Glucaric acid is a non-toxic, naturally occurring compound, which is found in small amounts in plants and mammals, including humans. Salts of glucaric acid have potent antiproliferative properties in vivo. The risk of cancer development can be reduced by ingesting food rich in glucaric acid or self-medication with its salts. Glucaric acid inhibits bacterial beta-glucuronidase, thus increasing the excretion of conjugated xenobiotic compounds and decreasing activity of harmful substances. Inhibition of beta-glucuronidase ultimately results in potentially decreasing the risk of carcinogenesis. Calcium salt of the acid demonstrated anti-cancer activity in patients with breast cancer (phase I clinical trial) and in preclinical models of liver, lung, colon and skin cancers. Calcium-D-glucarate is being marketed as a dietary supplement.

Selegiline, also known as L-deprenyl, is a substituted phenethylamine, a selective, irreversible inhibitor of Type B monoamine oxidase. Selegiline is available in pill form under many brand names (Eldepryl, Carbex, Atapryl) and is used to reduce symptoms in early-stage Parkinson's disease. Selegiline delays the time point when the L-DOPA (levodopa) treatment becomes necessary from about 11 months to about 18 months after diagnosis, which is beneficial despite not being definitive evidence of neuroprotection. The rationale for adding selegiline to levodopa is to decrease the required dose of levodopa and thus reduce the motor complications of levodopa therapy. Selegiline is also delivered via a transdermal patch (brand name, Emsam) and in this form, Selegiline is used as a treatment for the major depressive disorder. Selegiline (brand name Anipryl) is also used (at extremely high dosages relative to humans) in veterinary medicine to treat the symptoms of Cushing's disease and cognitive dysfunction (Canine Cognitive Dysfunction) in dogs. Side effects of the pill form include, in decreasing order of frequency, nausea, hallucinations, confusion, depression, loss of balance, insomnia, increased involuntary movements, agitation, arrhythmia, slow heart rate, delusions, hypertension, new or increased angina pectoris, and syncope. The main side effects of the patch form for depression included application site reactions, insomnia, diarrhea, and sore throat.