However, as collagen and gelatin are animal products, so the binding and thickening agent you'll need to solidify the veggie broth is agar agar powder, which you can buy online (this Kate Naturals ...

If the test is positive, the confirmed test is performed. The confirmed test involves taking a sample from a positive lactose broth tube and streaking it onto Eosin Methylene Blue (EMB) agar. The ...