Please choose the correct ending to complete the given sentence: Health: [header] How to take l carnitine [title] Boost low carnitine levels. [step] When the body does not absorb or make sufficient carnitine, doctors will prescribe oral l-carnitine. [substeps] Carnitine levels may be low because of many reasons.

Ending1: Some carnitine deficiencies are due to exposure to light, while others are due to severe fevers. In most cases, light decreases carnitine levels by about 75 percent or lower. Ending2: Certain diabetes, high cholesterol levels, and higher levels of insulin could affect the absorption of l carnitine. Certain chronic conditions may interfere with the production of l carnitine in your body, such as diabetes, high blood pressure, heart disease, osteoporosis, and kidney disease. Ending3: Some health conditions could limit or prevent l-carnitine production. Just as your body cannot absorb l-carnitine from foods that you consume, your body also cannot absorb it from products that you drink. Ending4: Genetic disorders are the most common, but medical procedures such as hemodialysis also drain the body of l-carnitine temporarily. Vegetarians or anyone who is on a strict diet may also have low carnitine levels.

Answer format: ending1/ending2/ending3/ending4