Is it safe?

Sierra

So I gave birth 3 weeks ago and when my milk came in I was able to pump a full 6 oz at a time then increased on its own I could pump 12 oz at a time then all of a sudden 2 or 3 days ago I could barely get 4 oz out.....so I got mothers milk tea to help but i also boughy this UpSpring Milkflow breast feeding supplement that you mix with milk kind of like hot chocolate. But I was wondering if i could take them at the same time? My LO drinks 3 oz at a time so I dont want to lose my supply. Ive pumped and frozen almost 40 bags since her birth buy I want to be able to continue.