May improve brain function
The B vitamins play a role in keeping your brain healthy. Adequate amounts of B vitamins in the body are essential for optimal body, brain, and nerve functioning.
Possible cancer prevention
Data on the role of B vitamins in cancer prevention is mixed. Some studies found that certain B vitamins may help prevent some types of cancer, while others found evidence that high levels of B vitamins might cause some types of cancers.
May improve mood and reduce stress
If you have low levels of B vitamins, research shows you may be at a greater risk of depression and higher stress levels. Taking a B complex supplement can help you boost your blood levels to help you feel more calm and content. But it's unclear whether B vitamins have any added benefits for people with normal blood levels.
Possible weight loss
You may have read or heard that taking a vitamin B complex supplement or vitamin B12 shots can help you lose weight. Unfortunately, this hasn’t been proven through research. There are some animal studies that show it might be possible, but scientists aren't sure yet.
May improve heart health
Some studies show that certain people could improve their heart health if they take B vitamins, but it’s not recommended for everyone. If you would like to take vitamin B for your heart health, speak to your doctor first, to make sure there aren’t any reasons not to take it.
May improve nerve function
A lack of vitamin B, specifically vitamin B12, is linked to some problems with the nerves. Too little vitamin B12 can cause a painful condition called neuropathy. If you’ve been diagnosed with a vitamin B12 deficiency, your doctor will likely recommend a vitamin B12 supplement.
