I cycle carbs usually. nothing bad about them at all! esp for women, they are beneficial for hormone production. I just feel better when I cycle and it feels ancestrally consistent to me. when I do keto, my body switches to fat as fuel. additionally, ketones are mega anti inflammatories. so much so that cases of schizophrenia have gone into complete remission in ketosis. that's an extreme case obvi but shows the healing power of ketones. as with everything tho, diet is bio-individual and i've found what works for me.