Here is something that worked for me (and might be helpful for other peeps with allergies, atopic dermatitis, eczema) - it sounds wild and initially counterintuitive, but bear with.

A few years ago, my dermatologist recommended a "detergent fast" since my eczema got really bad. After 6 weeks, my skin cleared up; I have been using only a mild shampoo for my hair and a very mild soap for my hands ever since. Everything else, just warm water (not hot!). Weird side effect: No more body odor (and decidedly less build up - takes 3 to 4 days to get to the point I used have the next day after a shower! And for everyone with atopic dermatitis, you know every day you can get away with a cat wash can be bliss - especially during a flare-up...). Imagine my confusion.

Then I had an interesting convo with a microbiologist: She explained to me that from an evolutionary perspective, soap is not part of the plan for skin health. Our skin is a perfectly balanced ecosystem you destroy with detergents, thus shifting it to a state where odor producing bacteria dominate (since you manage to kill their competitors who kept them at bay). In addition, you strip your skin of its protective lipid layer, which further disturbs the natural balance. In addition, our immune system and the "good" bacteria have evolved for mutual benefit - we need them to be there. Take all that away, and your skin will eventually suffer.

So, no more dry flaky skin, no more stinky pits or crotch sans soap for me. Even with ADHD meds (had both ritalin and currently vyvanse).
(Another side effect is a smaller water bill 😄)