Packed with vitamins and minerals, Spirulina offers many benefits to maintain a healthy body (despite it's average taste).

(4.7 from 91 reviews. or .)


Lactose Free

Gluten Free Ingredients





Value for Money

Pay in four fortnightly installments when your order is over $100.

Price Per Bag

250g = $19.00

500g (2 x 250g) bags = $16.50 each
1kg (4 x 250g) bags = $13.75 each


In stock for same day dispatch when you order before 3pm AEDT (Monday to Friday)

Package Size

Spirulina Powder 250g

Spirulina is a single cell, fresh and saltwater blue-green alga widely considered a "superfood" because of its excellent nutritional content and health benefits.

It is exceptionally nutrient-dense - naturally high in protein while containing a large variety of vitamins and minerals.

Spirulina has been consumed for hundreds of years, dating back to the 16th century where it was documented that native African tribes would consume sun-dried Spirulina. Before that, the Aztecs used it as an endurance booster and to treat various diseases.

Great variety of Essential Amino Acids (EAAs)

Spirulina is a source of complete protein, which is unique for protein from a plant source. It contains all essential amino acids, with 18 amino acids in total (out of a possible 22). It also has a relatively high biological value (BV) of 75%, ranking it better than soy protein.

Naturally high in beta carotene

Spirulina is naturally very high in beta carotene, which the body can convert to vitamin A. Vitamin A is vital for the health of skin, eyes and teeth, hair and bones while also assisting immune health. However, too much vitamin A can be toxic. The advantage of supplementing with beta carotene is that the body will only convert as much as it needs and discard the excess.

Jam-packed full of antioxidants

Research suggests that Spirulina has antioxidant and inflammation-fighting properties. The main active antioxidant in Spirulina is phycocyanin, which can fight free radicals and inhibit the production of inflammatory signalling molecules, providing impressive antioxidant and anti-inflammatory effects.

It helps the body with energy production

Spirulina is very high in B1, B2, and B3 vitamins. All three of these vitamins play an essential role in energy production, namely breaking down carbohydrates, sugars, and fats and turning the food energy into an energy source the body can use.

A 2014 study also pointed to improving muscular strength and endurance and reducing fatigue markers from supplementing with Spirulina, which may be the reason why the ancient Aztecs gave it to marathon runners to help keep their energy levels high.

A truly impressive nutritional profile

Gram for gram spirulina may be the most nutrient-dense food on earth. In a single 5g serve, Spirulina has:

  • 19 calories
  • Protein: 3.1g
  • Fats: 0.3g
  • Carbohydrates: 0.8g
  • Vitamin B1 (thiamine): Helps convert nutrients into energy - 13% of the RDA
  • Vitamin B2 (riboflavin): Necessary for energy production, cell function and fat metabolism - 18% of the RDA
  • Vitamin B3 (niacin): Necessary for fatty acid synthesis - 4% of the RDA
  • Iron: Helps provide oxygen to muscles - 11% of the RDA

It also contains magnesium, potassium and manganese.

How to get the most out of Spirulina

Spirulina is a complete protein source; however, it is relatively low in the amino acid cysteine. For this reason, Spirulina combines well with whey protein to better round out the amino acid profile because whey is naturally high in cysteine. In addition, Spirulina's natural nutritional density far outweighs that of whey protein, making it an excellent combo.

Best way to use Spirulina

Spirulina has a bitter taste, so people often mix it with yogurts, juices, and smoothies to improve its flavour.

Directions & Ingredients


Consume 5g of Spirulina one to two times a day. Many users have larger doses

A flat teaspoon equals 3g of Spirulina.

Spirulina Directions

Combine powder with liquid and consume immediately.

For weight loss purposes many people find taking Spirulina before meals beneficial.

Due to Spirulina's very strong taste, many people find blending with juice more pleasant than water.




Keep well sealed, protect from moisture, light and heat.

Further Reading on Spirulina

Frequently asked questions about Spirulina

How does Spirulina taste?

Bulk Nutrients' Spirulina is unflavoured and is generally considered to be bitter.

What is Spirulina made from?

Spirulina is a natural extract.

Are samples available of Spirulina?

Sorry we do not provide samples of Spirulina.

How is Bulk Nutrients' Spirulina packaged?

Spirulina is packaged in resealable 250g pouches.

Is the packaging for Spirulina recyclable?

Yes! The bag can be recycled by placing it in the REDcycle drop off point bins.

If you'd like more information, check this article which breaks down how Bulk's various products' packaging can be recycled.

Spirulina Nutrition Panels

Servings per 250g package: 50Servings size: 5g
Average Quantity Per ServingAverage Quantity Per 100g
Energy (kj)78.51,570
Protein (g)3.162
Fats (g)0.36.6
(saturated) (g)0.12.4
Carbohydrates (g)0.816
(sugars) (g)0.23
Sodium (mg)00.9
Spirulina (g)5100
Servings per 250g package: 50Servings size: 5g
Average Quantity Per ServingAverage Quantity Per 100g
Vitamin B1 (Thiamine) (mg)0.153.0
Vitamin B2 (Riboflavin) (mg)0.234.5
Vitamin B3 (Niacin) (mg)0.7014.0
Vitamin B5 (Pantothenic Acid) (mcg)0.051.0
Vitamin B12 (Cobalamin) (mcg)17.5350
Vitamin K1 (mcg)48.8975
Folate (mcg)6.25125
Inositol (mg)3.5070
Servings per 250g package: 50Servings size: 5g
Average Quantity Per ServingAverage Quantity Per 100g
Calcium (mg)5.0100.0
Copper (mg)0.00.3
Iron (mg)2.040.0
Magnesium (mg)10.3205.0
Manganese (mg)0.12.0
Phosphorous (mg)52.51,050
Potassium (mg)67.51,350
Selenium (mcg)0.36.5
Zinc (mg)0.817
Chromium (mcg)10.0200

Spirulina Reviews