NO ECA
I don't know your aunt's health history, but I'd have her stay away from any harsh stimulants. You could have her try a mild fat burner like EAS Phen-Free or Ultimate Diet Fuel Ma Huang free formula. Evwn better, I've found that combining 7-Keto with synephrine has been extremely effective for fat loss without the effects or possible effects of using heavy stimulants like ephedra.
Nothing beats a solid nutrition program and workout regiment. Hope this helps!