Are Microalgae Supplements the Same as Algae Supplements?

Microalgae are tiny, photosynthetic organisms that people use as nutrient-dense whole foods. If you’ve heard of spirulina or chlorella, those are microalgae.

What is Microalgae?

Microalgae are microscopic, single-celled algae found in fresh or salt water. They photosynthesise (make energy from light) and naturally contain pigments like chlorophyll and phycocyanin. In Australia, they’re sold as nutrient-rich foods and supplements.

Microalgae vs seaweed (macroalgae)

Microalgae are single-celled and microscopic, living in fresh or salt water. Seaweeds (macroalgae), on the other hand, are larger, multicellular marine algae such as kelp and nori.

What are the benefits of microalgae supplements?

Microalgae are known for their impressive nutritional profile. While different species have slightly different strengths (spirulina, chlorella, AFA), they’re generally celebrated for:

• Rich in plant protein – Spirulina and chlorella are complete proteins, supporting strength, recovery, and overall wellness.
• Antioxidant support – Pigments such as chlorophyll and phycocyanin help protect cells from everyday stress.
• Immune support – Compounds like beta-glucans and polysaccharides help maintain healthy immune function.
• Gentle detoxification – Chlorella, in particular, may help bind unwanted heavy metals and support natural detox.
  
• Natural energy boost – Their unique mix of amino acids, vitamins, and minerals helps fuel daily vitality.
• Plant-based omega-3s – Some microalgae provide EPA and DHA, essential fatty acids for brain and heart health.

Are microalgae supplements the same as algae supplements?

Not exactly. “Algae supplements” is a broad term, and “microalgae supplements” are just one part of it.

In everyday use, people often say “algae supplements” when they really mean microalgae like spirulina, chlorella, or AFA. These are the most common algae found in powders and capsules.

But algae can also mean macroalgae (seaweeds) such as kelp. Seaweed products are usually sold for their natural iodine content, but they’re quite different from microalgae in size, habitat, and nutrients.

Simple rule of thumb:

• If a product says “algae supplement” and lists AFA, spirulina, or chlorella,  it’s a microalgae supplement.
  
• If it lists kelp, nori, or dulse,  it’s a seaweed (macroalgae) supplement.

Final thoughts