Role of Dietary Supplements in the Management of Parkinson’s Disease

The use of food supplements and functional foods has increased in recent years to make up for nutritional deficiencies and support bodily functions. They are often used alongside medication to improve the health and symptoms of chronic diseases like heart disease, cancer, and gastrointestinal problems. In the case of Parkinson's disease, supplements and functional foods rich in vitamins and antioxidants are important in preventing or reducing symptoms. Natural compounds, phytochemicals, vitamins, and minerals can help prevent oxidative stress, free radical formation, and neuroinflammation, which are involved in the development of Parkinson's. This review collects evidence on how specific nutrients found in supplements and functional foods can improve the health of people with Parkinson's disease. Scientific evidence has shown that numerous molecules and natural compounds can mitigate the symptoms of PD by counteracting the physiopathological mechanisms which dominate the disease, such as oxidative stress and neuroinflammation. Furthermore, some molecules have been shown to possess neuroprotective and neuro-modulatory properties. Coenzyme Q10 (CoQ10) is a molecule in animals and most bacteria. It is a component of the process that generates energy in our cells and acts as an antioxidant that helps protect our cells from damage. CoQ10 can be found in foods like tuna or salmon, organ meats, whole grains, and supplements. Some studies suggest that taking CoQ10 supplements may slow down the progressive deterioration of function in Parkinson's disease (PD), but other studies have found no evidence of clinical benefits. Lipoic acid and N-acetyl-cysteine are other molecules that have potential therapeutic value in treating PD due to their antioxidant properties. Studies in animals have shown that lipoic acid may reduce the side effects of L-DOPA treatment, which is commonly used in PD and may provide neuroprotection against neurotoxicity. N-acetyl-cysteine may also provide neuroprotection against oxidative stress in PD. Vitamin E is a group of eight fat-soluble compounds that act as antioxidants and are found in many foods, such as vegetable oils, whole-grain cereals, butter, and eggs. The main form of vitamin E is alpha-tocopherol, which is easily absorbed and stored in the body. Some studies suggest that taking vitamin E supplements may help slow the progression of Parkinson's disease (PD), while others show no benefits. In a clinical trial, patients who received a combination of vitamin E and vitamin C had a longer delay before needing treatment with L-DOPA, a medication used to manage PD. However, another clinical trial found no evidence that vitamin E improved the clinical features of PD or delayed functional decline. Carvacrol is a type of natural compound found in plants like basil, rosemary, thyme, and oregano. It has been studied for its ability to fight bacteria and fungi, reduce inflammation, act as an antioxidant, and even affect the activity of neurons that produce dopamine, which is a neurotransmitter involved in Parkinson's disease (PD). One study on mice showed that carvacrol improved cognitive abilities without affecting pain or motor symptoms. Curcumin is another natural compound found in the roots of a plant called turmeric, which is used as a spice in many Asian dishes. It has been studied for its antioxidant, anti-inflammatory, and neuroprotective properties, which could be beneficial for treating PD. Some studies have shown that curcumin can reduce inflammation, lower levels of harmful molecules called reactive oxygen species (ROS), and protect brain tissues in animal models of PD. Omega-3 fatty acids are a type of fat found in certain foods like fish, walnuts, and flaxseed oil. They can help lower cholesterol levels in the blood. A study found that taking omega-3 fatty acids and vitamin E together improved symptoms of Parkinson's disease and reduced inflammation. Whey protein, a protein found in milk, contains an amino acid called cysteine which can boost the body's ability to produce glutathione, a powerful antioxidant. Another study found that whey protein supplementation increased glutathione levels in patients with Parkinson's disease but did not improve clinical outcomes. Vitamin D3 is a type of vitamin that your body makes when your skin is exposed to sunlight. It's important for your body to absorb calcium and regulate bone growth. You can get vitamin D3 from foods like fish and mushrooms or from supplements. Some studies suggest that vitamin D3 may also be helpful for protecting the brain and nervous system from damage in conditions like Parkinson's disease. Creatine is a molecule that your body naturally produces and helps provide energy to your muscles and nerves. Athletes sometimes take creatine to improve their