Consuming in the having a deficiency in certain vitamins or minerals is known as

What evidence can you use to prove that different nerves carry information from the fingertips to the brain?

In which way does nicotine cause addiction? by stimulating the brain's pleasure center by increasing blood-sugar levels by decreasing dopamine levels by reducing depression and anxiety

If a person has a bad pain in their back, specifically lower back a bit above the hip, what should they do besides going to the doctor? what remedies could they use?