###### Abstract  
The current research focused on algae from the waters of the Black Sea--_Chuomorpha__lnum_, _Ulw__intestinal__, _Ericaria__, and bioreactors--_Chorella_ spp. and _Arth__t  
among which antioxidant, antidiabetic, anti-acetylcholinesteraseerase, antimicrobial [5], anticancer [6], antitumor [7], anti-inflammatory [8], photoprotective [9], and antiviral [10] properties. The main groups of antioxidants in macroalgae, along with specific examples and potential algal sources for application, are presented in Tables 1 and 2. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Antioxidant** & **Health Benefits** & **References** \\ \hline \(\beta\)-carotene, lutein & Protection against breast cancer & [11] \\ \hline  & Inhibition of \(\alpha\)-glucosidase & [12] \\ Bromophenol & Antitumor effect & [13] \\ Carrageenan & Anti-HIV-effect & [14] \\ Oligosaccharides & Improves hyperoxaluria & [15] \\ Fucoidan & Protection against & [16] \\  & neurodegenerative disorder & \\ \hline Fucofoforethols & Chemoprereutive effect & [17] \\ \hline  & Antiangiogenic effect & [18] \\ Fucoxanthin & Protective effect against retinol deficiency & [19] \\ \hline Galactan sulfate & Antiviral effect & [20] \\ \hline Phenolic functional groups and & Anticancer effect & [21] \\ mycosporine (as amino acids) & Anti-inflammatory and bactericidal effect & [21] \\ \hline  & Anti-inflammatory and bactericidal effect & [21] \\ Phlorotannins & Inhibition of H\({}_{2}\)O\({}_{2}\)—mediator of DNA & [22] \\  & damage & [22] \\  & Photochemoprereutive effect & [22] \\ \hline Phycoerythrin & Improvement of diabetic complications & [23] \\ \hline  & Vascular chemoprotection & \\ Polyphenols & Antimicrobial effect & [24] \\  & Inhibition of \(\alpha\)-glucosidase & \\ \hline Porphyan, shinorine & Anti-aging effect & [25] \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Antioxidant components and health benefits for compounds, derived from marine algae. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Components** & **Algal Source** & **References** \\ \hline \(\beta\)-carotene &
\begin{tabular}{c} _Chondrus crispus_ \\ _Mastocarpus stellatus_ \\ \end{tabular} & [26] \\ \hline Fucoxanthin & Brown algae & [27] \\ \hline Antheraxanthin & & \\ Lutein & & \\ Violaxanthin & Red algae & [28] \\ Xanthophylls & & \\ Zeaxanthin & & \\ \hline Stypodi & & \\ Isoepitaandiol & _Taonia atomaria_ & [29] \\ Taondiol & & \\ \hline Terpenoids & _Ericaria crinitta_ & [30] \\ \hline Phycoerythrin & & [31] \\ Phycoeryanin & Red algae & [32] \\  & & [33] \\  & & [34] \\ \hline Catechin & & \\ Epicatechin gallate & _Halimeda_ spp. & [35] \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Main groups antioxidants in macroalgae. Marine algae (red, brown, and green) are an excellent source of sulfated polysaccharides with an anticoagulant activity of non-mammalian origin. Some of the structural similarities between algal polysaccharides and heparin have prompted groups of scientists to explore their antithrombotic [44], antiadhesive [39,45], antiparasitic [46], and other properties. Scientific interest is directed not only at the antioxidant effect of marine algae, but also at the antioxidant activity of freshwater algae cultivated in bioreactors such as _Arthrospira/ Spirulina_ (Cyanobacteria). According to various studies, _Arthrospira/ Spirulina_ (Table 3) has the potential to improve heart health by influencing the blood lipid composition, blood pressure [47,48], and cholesterol profile, by lowering LDL (bad) cholesterol and total triglycerides and increasing good (HDL) cholesterol [49,50]. _Chlorella_ spp. has high levels of essential fatty acids, antioxidants, and vitamins, and this makes it a superior choice for applications in culinary technology and food industry. [PERSON] and [PERSON] summarize the data from several clinical trials regarding the effect of _Auxencholorella pyrenoidosis_ (formerly _Chlorella pyrenoidosis_) in the treatment of fibromyalgia, hypertension, and ulcerative colitis [51]. Green algae (_U.