All "Grade A" syrups are pure; the difference is in the timing of the harvest.
When shopping, look for these specific indicators on the label to ensure you aren't buying an imitation: buy real maple syrup
: Sourced from local Ontario farms, this syrup has been award-winning for over 140 years. It provides a authentic Canadian "sugar bush" experience. All "Grade A" syrups are pure; the difference
: A seven-generation family farm producing 100% pure Grade A syrup. Their Amber Rich variety is a staple for those seeking a traditional New England flavor profile. All "Grade A" syrups are pure