NegativeDynamics was an attempt to normalize disproportionate limbs, which seems to work in most cases. This came at the cost of changes to face structure, life stage and a subjective improvement to image quality, you win some you lose some. I find the result useful, maybe you will too.

All versions are dynamic, the simpler the prompt the more they contribute. Simple prompts become more effective.

Exactly what and how much they contribute will depend on how responsive the model is. They generally won't override any prompt, embedding or lora etc. For best effect place them at the very start of the negative prompt, you can reduce the strength somewhat with parenthesis and colons, i.e. (NegativeDynamics-neg:0.5)

NegativeDynamicsLite is the basic body normalizer, it will also provide some image improvement and focus on the character, This is probably the best choice for less glamorous images.

NegativeDynamics adds some extra context to the scene and further clarifies the image.

NegativeDynamicsExtreme adds possibly too much contextual detail, clarity and saturation. It only makes glamorous supermodels and detail rich scenes unless outweighed.

NDsfw is designed to encourage sfw with less degradation to image quality than equivalent prompt alternatives, it does nothing else. I find it can give more interesting results at lower strength i.e. (NDsfw-neg:0.7)