The brain normally contains one of the highest concentrations of vitamin C in the body. Experimentally, it has been shown that following a brain injury, the ascorbic acid (vitamin C) levels in the brain begin to fall rapidly.
Any injury to the nervous system, whether it is a stroke, infection, or chronic degenerative disease. Such patients should be given extra doses of vitamin C, E, and the other antioxidant vitamins and minerals.
The potassium helps the brain and nerve cells, improves concentration, memory and calms the mind.
Raw lemons are full of vitamin C and potassium.
Chilli contains capsaicin and excellent neurotransmitter. Capsaicin particles penetrate your skin, move through the tissue, and trigger deeper nerves. It releases endorphins and gives a feeling of happiness and well being. Chillies too are high in vitamin C (about twice that of citrus fruits), dried chillies are very high in vitamin A, and red chillies are a great source of b-carotene. Chillies have antibacterial qualities, and contain bioflavinoids, anti-oxidants most common in apple juice.
The tradition of keeping nimbu-mirchi at home is not just superstition. It indeed helps neurotransmitters and keeps mind subtly alert. When eaten, it helps brain physically to remain alert. When mind and brain are in sync and alert, we take decisions with wakeful state.
Do a google scholar search and you will find thousands research suggesting strong connection of lemon-chilli duo with brain.
It’s not a joke. Your grand-mother is no wrong when she suggests you using nimbu-mirchi at home. Visually, it keeps mind alert. Physically, it keeps brain alert.