Might it be possible that a a physically masculine woman wanting to lose weight benefit from men's diet products?

Yes: The truth is that designating a weight-loss product as "for men" or "for women" is 99% advertising / marketing. The key to weight loss will always be calories-in and calories-out, the products work when combined with exercise and a low-calorie diet, a cheap vitamin-mineral tablet is probably more than enough, & lasting weight loss comes from lifestyle change. Glad you're doing this; good luck.