The categories answer different questions: weight management supplements use fibers, stimulants, botanicals, minerals, or multi-ingredient blends marketed to affect appetite, energy expenditure, absorption, or body weight; heart health supplements supply ingredients marketed around cardiovascular variables.
The categories separate most clearly through different mechanisms. For weight management supplements, examine active ingredient and stimulant load; for heart health supplements, examine cardiovascular endpoint and formulation. Features should enter the decision after the decision has a concrete goal.