L-Kynurenine ((S)-Kynurenine) is a key intermediate in the breakdown pathway of tryptophan. L-Kynurenine is a substrate of kynureninase, KMO, and KAT associated with the suppression of antitumor immune responses. It has been shown to inhibit allogeneic T-cell proliferation and to increase malignant U87 glioma cell invasion into a collagen matrix.

D-Mannose (D-(+)-Mannose) is a carbohydrate. D-Mannose plays an important role in human metabolism, especially in the glycosylation of specific proteins.

Galactose 1-phosphate Potassium salt (α-D-Galactose-1-phosphate Dipotassium Pentahydrate) is an intermediate in the galactose metabolism and nucleotide sugars metabolism pathways.

D-Fructose-6-phosphate disodium salt (D-FRUCTOSE 6-PHOSPHATE DISODIUM SALT) is an important intermediate in the Carbohydrates pathway. The interconversion of glucose-6-phosphate and fructose-6-phosphate, the second step of the Embden-Meyerhof glycolytic pathway.

Phytic acid dipotassium salt is an endogenous metabolite that inhibits β-secretase 1 (BACE1).

Sucrose (D-(+)-Saccharose) is a nonreducing disaccharide composed of glucose and fructose linked via their anomeric carbons.

N-Acetyl-D-Glucosamine (NAG) is a monosaccharide derivative of glucose. It is released by the action of O-GlcNAcase, in mammalian systems from proteins that have been post-translationally modified with O-GlcNAc.

In cells, D-Glucose 6-phosphate sodium (G6P) is generated when glucose is phosphorylated by hexokinase or glucokinase or by the conversion of glucose-1-phosphate by phosphoglucomutase during glycogenolysis. G6P lies at the beginning of both glycolysis and the pentose phosphate pathways. It also can be stored as glycogen when blood glucose levels are high.

D-(+)-Xylose (Wood sugar) is an aldopentose - a monosaccharide containing five carbon atoms and an aldehyde functional group. It has chemical formula C5H10O5 and is 40% as sweet as sucrose. Xylose is also found in mucopolysaccharides of connective tissue and sometimes in the urine. Xylose is the first sugar added to serine or threonine residues during proteoglycan type O-glycosylation. Therefore xylose is involved in the biosythetic pathways of most anionic polysaccharides such as heparan sulphate and chondroitin sulphate. In medicine, xylose is used to test for malabsorption by administering a xylose solution to the patient after fasting. If xylose is detected in the blood and or urine within the next few hours, it has been absorbed by the intestines. Xylose is said to be one of eight sugars which are essential for human nutrition, the others being galactose, glucose, mannose, N-acetylglucosamine, N-acetylgalactosamine, fucose, and sialic acid. . Xylose in the urine is a biomarker for the consumption of apples and other fruits.

DL-Glyceraldehyde (Glyceric aldehyde) is produced from the action of the enzyme glyceraldehyde dehydrogenase, which converts glycerol to glyceraldehyde using NADP as a cofactor. When present at sufficiently high levels, DL-Glyceraldehyde can be a cytotoxin and a mutagen. A cytotoxin is a compound that kills cells. A mutagen is a compound that causes mutations in DNA. DL-Glyceraldehyde is a highly reactive compound that can modify and cross-link proteins. DL-Glyceraldehyde modified proteins appear to be cytotoxic, depress intracellular glutathione levels, and induce reactive oxygen species (ROS) production (PMID: 14981296 ). DL-Glyceraldehyde has been shown to cause chromosome damage to human cells in culture and is mutagenic in the Ames bacterial test.

D-N-Acetylgalactosamine (N-Acetyl-D-galactosamine) is an important constituent of brain heteropolysaccharides (glycoproteins).

α-D-Glucose 1-phosphate disodium salt is converted into D-glucose-6-phosphate by the enzyme phosphoglucomutase.

D-Pantothenic acid hemicalcium salt (Calcium pantothenate), a kind of water soluble vitamin, can reduce the patulin content of the apple juice.

Arabinose (DL-Arabinose), also known as (+ -)-arabinose or aloe sugar. Arabinose has been primarily detected in feces. Within the cell, Arabinose is primarily located in the cytoplasm. Arabinose exists in all eukaryotes, ranging from yeast to humans. Outside of the human body, Arabinose can be found in sweet basil and tamarind.

D-Allose (β-D-Allopyranose) is a rare naturally occurring monosaccharide known to exert anti-proliferative effects on cancer cells. The effects of D-Allose on the cellular membranes of hormone-refractory prostate cancer cell line (DU145), hormone-sensitive prostate cancer cell line (LNCaP), and normal prostate epithelial cells (PrEC) were studied at the molecular level by phospholipid profiling using a shotgun lipidomic method.

D-Lyxose (D-(-)-Lyxose) is used as a chiral building block.

L-Tartaric acid ((2R,3R)-(+)-Tartaric acid) occurs naturally in many plants, particularly grapes and tamarinds, and is one of the main acids found in wine. It is used as an antioxidant. Salts of tartaric acid are known as tartrates. L-Tartaric acid is a muscle toxin, which works by inhibiting the production of malic acid, and in high doses causes paralysis and death.

