Hi i'm on a low dose of doxycycline (20 mg per day) for rosacea. it's expensive. are there any foods that could be an alternative to this medication?

There are no foods: that will specifically help with rosacea but there are topical treatments that might be less expensive. Discuss your concerns with your health care provider and obtain different management options.

No: Simple tetracycline is a cheap alternative that should work. Despite all the goofy stuff online, food choices are almost never therapy. There are a host of other meds -- systemic and topical -- that will keep your rosacea at bay and prevent disfigurement. Best wishes.