An extensive 2013 review of 66 studies regarding crash risk and drug use found that cannabis was associated with minor, but not statistically significant increased odds of injury or fatal accident.In the largest and most precisely controlled study of its kind carried out by the U.S. Department of Transportations National Highway Traffic Safety Administration, it was found that other "studies that measure the presence of THC in the drivers blood or oral fluid, rather than relying on self-report tend to have much lower (or no) elevated crash risk estimates. Likewise better controlled studies have found lower (or no) elevated crash risk estimates". The study found that "after adjusting for age, gender, race and alcohol use, drivers who tested positive for marijuana  were no more likely to crash than those who had not used any drugs or alcohol prior to driving".A 2018 study indicated that the number of fatal crashes involving marijuana after the recreational marijuana legalization or decriminalization increased in Colorado, Washington, and Massachusetts. Cardiovascular effects
Short-term (one to two hours) effects on the cardiovascular system can include increased heart rate, dilation of blood vessels, and fluctuations in blood pressure. There are medical reports of occasional heart attacks or myocardial infarction, stroke and other cardiovascular side effects. Marijuanas cardiovascular effects are not associated with serious health problems for most young, healthy users.
Iron(II) gluconate, or ferrous gluconate, is a black compound often used as an iron supplement. It is the iron(II) salt of gluconic acid. It is marketed under brand names such as Fergon, Ferralet and Simron. Uses
Medical
Ferrous gluconate is effectively used in the treatment of hypochromic anemia. The use of this compound compared with other iron preparations results in satisfactory reticulocyte responses, a high percentage utilization of iron, and daily increase in hemoglobin that a normal level occurs in a reasonably short time. Food additive
Ferrous gluconate is also used as a food additive when processing black olives. It is represented by the food labeling E number E579 in Europe. It imparts a uniform jet black color to the olives. Toxicity
Ferrous gluconate may be toxic in case of overdose. Children may show signs of toxicity with ingestions of 10–20 mg/kg of elemental iron. Serious toxicity may result from ingestions of more than 60 mg/kg. Iron exerts both local and systemic effects: it is corrosive to the gastrointestinal mucosa, it can have a negative impact on the heart and blood (dehydration, low blood pressure, fast and weak pulse, shock), lungs, liver, gastrointestinal system (diarrhea, nausea, vomiting blood), nervous system (chills, dizziness, coma, convulsions, headache), and skin (flushing, loss of color, bluish-colored lips and fingernails). The symptoms may disappear in a few hours, but then emerge again after 1 or more days. See also
Acceptable daily intake
Iron poisoning


== References ==