
Spirulina is a blue-green algae (Arthrospira) supplement that NASA has called one of the most nutrient-dense foods on the planet. A single serving (10 g) contains up to 60-70% protein, abundant iron (helping prevent anemia), vitamin B12 (especially important for vegans), beta-carotene, and the powerful antioxidant phycocyanin, which gives spirulina its characteristic blue-green color.
Spirulina supports energy levels, strengthens immunity, helps the body detoxify, and may help lower cholesterol. For athletes, spirulina is valuable thanks to its high protein and iron content — iron supports oxygen transport in blood and muscles. For vegans, spirulina is one of the best plant-based sources of vitamin B12 and iron. Available in tablets (easy to dose) and powder (for adding to smoothies). The typical dose is 3-10 g per day.
Both are algae supplements but differ significantly. Spirulina is protein-rich (60-70%) and iron-rich, best for energy and immune support. Chlorella is known for its detoxifying properties — its tough cell wall binds heavy metals and toxins. Chlorella also contains more chlorophyll. For best results, you can take both together.
Yes, spirulina is one of the best supplements for vegans. It contains high plant protein (60-70%), iron, vitamin B12, and all essential amino acids. It helps compensate for nutrients that are difficult to get enough of from a plant-based diet.
The recommended dose is 3-10 g per day. Start with a smaller dose (3 g) and increase gradually. Spirulina powder can be mixed into smoothies, juice, or water. For tablets, follow the dosage on the packaging. Athletes often take 10 g per day.
Spirulina is generally safe. In the first few days, mild bloating or digestive issues may occur, which resolve as the body adapts. People with allergies (especially to algae and seafood) should be cautious. Only buy spirulina from trusted manufacturers, as contaminated products may contain heavy metals.