3.6. Stability of seaweed extracts in yogurt
The DPPH radical scavenging activity of all yogurts was similar over
the 28 day storage period indicating stability of the seaweed extracts in
yogurt (Fig. 1). All seaweed extract-enriched yogurt samples had significantly
(P b 0.05) higher DPPH radical scavenging activities compared to
the corresponding controls. Yogurts containing FV60e (0.25%) and FV60e
(0.5%) exhibited the highest DPPH radical scavenging activity similar to
that of Trolox (0.04 μM) standard. These findings indicated that the seaweed
extracts are stable antioxidant ingredients within a fermented
dairy product such as yogurt. Similarly, O'Sullivan et al. (2014) reported
that seaweed extracts were stable in milk as a function of storage time.