Welcome to ABC!
If you are 12 weeks out I will assume you already know what you are doing and heading in the right direction. No need to try a completely new diet for the last 12 weeks.
Can you share how the previous weeks of prep went and how the diet is currently looking?
James 1:16-17 ESV
Do not be deceived, my beloved brothers. Every good gift and every perfect gift is from above, coming down from the Father of lights
With God's help...Mens sana in corpore sano