What it's normally used for
Vitamin B6 helps a lot of the systems in your body function. It's important for cardiovascular, immune, digestive, muscular, and nervous system function. It's one of the vitamins that are behind the scenes. Vitamin B6 is used for proper brain development and function and makes the hormones serotonin and norepinephrine, which affects your mood. Vitamin B6 also helps you make melatonin, which regulates your internal clock.
Vitamin B6 benefits may include positive effects on seizures, depression, chronic pain, and Parkinson's disease. This might be because vitamin B6 plays a major role in creating serotonin and dopamine, which are needed for nerve communication.
What it does for Lucid Dreaming
Vitamin B6 is known for being an influence on dreams. A 2002 study of 12 college students (4 participants took 250mg, 4 took 100mg and 4 were given placebos) demonstrated that taking 250 mg of Vitamin B6 each day over 5 days, caused a big difference in dream content (as rated by each of the participants), in the areas of: emotionality, dream vividness, bizarreness and colour. Though, most studies on Vitamin B6 and effects on dreaming suggest that you need a dose of 250mg to generate these results – this is way higher than many recommended daily intakes. In moderate use, Vitamin B6 has been known to increase the ability to recall dreams.
Vitamin B6 has a major role in converting tryptophan to serotonin, which helps generate more vivid dreams and makes them easier to remember. To maximize the effects of Vitamin B6, tryptophan needs to also be in your system as well.
My own results
I take Vitamin B6 after six hours of sleep and I remember more of the dream, where it seems like it's a longer dream.