The participants' best-corrected distance acuity was measured using a rear-illuminated Snellen chart at 6 meters (about 20 feet, or closer if the participant was not able to read the 6/60 optotype) and converted to LogMAR notation for the purposes of analysis.
Overview. Vanadium is a trace mineral found in many foods. Scientists think your body may need vanadium in very small amounts for normal bone growth. Scientists aren't sure exactly what effects vanadium may have, or what amount might be helpful, however, they know high doses of vanadium are likely to be unsafe.
Animal studies linked high doses of vanadium with decreased fertility, birth defects, and other complications. People with kidney disease should not take vanadium. High doses of vanadium (more than 1.8 mg per day) may cause liver or kidney damage, and research suggests vanadium may be harmful to the kidneys. Other studies link high blood levels of vanadium with an increased risk of breast cancer.