performance, but studies have also shown that it may have antioxidant and neuroprotective effects. Some studies in animals have shown that creatine may protect against damage to the dopamine-producing neurons that are affected in Parkinson's disease. However, a clinical trial in humans found that while creatine may improve mood and reduce the need for higher doses of medication, it did not modify the course of the disease. More research is needed to fully understand the potential benefits of creatine for Parkinson's disease. Melatonin is a hormone that helps regulate sleep, blood pressure, and reproduction. It also has antioxidant properties which can protect the brain from damage caused by oxidative stress. Niacin, also known as Vitamin B3, is important for our body's metabolism and energy production. It has been found to have neuroprotective and antioxidant effects at low doses and may be helpful in treating Parkinson's disease. Studies have shown that nicotinamide, the active form of niacin, can protect brain cells from damage and increase antioxidant production in animal and cellular models of Parkinson's disease. In clinical studies, a high niacin diet was associated with a reduced risk of Parkinson's disease, and niacin supplementation was found to improve symptoms in some patients. However, more research is needed to fully understand the potential benefits and side effects of niacin in Parkinson's disease. Vitamin C is a nutrient found in fruits and vegetables, which helps the body function properly and can also act as an antioxidant, protecting the body from damage caused by harmful molecules. It has been shown to have potential benefits in managing Parkinson's disease by reducing the effects of oxidative stress and increasing the production of certain chemicals in the brain. 6-shogaol is a compound found in ginger, a plant used in cooking and traditional medicine. Studies have shown that 6-shogaol has properties that may be useful in treating Parkinson's disease, including protecting the brain cells that produce dopamine, reducing inflammation in the brain, and improving movement symptoms in animal models of the disease. β-carotene is a vitamin A precursor that can be found in certain vegetables and fruits. It can act as an antioxidant by preventing damage caused by free radicals and singlet oxygen. Studies suggest that consuming β-carotene regularly can have a protective effect against Parkinson's disease by reducing oxidative damage. Lycopene, which is found in red fruits and vegetables, is an even more powerful antioxidant than β-carotene. Studies have shown that lycopene can help protect against Parkinson's disease by reducing oxidative stress and improving cognitive and motor function in animal models. It may also improve mitochondrial function and reduce neuroinflammation. Overall, both β-carotene and lycopene have the potential as natural compounds to help manage Parkinson's disease. Flavonoids are natural substances found in plants and fungi that can be divided into six groups based on their structure. They are present in many foods like parsley, onions, berries, tea, Ginkgo biloba, red wine, and dark chocolate. Pollen is also a good source of flavonoids and contains many nutrients like carbohydrates, lipids, proteins, vitamins, and minerals. Flavonoids have many health benefits reducing inflammation, preventing cell death, and lowering cholesterol. They may also help protect against Parkinson's disease by protecting neurons against damage and interacting with important signalling pathways in the brain. One flavonoid, quercetin, which is found in pollen, has been shown to improve memory and reduce oxidative stress in mice and rats. Eating foods or taking supplements that contain flavonoids, like quercetin, may be helpful in preventing Parkinson's disease or improving symptoms in those who already have it. Green tea is a type of tea that comes from a plant called Camellia sinensis. It has been consumed in Asia for many years and has become more popular in other parts of the world because it has many health benefits. One of the important substances in green tea is called EGCG, which has antioxidant properties that can help prevent Parkinson's disease. Studies have shown that green tea can protect the brain from damage caused by Parkinson's disease, reduce oxidative stress, and lower the risk of developing Parkinson's disease. Ginkgo biloba is a plant that has been used in traditional Chinese medicine for many years. Its extracts, which contain flavonoids and terpenoids, may also be helpful in managing Parkinson's disease. Studies have shown that Ginkgo biloba extract can reduce neurotoxicity caused by Parkinson's disease, protect dopamine-producing neurons from damage, and prevent the formation of free radicals. It may also reduce oxidative stress and increase the activity of antioxidant enzymes."