As with most cases regarding transition from in vitro to in vivo, In Vivo transfection is technically complicated. Some factors to take into account include DNA/RNA stability, efficiency of delivery into the body, and tissue/organ specificity. Fortunately, commercial manufacturers have designed kits and reagents especially for DNA or RNA delivery into the live animal. Lipid and non-lipid formulations are available, and many feature low toxicity and high delivery efficiency. Supporting data and publication references are also provided.