“…In fact, Tolba et al (2020) reported that a dietary supplementation with microalgae ( Hematococcus pluvialis ) astaxanthin (10–80 mg/kg) to broilers exposed to heat stress linearly decreased hepatic mRNA levels of several redox status-controlling genes, heat shock protein 70 ( HSP70 ), heat shock transcription factor 1 ( HSTF1 ), c-Jun N-terminal kinase 1 ( JNK1 ), tumor necrosis factor-α, and sterol regulatory element-binding protein 1 ( SREBP1 ), and increased diacylglycerol acyltransferase 2 ( DGAT2 ) mRNA levels, modulating molecular profiles of stress, inflammation, and lipid metabolism. Moreover, the dietary supplementation with very low levels of C. vulgaris (0.2 g/kg) has been reported to improve growth performance in heat-stress broilers ( Ziar-Larimi et al, 2018 ). The supplementation in drinking water (300–500 mg/kg) with the same microalgae had beneficial impacts on serum contents of triglycerides, cholesterol, LDL, and HDL in laying hens exposed to chronic heat stress ( Moradi kor et al, 2016 ), which were ascribed to a radical scavenging and hypolipidemic action of the β-1, 3-glucan found in the cell wall of this microalgae and/or the presence of antioxidant substances.…”