Brown algae is the largest, most complex type of algae. The largest species, and one of the most well-known, is kelp.

Compounds of Interest Applications

Omega-3-PUFA

Omega-6-PUFA

Arachidonic acid

Tannins

Carotenoids

Fucoxanthin

Fucosterol

Lutein

Astaxanthin

Nutrition: great source of essential PUFAs

Microalgae carotenoids:

  • natural colorants
  • antioxidant, antidiabetic, anti-obesity effects
  • cardiovascular protection
Why SFE

The whole biomass is available for extraction

PUFAs are thermolabile and so can be retained in high concentrations

Fucoxanthins are sensitive to heat, light, and low pH and therefore cannot be obtained from other methods

Optimization

For extract high in phlorotannins: 48.98˚ C/4,351psi

For extract high in carotenoids/fucoxanthin/total FA/antioxidant: 50.62˚ C/4,350psi

It is noted that the whole extract may have synergistic effects