Preheat your oven to 350°F (175°C).
Grease a 9x5 inch loaf pan.
In a bowl, whisk together flour, baking powder, baking soda, and salt.
In another bowl, mix sugar and eggs until light and fluffy.
Add in the vegetable oil, lemon juice, lemon zest, and vanilla extract. Mix well.
Gradually add the dry ingredients to the wet ingredients, stirring until just combined.
Pour the batter into the prepared loaf pan.
Bake for 50-60 minutes or until a toothpick inserted in the center comes out clean.
Let the loaf cool in the pan for 10 minutes, then transfer to a wire rack.
Once cool, drizzle with a glaze made of powdered sugar and lemon juice, if desired.