Disclaimer: The findings discussed are lab based and further studies need to be done.
The health benefits of maple syrup have been well established. This includes the minerals potassium, calcium, magnesium, sodium, zinc, and iron. It is also rich in B-vitamins such as riboflavin, niacin, and thiamine. In addition, there are potential anticancer, antioxidant, and anti-inflammatory properties. With such a variety of helpful compounds, researchers are looking into the safety of maple syrup for our bodies, to prove all these nutrients have positive effects when consumed.
To study this, laboratory rats were given a maple syrup extract to analyze the consumption effects. The rats were grouped and each was given different dosages of this extract: 100, 300, and 1000 mg/kg/day. This experiment showed that the maple syrup extracts in the rats was well tolerated and did not result in any signs of toxicity.
Reference: Zhang, Y.; Yuan, T.; Li, L.; Nahar, P.; Slitt, A.; Seeram, N.P. Chemical compositional, biological, and safety studies of a novel maple syrup derived extract for nutraceutical applications. Journal of Agricultural and Food Chemistry, 2014, 62, 6687-6698. https://web.uri.edu/maple/chemical-compositional-biological-and-safety-studies-of-a-novel-maple-syrup-derived-extract-for-nutraceutical-applications/