Is it possible to drink beetroot juice in the morning and pomegranate juice in the evening?

Yes, I see no contraindications to combine these two juices and consume one in the morning, the other in the evening. These juices can be purchased in pharmacies and on-line with home delivery. Here you can compare prices and order the preparation with home delivery or collection at a pharmacy, e.g. https://www.gdziepolek.pl/produkty/26371/ekamedica-burak-zakwaszony-plyn/apteki https://www.gdziepolek.pl/produkty/88504/sok-z-buraka-alter-medica-plyn/apteki https://www.gdziepolek.pl/produkty/106596/ekamedica-granat-plyn/apteki https://www.gdziepolek.pl/produkty/33783/granvital-granat-plyn/apteki If you have any questions to a dietitian, here you can use a paid teleconsultation: https://www.gdziepolek.pl/telekonsultacja/z-dietetykiem