According to WebMD, chlorella provides the body with fiber, chlorophyll, vitamins and minerals and is thought to prevent cancer. People also use chlorella to treat Crohn's disease, high blood pressure, halitosis, ulcers, fibromyalgia, constipation and high cholesterol. As of 2014, none of these uses have sufficient evidence to validate them. WebMD warns against taking chlorella for a period of more than two months.
As WebMD explains, some people also use chlorella to fight human immunodeficiency virus, improve the immune system, detox harmful metals from the body and delay aging. Chlorella is a nutritional supplement sold in liquid or tablet form and provides the body with fats, carbohydrates and proteins. It is also a good source of amino acids, nucleic acids and peptides.
The majority of chlorella used in health supplements is grown in Taiwan and Japan, and the harvest methods vary drastically. Because of this, the ratio of carbohydrates, proteins and fats differs widely from one supplement to the next. Chlorella contains a high amount of iodine, which makes the supplement helpful in preventing and treating radiation poisoning. However, overexposure to the iodine content in chlorella can cause adverse health complications, especially for people who are sensitive to the ingredient. WebMD warns that chlorella is also known to cause severe allergic reactions in some people and should be avoided by women who are pregnant or breastfeeding.