How can I ensure consistent skin tones across a series of photos?

Hi, I often find myself working with a series of photos, and the problem I'm facing is how to maintain uniform skin tones and textures across all of them. I'm curious to learn about effective methods and tips to tackle this issue and ensure that the subjects' skin tones and textures remain consistent throughout the entire series. If you have any insights or advice on how to achieve this, I'd greatly appreciate your input.