Niacin and Iodine

Jenna Song and Harshita Dandu


  • Role of nutrient in human body: In the human body, niacin produces energy from the body's blood sugar and produces fats. Niacin allows for proper functioning in the digestive and nervous systems. Niacin produces estrogen, progesterone, testosterone, and sex hormones.

  • Symptoms of deficiency: Some symptoms that occur from niacin deficiency are fatigue, indigestion, vomitting, and depression. Some more symptoms that occur include: memory loss, disorientation, apathy, headache, diarrhea, swollen mouth, and a rash on the skin.

  • Food Sources: Niacin is found in many meat products such as the liver, poultry, and fish. Niacin can also be found in whole grain bread products such as nuts and dried beans.


  • Role of nutrient in human body: It is necessary for the thyroid function,for normal growth,the development and functioning of the mind and brain. Iodine is also needed for the normal metabolism of cells.
  • Symptoms of deficiency: Insufficient iodine can slow down the body’s metabolism, which can cause weight gain.
  • Food Sources: Iodine is found in salt, dried kelp, hard cheese, cod, salami, and cooked haddock.