Cobalamin (vitamin B12) is a cobalt-containing, B complex vitamin. B12 group (cobalamins) consist of cyanocobalamin, hydroxocobalamin, methylcobalamin and cobalamid. Neither plants nor animals are independently capable of constructing vitamin B12. Only bacteria and archaea have the enzymes required for its biosynthesis. Therefore, humans must absorb it from food. Excellent sources of B12 are foods of ruminant origin, so dairy and meat products play an important role in efforts to meet the official daily B12 intake. Vitamin B12 deficiency can potentially cause severe and irreversible damage, especially to the brain and nervous system. Vitamin B12 is used to treat vitamin B12 deficiency, including pernicious anemia.

Sucrose is a disaccharide composed of glucose and fructose, and found in many plants and plant parts. Sucrose is often extracted and refined from either sugarcane or beet sugar for human consumption. Upon ingestion, sucrose is hydrolyzed in the small intestine by by sucrase to glucose and fructose. Sucrose is used as inactive ingredients in numerous drugs. In medicine, sucrose is used for pain relief in infants.

Pastaron (Urea) is a waste product of many living organisms, and is the major organic component of human urine. It is a very important starting material in a number of chemical syntheses, and is used on an industrial scale for the manufacture of fertilizers, pharmaceuticals, and resins. Urea is an osmotic diuretic similar to mannitol but more irritant. Applied topically, urea promotes hydration of keratin and mild keratolysis in dry skin. It increases water uptake by the stratum corneum and has an antipruritic effect. Pastaron is used to soften rough or dry skin caused by skin conditions such as eczema, psoriasis, keratosis, and others.

Melatonin (5-methoxy N-acetyltryptamine) is a hormone synthesized and released from the pineal gland at night, which acts on specific high affinity G-protein coupled receptors to regulate various aspects of physiology and behaviour, including circadian and seasonal responses, and some retinal, cardiovascular and immunological functions. Melatonin is also made synthetically and available without a prescription as an over-the-counter (OTC) dietary supplement in the U.S. Melatonin supplementation has many uses, however, it has been widely studied for treatment of jet lag and sleep disorders. Parents may consider using melatonin to help their child who has a trouble falling asleep. A medical professional should always evaluate insomnia or other sleeping disorders in children. Additionally, melatonin has been shown to protect against oxidative stress in various, highly divergent experimental systems. There are many reasons for its remarkable protective potential. In mammals, melatonin binds to a number of receptor subtypes including high-affinity (MT1 and MT2) and low-affinity (MT3, nuclear orphan receptors) binding sites, which are distributed throughout the central nervous system and periphery.

Zirconium is a hard, silvery metal that is very resistant to corrosion. Zirconium orthopedic hip replacements have shown superior wear-resistance over other systems; however, risk of catastrophic fracture remains a concern. In dentistry, zirconium has been widely adopted for endosseous implants, implant abutments, and all-ceramic crowns. Because of an increasing demand for esthetically pleasing dental restorations, zirconia-based ceramic restorations have become one of the dominant restorative choices.

Deoxyguanosine is a nucleoside consisting of the base guanine and the sugar deoxyribose. It is like guanosine, but with one oxygen atom removed. It is a nucleoside component of DNA. Deoxyguanosine can be converted to 8-hydroxy-deoxyguanosine (8-OHdG) due to hydroxyl radical attack at the C8 of guanine. 8-OHdG is a sensitive marker of the DNA damage This damage, if left unrepaired, has been proposed to contribute to mutagenicity and cancer promotion. Deoxyguanosine has long been recognized as a potent cytotoxic agent to cultured mammalian cells. This toxicity or inhibition of DNA synthesis by deoxyguanosine appears to be mediated by deoxyguanosine triphosphate-mediated inhibition of the enzyme ribonucleotide reductase. Purine nucleoside phosphorylase deficiency is thought to cause T-lymphocyte depletion by accumulation of deoxyguanosine and deoxyguanosine triphosphate, resulting in feedback inhibition of ribonucleotide reductase and hence DNA synthesis. Deoxyguanosine nucleoside analogs are potent antiviral agents.

2′-Deoxyadenosine, a pair of deoxythymidine (T) in double-stranded DNA, is a substrate of adenosine deaminase. In case of absence of this enzyme, 2′-deoxyadenosine accumulates in T lymphocytes and kills these cells resulting in a genetic disorder known as adenosine deaminase severe combined immunodeficiency disease (ADA-SCID).

Tocotrienols are a group of chemicals that are part of the vitamin E family. Tocotrienol is any of the four forms, alpha, beta, gamma and delta, of a member of the vitamin E family. It has potential hypocholesterolemic, antithrombotic, antioxidant, immunomodulating and antineoplastic activities. Tocotrienol inhibits the activity of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase, thereby lowering cholesterol levels. In addition, tocotrienol acts through multiple signal transduction pathways to induce cell cycle arrest and caspase-mediated apoptosis, and to decrease tumor cell proliferation. In addition, this agent may inhibit angiogenesis through the blockage of vascular endothelial growth factor receptor (VEGFR) and the subsequent inhibition of tumor cell-induced vessel formation. Also, this agent prevents free radical formation and inhibits lipid peroxidation, thereby preventing DNA cell damage. Tocotrienols are scare in nature. They are found most abundantly in crude palm oil extracted from palm fruits. Other sources are rice bran, wheat germ, oat and barley. These substances are available in supplement form as capsules or pills.

Thymidine is a water-soluble pyrimidine deoxynucleoside and potent thymidine kinase substrate. Thymidine is known to be converted to dTTP and utilized for DNA synthesis. It is also known that thymidine is converted by catabolic enzymes to several end products. Excess thymidine results in high levels of dTTP, which exerts a regulatory feedback inhibition in the nucleotide biosynthesis pathways leading to DNA synthesis. This property of thymidine is used when it is given in high doses to patients with solid tumors. Thymidine is being tested in Phase II of clinical trials for the treatment of cancer and 5'-Nucleotidase Syndrome.