The short answer: spirulina is one of the more iron-rich plant foods by weight — a SimpliiGood 2-cube serving gives you 10% of the Daily Value for iron, and a full tray 50%. It's plant (non-heme) iron, so it's absorbed best alongside vitamin C — which the cubes already contain. Here's exactly how much iron spirulina has, how well your body uses it, and how it fits an iron-conscious diet.
Gram for gram, spirulina is among the most iron-dense plant foods there is. Here's what you actually get from SimpliiGood fresh-frozen spirulina, straight from the Nutrition Facts label:
| Amount | Iron | Vitamin C | Protein |
|---|---|---|---|
| Per 2-cube serving (28 g) | 1.9 mg · 10% DV | 8 mg · 9% DV | 2 g complete protein |
| Per tray (140 g, 5 servings) | 9.5 mg · 50% DV | 42 mg · 47% DV | 11 g complete protein |
% Daily Value (DV) based on an 18 mg/day reference for iron. One ingredient: spirulina and water — no fillers. Non-GMO Project Verified, vegan and gluten-free.
The iron in spirulina — like the iron in lentils, tofu and leafy greens — is non-heme iron. Your body absorbs non-heme iron less efficiently than the heme iron in meat. That's not a weakness of spirulina specifically; it's true of every plant source. The good news is that absorption is something you can influence at the table.
Vitamin C is the big lever. Eating vitamin C in the same meal can significantly increase how much non-heme iron your body takes up. This is where fresh-frozen spirulina has a quiet advantage: each serving already brings about 8 mg of vitamin C, and because the cubes are flavor-free you naturally blend them with fruit — orange, mango, berries, kiwi — stacking even more vitamin C into the same glass.
What to keep apart from an iron-rich meal: tea and coffee (tannins), and large calcium doses, can blunt non-heme iron absorption — so enjoy your spirulina smoothie a little apart from your afternoon coffee.
Iron-deficiency anemia happens when the body doesn't have enough iron to make healthy red blood cells, which can leave you tired and run-down. It's a medical condition — it should be diagnosed with a blood test and managed by a healthcare professional, who may recommend dietary changes, supplements, or treatment of an underlying cause.
So where does spirulina fit? Spirulina is a food, not a treatment for anemia. What it can be is a genuinely useful plant source of iron within an iron-conscious diet — especially for people eating vegan or vegetarian, who rely entirely on non-heme iron. A daily 2-cube serving quietly contributes 10% of your iron DV along with complete protein and vitamin C, in something that tastes like a fruit smoothie rather than a supplement.
If you think you may be low in iron or anemic, the right first step is a test and a conversation with your doctor — then spirulina can be one easy, pleasant part of the everyday diet you build around their advice.
A quick, honest note. This article is general education, not medical advice. Iron-deficiency anemia should be diagnosed and managed by a qualified healthcare professional. SimpliiGood spirulina is a food and is not intended to diagnose, treat, cure or prevent any disease. Always talk to your doctor before making changes if you are managing a health condition, are pregnant, or take medication.
The best iron source is the one you'll keep using. Dried spirulina powder is iron-rich too, but its swampy, fishy taste means many jars end up abandoned in the pantry. Fresh-frozen spirulina is virtually flavor-free, pre-portioned into cubes, and frozen within 24 hours of harvest — so the daily habit actually sticks, and the heat-sensitive compounds stay intact. See the full breakdown in fresh vs. powder spirulina, try an iron-friendly blend in our recipes, or find SimpliiGood at a store near you.
SimpliiGood fresh-frozen spirulina provides about 1.9 mg of iron per 2-cube serving (28 g) — 10% of the Daily Value — and about 9.5 mg per tray (50% DV). That makes it one of the more iron-dense plant foods by weight.
Yes. At 10% of the Daily Value per serving, spirulina compares well with many plant foods. Its iron is non-heme (plant) iron, which is absorbed less efficiently than heme iron from meat — so pairing it with vitamin C helps you get more from it.
Spirulina contains non-heme iron, which the body absorbs less readily than animal (heme) iron. Absorption improves with vitamin C. SimpliiGood cubes already contain about 8 mg of vitamin C per serving, and blending them with fruit like orange, mango or berries adds more.
There's no special "iron dose" of spirulina. A 2-cube serving (28 g) contributes about 10% of the Daily Value for iron and fits easily into a daily smoothie. It's food, not a supplement to megadose — if you're managing an iron deficiency, follow the amount your healthcare provider recommends.
They're different tools. An iron supplement gives a concentrated, measured dose and is what clinicians use to correct a diagnosed deficiency. Spirulina is a whole food that contributes iron along with protein and vitamin C. It's not a replacement for a supplement or treatment your doctor has prescribed.
Iron-deficiency anemia is a medical condition that should be diagnosed and managed by a healthcare professional. Spirulina isn't a treatment for anemia — but as a plant source of iron it can be part of an iron-conscious diet. If you suspect you're anemic, see your doctor for testing and a plan.
More questions? See the full spirulina FAQ, compare fresh vs. powder, or find SimpliiGood at a store near you.