Table 1.

Antioxidant activity of Asparagopsis extracts.

Species	Experimental Assay	Extract	Result	Units	Ref.
A. armata	DPPH	Dichloromethane-mehtanol 1:1	6.25	EC50 mg/mL	[77]
		BHA (positive control)	0.04	EC50 mg/mL	[77]
		BHT (positive control)	0.06	EC50 mg/mL	[77]
		Ascorbic acid (positive control)	0.06	EC50 mg/mL	[77]
		α-tocopherol (positive control)	0.014	EC50 mg/mL	[77]
		Methanol	0.86	EC50 mg/mL	[78]
		BHA (positive control)	0.008	EC50 mg/mL	[78]
		BHT (positive control)	0.011	EC50 mg/mL	[78]
		Methanol	23.9 ± 0.3	% radical-scavenging activity at 10 mg/mL	[79]
	Nitric oxide	Ethanol	14.33	EC25 mg dry algae/mL	[80]
	Deoxyribose test	Water	68.76	% inhibition at 1 mg/mL	[78]
A. taxiformis	Hydrogen-peroxide scavenging	Chloroform	11.07 ± 0.151	% inhibition at 500 µg/mL	[81]
		Petroleum ether	10.88 ± 0.139	% inhibition at 500 µg/mL	[81]
		Methanol	10.77 ± 0.131	% inhibition at 500 µg/mL	[81]
		Ethyl acetate	10.25 ± 0.136	% inhibition at 500 µg/mL	[81]
		Ascorbic acid (positive control)	17.59 ± 0.222	% inhibition at 500 µg/mL	[81]
	Superoxide-radical scavenging	Methanol	85.00 ± 0.002	% scavenging activity at 500 µg/mL	[81]
		Chloroform	79.21 ± 0.006	% scavenging activity at 500 µg/mL	[81]
		Petroleum ether	47.00 ± 0.018	% scavenging activity at 500 µg/mL	[81]
		Ethyl acetate	45.00 ± 0.008	% scavenging activity at 500 µg/mL	[81]
		Ascorbic acid (positive control)	87.11 ± 0.0005	% scavenging activity at 500 µg/mL	[81]
	FRAP (ferric-reducing antioxidant power)	Chloroform	67.19 ± 0.0005	% antioxidant activity at 500 µg/mL	[81]
		Methanol	65.63 ± 0.001	% antioxidant activity at 500 µg/mL	[81]
		Petroleum ether	64.06 ± 0.0005	% antioxidant activity at 500 µg/mL	[81]
		Ethyl acetate	54.69 ± 0.0005	% antioxidant activity at 500 µg/mL	[81]
		Ascorbic acid (positive control)	73.44 ± 0.002	% antioxidant activity at 500 µg/mL	[81]
	Reducing activity	Water (M1)	233.15 ± 5.15	mg AAE/100 g dw a	[82]
		Water (M2)	174.38 ± 11.65	mg AAE/100 g dw	[82]
		Ethanol (M1)	1908.44 ± 59.15	mg AAE/100 g dw	[82]
		Ethanol (M2)	1156.86 ± 13.87	mg AAE/100 g dw	[82]
		Methanol (M1)	584.46 ± 15.36	mg AAE/100 g dw	[82]
		Methanol (M2)	1161.47 ± 14.43	mg AAE/100 g dw	[82]
		Ethyl acetate (M1)	409.60 ± 10.84	mg AAE/100 g dw	[82]
		Ethyl acetate (M2)	707.42 ± 98.78	mg AAE/100 g dw	[82]
	DPPH	Water (M1)	4.65 ± 0.29	IC50 mg/mL	[82]
		Water (M2)	1.37 ± 0.03	IC50 mg/mL	[82]
		Ethanol (M1)	1.54 ± 0.07	IC50 mg/mL	[82]
		Ethanol (M2)	1.37 ± 0.04	IC50 mg/mL	[82]
		Methanol (M1)	2.69 ± 0.03	IC50 mg/mL	[82]
		Methanol (M2)	1.64 ± 0.01	IC50 mg/mL	[82]
		Ethyl acetate (M1)	3.62 ± 0.04	IC50 mg/mL	[82]
		Ethyl acetate (M2)	1.44 ± 0.08	IC50 mg/mL	[82]
	Ferrous-ion chelation	Water (M1)	113.01 ± 10.62	IC50 mg/mL	[82]
		Water (M2)	74.00 ± 1.81	IC50 mg/mL	[82]
		Ethanol (M1)	5.26 ± 0.27	IC50 mg/mL	[82]
		Ethanol (M2)	10.49 ± 0.44	IC50 mg/mL	[82]
		Methanol (M1)	8.36 ± 0.29	IC50 mg/mL	[82]
		Methanol (M2)	10.07 ± 0.18	IC50 mg/mL	[82]
		Ethyl acetate (M1)	1.57 ± 0.03	IC50 mg/mL	[82]
		Ethyl acetate (M2)	5.88 ± 0.26	IC50 mg/mL	[76]

M1—Extraction by sonication + stirring; M2—Sohxlet extraction; ^a mg l-ascorbic acid equivalent per 100 g of dry weight.