D-Ribose(mixture of isomers) (D-(-)-Ribose), commonly referred to as simply ribose, is a five-carbon sugar found in all living cells. Ribose is not an essential nutrient because it can be synthesized by almost every tissue in the body from other substances, such as glucose. It is vital for life as a component of DNA, RNA, ATP, ADP, and AMP.

Cytidine 5'-triphosphate disodium salt is one of the endogenous metabolites and is a cation-permeable ligand-gated ion channel agonist.

rel-(2R,3S)-2,3-Dihydroxysuccinic acid hydrate (meso-Tartaric acid monohydrate) occurs naturally in many plants, particularly grapes and tamarinds, and is one of the main acids found in wine. It is used as an antioxidant. Salts of tartaric acid are known as tartrates. Tartaric acid is a muscle toxin that inhibits the production of malic acid and, in high doses, causes paralysis and death.

Rhamnose monohydrate (L-(+)-Rhamnose Monohydrate) is a naturally-occurring deoxy sugar that is found primarily in plants and some bacteria.

Maltotriose is an inducer of E. coli maltose regulator, the second most abundant sugar in brewing. It induces beta-galactosidase synthesis.

D-Glucaric acid potassium (D-Saccharic acid potassium salt) is a compound formed from oxidizing sugars, which can be used to test for the presence of hepatic enzyme induction. Studies indicate that D-glucuronolactone dehydrogenase oxidizes D-Saccharic acid potassium salt into D-glucaro-l,4;6,3-dilactone. Alternate studies suggest that D-Saccharic acid potassium salt forms a complex with Cu(II) and H2O2to decolorize azo, acridine, triphenyl methane, anthraquinone and thiazine-based dyes.

alpha-D-glucose (α-Dextrose) is a primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement.

D-(-)-Tartaric acid (D-Tartaric acid; (S, S)-tartarate; D-threaric acid) is mainly located in the cytoplasm. D-(-)-Tartaric acid can be converted into (2S,3S)-cis-fertaric acid and (2S,3S)-trans-fertaric acid. Outside the human body, it can be found in vinegar. This makes it a potential biomarker for the consumption of this food.

D-Tagatose (D-(-)-Tagatose), a rare natural hexoketose and isomer of D-galactose, occurs naturally in Sterculia setigera gum and is found in small quantities in various foods such as sterilized and powdered cow's milk, hot cocoa, and various cheeses, yogurts, and other dairy products. It can be synthesized from D-galactose by isomerization under alkaline conditions in the presence of calcium. D-Tagatose has numerous health benefits, including promotion of weight loss, no glycemic effect, anti-plaque, non-cariogenic, anti-halitosis, prebiotic, and anti-biofilm properties; it is beneficial for organ transplants, enhancement of flavor, improvement of pregnancy and fetal development, treatment of obesity, and reduction in symptoms associated with type 2 diabetes, hyperglycemia, anemia, and hemophilia. (PMID: 17492284).

Methyl β-D-Galactopyranoside is an endogenous metabolite with antifungal activity.

Ribitol is a pentitol that can be formed by ribose reduction. Enhancement of the D-glucose to pentose phosphate pathway in Saccharomyces cerevisiae can be used to produce ribitol and D-ribose.

L-Arabinitol (L-(-)-Arabitol) is a potential biomarker for the comsuption of the food products such as sweet potato, deerberry, moth bean. L-Arabinitol is associated with Alzheimer's disease and ribose-5-phosphate isomerase deficiency.

D-(+)-Glucono-1,5-lactone (Gluconolactone) is a naturally occurring food additive used as a sequestrant, acidifier, curing agent, pickling agent, or leavening agent. It is a cyclic ester of D-gluconic acid and appears as a white, odorless crystalline powder.

N-Acetyl-D-mannosamine is a monosaccharide used as a precursor in the chemical or enzymatic synthesis of neuraminic acid found in glycolipids and glycoproteins.N-Acetyl-D-mannosamine is a specific substrate for the synthesis of n -acetylneuraminic acid, an essential precursor for bacterial podoplanar polysialic acid (PA).N-Acetyl-D-mannosamine is used in the synthesis of sialic acid. mannosamine is used in the synthesis of sialic acid. It is also an intermediate in the synthesis of many carbohydrate-derived bioactive compound families and drug candidates.N-Acetyl-D-mannosamine is used in the study of cognitive disorders and aging.

Thyminose induces apoptosis by inhibiting glutathione synthesis and increasing its efflux.

D-Arabitol is a polyol that can lead to neurotoxicity when accumulated in the body.

Pharmatose DCL 14 (D-Lactose monohydrate) is the major sugar present in milk and the main source of energy supplied to the newborn mammalian in its mother's milk. Pharmatose DCL 14 is also an important osmotic regulator of lactation. It could regulate human's intestinal microflora.

D-Glucuronic acid sodium salt monohydrate (Sodium D-glucuronate) is a carboxylic acid that is highly soluble in water. In humans, glucuronic acid often binds to toxic substances to facilitate elimination and to hormones to aid in their transport.

L-2-Phosphoglyceric acid (L-2-Phosphoglyceric acid disodium salt) is a glyceric acid which serves as the substrate in the ninth step of glycolysis. It is catalyzed by enolase into phosphoenolpyruvate (PEP), the penultimate step in the conversion of glucose to pyruvate.

L-Threonic acid Calcium Salt is an anti-osteoporotic that stimulates ascorbic acid absorption and is commonly used in calcium supplements.