There isn't one specific vitamin deficiency that causes anxiety and depression. However, research suggests that deficiencies in certain vitamins can contribute to these conditions, either directly or indirectly.
For example, vitamin D deficiency has been linked to increased risk of depression and anxiety, especially in people with seasonal affective disorder (SAD) or those who live in regions with limited sunlight. Vitamin D is essential for the brain to produce serotonin, a neurotransmitter that regulates mood, and low levels of vitamin D can lead to lower serotonin levels.
Another vitamin that may play a role in anxiety and depression is vitamin B12. A deficiency in this vitamin can cause symptoms such as fatigue, irritability, and mood changes. Vitamin B12 is also important for the production of neurotransmitters that regulate mood, such as serotonin and dopamine.
Other vitamins and nutrients that have been linked to mental health include omega-3 fatty acids, magnesium, and folate. It's important to note that while these deficiencies may contribute to anxiety and depression, they are not necessarily the sole cause, and other factors such as genetics, environment, and lifestyle also play a role. If you are experiencing symptoms of anxiety or depression, it's important to talk to your healthcare provider to determine the underlying cause and appropriate treatment plan