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5-Hydroxyoxindole has been identified as a urinary metabolite of indole, which is produced from tryptophane via the tryptophanase activity of gut bacteria [1]. 5-Hydroxyoxindole has lipid peroxidation inhibition activity and free radical DPPH scavenging

Alginic acid (Snow acid algin G) is a natural polysaccharide extracted from brown seaweeds with anti-anaphylactic and anti-inflammatory activities. Alginic acid inhibits histamine release and can be used in the food industry.

Vulpinic Acid (Pulvinic acid methyl ester) is a lichen metabolite with anti-inflammatory, antibacteria, properties, plant growth inhibitor.

2-Hydroxybenzylamine, a potent small molecule scavenger of IsoLGs, sequesters the reactive species as inert adducts. 2-Hydroxybenzylamine may be used to decrease early recurrence of atrial fibrillation and other atrial arrhythmias following atrial fibrillation ablation by decreasing IsoLG adducts with native biomolecules.

Avicularin (Fenicularin) has anti-allergic, anti-inflammatory, hepatoprotective, antioxidant, anti-tumor and other activities. It ameliorates human hepatocellular carcinoma by modulating the activities of NF-κB(p65), COX-2, and PPAR-γ. In LPS-stimulated RAW 264.7 macrophages, it exerts anti-inflammatory activity by inhibiting the ERK signaling pathway.

3,6-Dihydroxyflavone suppresses the epithelial-mesenchymal transition in breast cancer cells by inhibiting the Notch signaling pathway.

(R)-5-Hydroxy-1,7-diphenylheptan-3-one ((5R)-Dihydroyashabushiketol) is extracted from the rhizomes of Alpinia officinarum, a Chinese medicinal herb, and inhibits melanogenesis in theophylline-stimulated murine B16 melanoma 4A5 cells.

Eckol inhibits ultraviolet B-induced cell damage by a decrease in oxidative stress in human keratinocytes.This compound is unstable in powder form and other related salt forms are recommended.

Antroquinonol is a ubiquinone derivative from Antrodia camphorata with anti-inflammatory and anticancer activities.Antroquinonol reduces oxidative stress and inhibits inflammation and sclerosis in mice with focal segmental glomerulosclerosis through enhancement of the Nrf2 signaling pathway.Antroquinonol has potential for use in the treatment of non-small cell lung cancer. Antroquinonol has potential for the treatment of non-small cell lung cancer and may be used in colon cancer research.

Sodium salicylate (2-Hydroxybenzoic acid sodium salt), a metabolite of acetylsalicylic acid, can inhibit NF-kB and reduce oxidative stress.

3,4,5-Trimethoxybenzoic acid (Gallic acid trimethyl ether) are potent antioxidants and inhibitor of cytokine production. It can ameliorate chronic stress-induced various behavioral and biochemical alterations in mice. It also exerts hepatoprotective effects in CCl4-induced rats, specifically by modulating oxidative-nitrosative stress and inflammation.

DL-Mevalonolactone, a human endogenous metabolite, is the δ-lactone form of mevalonate, a precursor of the mevalonate pathway. It reduces mitochondrial membrane potential (∆Ψm), Ca2+ retention and NAD(P)H levels in the brain, and also induces mitochondrial swelling.DL-Mevalonolactone induces inflammation and oxidative stress, and reduces mitochondrial membrane potential.

L-Methionine sulfoxide (H-Met(O)-OH) is a metabolite of Methionine that modulates oxidative stress and purinergic signaling parameters, while inducing M1/classical macrophage polarization.

Methionine sulfoxide, an oxidation product of methionine formed through interaction with reactive oxygen species, serves as a biomarker for oxidative stress in vivo.

Arecoline hydrobromide (Arecoline HBr) is a muscarinic acetylcholine receptor agonist.

Paeoniflorin (Peoniflorin) is a herbal constituent extracted from the root of Paeonia albiflora Pall.

L-Theanine is a relaxing and nondietary amino acid found pretty much exclusively in teas from Camellia sinensis and is known to promote relaxation without sedation.

Matrine (Vegard), an alkaloid isolated from the Sophora genus, acts as a kappa opioid receptor agonist.

Sinapinic Acid (Synapoic acid) protects the rat liver from CCl4-induced inflammation, most likely by acting as a free radical scavenger and modulator of NF-κB p65 activation and proinflammatory cytokine expression. Sinapic acid with antioxidant role protects cardiac cells and its functions from I/R induced oxidative stress. Sinapic acid is a potentially useful agent for the protection against liver fibrosis and cirrhosis. Sinapic acid prevents the alterations in the levels of lipids and lipoproteins by virtue of its anti-lipidaemic effect in isoproterenol induced myocardial infarcted rats. Sinapic acid ameliorates hyperglycemia through PLC-PKC signals to enhance the glucose utilization in diabetic rats.

1. Oxyresveratro can inhibit tyrosinase activity. 2. Oxyresveratro is useful to trauma models, as toxicity to glia could be beneficial by inhibiting reactive gliosis. 3. Oxyresveratrol (trans-Oxyresveratrol) has antioxidant activity, can reduce neuronal oxidative damage and protect hepatocytes against oxidative stress and mitochondrial dysfunction, which may be associated with activation of Nrf2.

Uric acid sodium is a potent and widely recognized antioxidant with the ability to scavenge oxygen free radicals, helping to maintain blood pressure stability and counteract oxidative stress. It effectively eliminates reactive oxygen species (ROS), such as singlet oxygen and peroxynitrite, and inhibits lipid peroxidation. Additionally, uric acid sodium is closely associated with the pathogenesis of gouty arthritis and the formation of calcium oxalate stones, and it can be used to induce hypertension models.

1,4-D-Gulonolactone (D-Gulonic acid γ-lactone) (also known as reduced ascorbic acid, RAA) is the substrate of the enzyme L-gulono-1,4-lactone oxidoreductase (EC 1.1.3.8), which catalyzes the last step of the biosynthesis of L-ascorbic acid (vitamin C) in plants and animals. The enzyme L-Gulono-1,4-lactone oxidase is missing in scurvy-prone, vitamin C-deficient animals, such as humans. 1,4-D-Gulonolactone is present in human blood and has been used as one of the markers to compare changes in exercise-induced oxidative stress.

geraniol provides a potent protective effect against cardiac dysfunction induced by diabetes. This ameliorative effect could be attributed to its suppression of oxidative stress.

DL-Homocysteine thiolactone hydrochloride (DL-Homocysteinethiolactone hydrochloride) is a cysteine derivative that binds to and induces conformational changes in various plasma proteins, slowing coagulation and inducing oxidative stress. It decreases left ventricular systolic blood pressure and cardiac force and induces seizures in vivo.