Pot Aloe vera gel – a natural source of antioxidants

Abstract

Aloe vera (Aloe barbadensis Miller) is widely spread around the world and it is used in the food and cosmetic industry and traditional medicine due to its high content in bioactive compounds. Thus, this article investigated the phenolic compounds of Romanian Aloe vera gel and its antioxidant capacity. The gel was extracted using 4 different solvents: methanol, ethanol, water, and acetone. Total phenolics were measured by the Folin-Ciocalteu method, total flavonoids by aluminium chloride reaction, and the antioxidant capacity by DPPH radical-scavenging activity. The profile of the phenolic compound was determined using Fourier transform infrared spectroscopy and Liquid Chromatography-Diode Array Detection–Electro-Spray Ionization Mass Spectrometry. The methanolic extract had a significantly higher antioxidant activity, followed by ethanolic, water, and acetone extracts. The methanolic extract had also the highest total polyphenol content, while ethanolic extract had the highest total flavonoid content. The extracts contained 14 compounds identified as 7 chromones (Aloesin, Neoaloesin, Aloinoside A, Aloinoside E, Aloe-emodin-glucoside, Isoaloeresin D, Methoxycoumaroyl-aloresin) 2 flavones (Luteolin-glucoside, Apigenin-glucoside), one hydroxycinnamic acid (Caffeic acid) and 4 to anthrones (Aloin A, Aloin B, Emodin, Aloe-emodin). The LC-MS results showed important quantities of Aloesin, Neoaloesin, Aloeresin E, and Aloe-emodin-glucoside while FTIR analysis showed the presence of polysaccharides, pectins, anthraquinones, and saponins.

Pytochemical profile of Aloe ferox Mill. across different regions within South Africa

“…Literature reports that some flavonoids in plants do exhibit potential antiviral activities (Wang et al 2020). Aida et al (2022) found the methanolic extract of Aloe vera to exhibit the highest polyphenol content, while ethanolic extract showed the highest flavonoid content. Flavonoids were found to be present in A. ferox across the samples, which supports the use of A. ferox as a medicinal plant.…”

Ginger (Zingiber officinale) Root Capsules Enhance Analgesic and Antioxidant Efficacy of Diclofenac Sodium in Experimental Acute Inflammation

“…Total polyphenols content (TPC) was evaluated using Folin–Ciocalteu as previously described by Pop et al [ 30 ]. Ginger root capsules extract (25 μL of) was mixed with Folin–Ciocalteu reagent (125 μL; 0.2 N) and sodium carbonate (Na 2 CO 3 ) solution (100 μL; 7.5% w / v ), homogenized, put in 96-well plates and incubated at room temperature in dark conditions.…”

“…The High-Performance Liquid Chromatography–Mass Spectrometry (HPLC-MS) analysis of GRCE was performed as described by Pop et al [ 30 ]. Agilent 1200 HPLC with DAD detection was coupled to Agilent 6110 single quadrupole mass spectrometer.…”

A Wonder Plant Aloe vera L. (Liliaceae): An Overview of its Folk Traditional Uses, Phytoconstituents, Biological Activities, and Cosmaceutical Applications

“…A lot of studies have reported diverse classes of phytochemicals (Table 2) in Aloe species using different methods [17,[25][26][27][51][52][53][54][55][56][57][58]. Sathyaprabha et al [51] found tannins, saponins, terpenoids, flavonoids, steroids, cardiac glycosides, phlobatannins, squalene oleic acid and dodecanoic acid in A. vera.…”

“…Antioxidants are a group of compounds that inhibits the free radicals and lipid oxidation reactions in the body [36,77,78]. A lot of studies have described the antioxidant activity of the A. vera plant [27,57,58,70,[79][80][81][82] and the details of antioxidant activity conducted globally using various methods are given in Table 3.…”