Our results demonstrate that inhibition of GLUT‐1 and GLUT‐3 may be necessary to efficiently inhibit the growth of cancer cells since both glucose transporters GLUT‐1 and GLUT‐3 may be upregulated upon withdrawal of glucose.22, 23, 32 Dual GLUT‐1‐ and GLUT‐3‐selective compounds such as Glupin would inhibit both transporters. Here, SLC2A3 is linked to cancer.