The honest answer: spirulina is a food, not a measured supplement, so there's no single required dose. For most people a 2-cube serving (28 g) a day is a great everyday amount. Here's how to think about the right amount for you.
A 2-cube serving (28 g) blended into one smoothie adds about 2 g of complete plant protein, 10% of the Daily Value for iron and a dose of antioxidants — for roughly 10 calories, with no fishy taste. Simple, repeatable, done.
| Amount | Iron | Protein | Calories |
|---|---|---|---|
| 1 cube (14 g) | ~5% DV | 1 g | ~5 |
| 2 cubes (28 g) — a serving | 10% DV | 2 g complete protein | 10 |
| Full tray (140 g, 5 servings) | 50% DV | 11 g | ~50 |
% Daily Value based on an 18 mg/day reference for iron. One ingredient: spirulina and water — Non-GMO Verified, vegan, gluten-free.
Everyday nutrition: start with 2 cubes in a daily smoothie. It's enough to feel like a habit without thinking about it.
Leaning on it for iron or protein: 2 cubes covers 10% DV iron and 2 g protein; step up to 3–4 cubes for a bigger contribution. For iron, blend with vitamin-C-rich fruit to absorb more — see spirulina & iron.
New to spirulina: start with 1 cube for a few days, then move to 2. There's no loading phase — it's food, not medicine.
For most healthy adults, everyday amounts of quality spirulina are well tolerated, and because it's so nutrient-dense there's simply no reason to overdo it. What matters more than quantity is quality: choose a trusted, Non-GMO Verified source grown in controlled, food-grade conditions — as SimpliiGood is. Fresh-frozen also stays flavor-free, so a daily cube is easy to keep up. Learn what spirulina actually does, or try it in a recipe.
A quick note. This is general nutrition information, not medical advice. Spirulina is a food and is not intended to diagnose, treat, cure or prevent any disease. If you're pregnant, nursing, taking medication (such as blood thinners or immune-related medication), or have a condition like PKU, talk to your doctor about the right amount for you.
There's no single required dose — spirulina is a food. A common everyday amount is a 2-cube serving (28 g): about 2 g complete protein, 10% DV iron and antioxidants in one smoothie, for ~10 calories. More adds more nutrition; no need to megadose. Follow your provider's guidance for a specific goal.
A standard serving is 2 cubes (28 g) a day, dropped straight into a smoothie. One cube is a lighter addition; 3–4 cubes is a bigger boost. It's a whole food, so there's no fixed rule.
For most healthy adults, everyday amounts of quality spirulina are well tolerated, and there's no need to overdo it. Choose a Non-GMO Verified source grown in food-grade conditions. If you're pregnant, nursing, on medication or have PKU, ask your doctor about the right amount.
Any time that fits your routine — often a morning or post-workout smoothie. For iron, pair it with vitamin C (blend with orange or berries) and keep it a little apart from tea or coffee.
For most healthy adults, a daily serving is a fine part of a balanced diet — exactly how fresh-frozen cubes are designed to be used. Check with your doctor first if you're pregnant, nursing, on medication or managing a condition.
More in the Spirulina Learning Center, or see the full nutrition breakdown.