). Biologically active B12 — uniquely plant-based. Cellulose cell wall binding properties. Carotenoids and vitamin K.
Spirulina provides: Highest protein content (55-70% dry). Phycocyanin (blue antioxidant pigment-protein). High iron. Gamma-linolenic acid (GLA). Beta-carotene.
Together they provide: Complete amino acid profile, chlorophyll AND phycocyanin, iron, B vitamins, minerals — a wholefood superfood stack without two separate products.
Ratio: Typically 50/50. For chlorophyll focus, 60/40 in favor of chlorella. For protein focus, 60/40 in favor of spirulina.
The chlorella + spirulina combi forms at Plenthera
Combi tablets (50/50)
Pressed tablets without binders — 100% pure algae in a standard 50/50 ratio. Practical for on-the-go and for those who don't want to mix the green taste.
Combi powder
Deep green powder with fine grain — mixable into smoothies, juices, or water. For flexible dosing.
Combi with extra B12 or iron
Boosted with separate methylcobalamin or extra iron for those seeking specific supplementation for a vegan diet.
Combi in superfood blends
Part of broader green mixtures — often with moringa, barley grass, wheatgrass.
How to use chlorella + spirulina combi?
Simple basic approach for combi:
- Determine form: tablets (on the go, simplicity) or powder (smoothies, flexible).
- Start with recommended low dose — 3-5 g powder per day or 6-10 tablets.
- Gradually increase to 7-10 g per day for broad supplementation.
- Mix powder into a smoothie or juice with a strong flavor to mask the green taste.
- For sports: 5-10 g before or after training.
- With meals for optimal absorption; with food for sensitive stomachs.
- For B12 assurance for vegans: combine with a methylcobalamin supplement.
Myths and misconceptions about chlorella + spirulina combi
Myth 1: "A combi always works better than individual algae."
Not automatically. For specific purposes, individual products may be more effective — more chlorophyll from chlorella alone, more protein from spirulina alone. Combi is practical for a broad approach.
Myth 2: "Combi-formulas cannot contain broken cell wall chlorella."
Incorrect. Premium combi-formulas specifically use BCW chlorella. Ask for BCW notation on the label.
Myth 3: "The B12 in combi makes a vegan B12 supplement unnecessary."
For certainty for vegans, a dedicated methylcobalamin supplement is still recommended. Chlorella B12 is real, but dosage and consistency vary.
Myth 4: "Spirulina + chlorella detox each other."
No clinically proven "mutually reinforcing detox effect". Both have individual mineral-binding properties, but overarching detox claims are not recognized by EFSA.
Combining Chlorella + Spirulina Combi with other supplements
Chlorella + spirulina combi fits into a wholefood-greens stack. Popular combinations:
- Vitamin B12 methylcobalamin: for certainty for vegans.
- Vitamin C: iron absorption synergy with algae iron.
- Moringa: green powder cluster.
- Maca: superfood energy cluster.
- Vegan protein: for those with a protein focus.
- Multivitamin: for broad coverage.
Frequently Asked Questions
What is a chlorella + spirulina combi?
Combination supplement of two microalgae — chlorella and spirulina together.
Why chlorella and spirulina together?
Complementary profiles — chlorella provides chlorophyll and B12, spirulina provides phycocyanin and protein.
How much chlorella + spirulina per day?
3-10 grams total powder, or 6-15 tablets of 500 mg.
What is the best ratio?
Typically 50/50. For chlorophyll focus: more chlorella. For protein focus: more spirulina.
Does a combi work better than individual algae?
More practical for a broad approach. For specific purposes, individual products may be more effective.
Vegan B12 — does the combi work?
Chlorella B12 is real, but for certainty, a methylcobalamin supplement is still recommended.
Which chlorella + spirulina combi is the best?
Broken cell wall chlorella, organic certificate, microcystin test, traceable origin.
Does chlorella + spirulina combi have side effects?
At high doses, stomach discomfort or nausea may occur. Build up gradually.
When to take chlorella + spirulina?
With a meal; flexible timing. Sport: before or after training.
Combi for sports?
Logical for wholefood protein and minerals. Not as a primary protein source — for that, vegan protein is more effective.
Sources
- EFSA Regulation (EU) 432/2012 — claims for components iron, protein (applicable via combi).
- Karkos PD. et al., "Spirulina in clinical practice", Evid Based Complement Alternat Med (2011).
- Merchant RE. & Andre CA., "A review of recent clinical trials of Chlorella pyrenoidosa", Altern Ther Health Med (2001).
- Watanabe F. et al., "Vitamin B12 sources for vegetarians", Nutrients (2014).
Disclaimer: This text is for informational purposes only and does not replace medical advice. Chlorella + Spirulina Combi is a dietary supplement, not a medicine. If in doubt or using medication, we recommend consulting a doctor or orthomolecular therapist first.