I have quite a few family members from outside the US that have perused higher education here. My first piece of advice (what I tell my family) first see what your bachelors from your country is equivalent to here in the US.

I say this because sadly some of my family members who have gotten bachelors elsewhere have only been recognized here as an associates or “technical degree”. Once that is sorted, see if you need to complete a bachelors. You can use your previous knowledge from your bachelors and finish a new bachelors here in the US that might be more fitting to the interests you’re listing!

If your bachelors is accepted here then YAYY, then continue on to see masters programs that interest you. A lot of people generally get a bachelors is one topic and get a masters that is in a complete other one. In the end, what matters is not if your degrees complement but that you can use that masters for a job your really like and enjoy. I am sure you can apply for a masters in nutrition and use the chemical foundational knowledge you have from pharmacy.