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.
Vanadium is LIKELY SAFE in adults, if less than 1.8 mg per day is taken. At higher doses, such as those used to treat diabetes, vanadium frequently causes unwanted side effects including abdominal discomfort, diarrhea, nausea, and gas. It can also cause a greenish tongue, loss of energy, and problems with the nervous system. Vanadium is UNSAFE when used in large amounts and for a long time. This increases the risk of serious side effects including kidney damage. Vanadium might lower blood sugar.