The main causes of depression include genetic predisposition, hormonal imbalance and certain environmental or external factors. Previously, nutritional deficiencies were not considered as one of the factors defining the cause of depression.
However, several researches led to the discovery of the relationship between nutrition and depression. RD, LDN, MPH and vitamin deficiency can lead to an unending depressive state. The length and seriousness of your depression depends upon this deficiency of vitamins, specifically the B vitamins.
As far as your emotional status and mental health are concerned, the B complex vitamins play an important role by directly targeting the nervous system. The natural foods are comprised of refined carbohydrates and also supply adequate amount of vitamins to your body.
On the other hand, processed foods and other complications like kidney failure or alcoholism can cause B vitamins deficiencies. They are highly soluble in water and you are bound to lose in excess through urination. For this reason, you should supplement your body with adequate vitamins on a daily basis.
Apart from metabolizing carbohydrates for energy production, thiamine also helps in stimulating brain and nerves. This vitamin is meant to build strength, resilience and stamina. There are several symptoms indicating the deficiency of thiamine.
Source : http://www.health-fitness.com.au/vitamin-b-complex/
These signs include depression, irritability, insomnia, personality disorders and nervous breakdown. The conditions that can lead to such consequences include mal-absorption syndrome, insufficient diets, pregnancy and alcoholism.
It helps in enhancing the blood circulation and the functioning of the nervous system. It maintains healthy hair, nails and skin through proper metabolism of lower cholesterols and carbohydrates. In spite of so many food items containing this digestive system regulatory vitamin, it is quite common to end up with diet routines having lesser amount of niacin.
Source : http://www.infobarrel.com/Nutritional_Needs_Important_Vitamins_For_Cats
Deficient niacin in your body can even cause diseases like Pellagra. The signs and symptoms of deficient niacin include anxiety, irritability, psychosis, dry skin, dementia and depression.
The pantothenic acid or the vitamin B5 is solely responsible for the metabolism of proteins, fats and carbohydrates in your body. It has got several useful functions like maintaining hormonal balance to control stress through cortisone production, enhancing muscle growth and ensuring proper functioning of the nervous and the reproductive system.
It absorbs amino acids and produces the neurotransmitter acetylcholine. This chemical is directly related to the functioning of the central nervous system and helps to learn, manage memory and maintain all the other cognitive operations.
When it comes to processing of the amino acids and maintenance of the nervous system, it is pyridoxine which is responsible for the production of serotonin.
Source : http://www.justgk.com/Vitamin-B.html
Deficiency may lead to emotional imbalance, disruption of calmness and euphoria, irritability, depression, anxiety and antagonism. Kidney failure, birth control pills and alcoholism are the prime causes of vitamin B6 deficiency.
Folic acid deficiencies are commonly found in alcoholics and old aged people suffering from renal failure. It is responsible for proper nervous system functioning, RBC formation and reducing homocysteine in blood which is prime contributor to heart diseases and depressions.