acetyl l carnitine dreams L-Carnitine Acetyl-L-carnitine – Cellular energy –
Description
This shift in fatty acid composition may lead to the formation of morphologically normal intercellular lamellae that are functionally impaired, contributing to an incomplete skin barrier [27]

Improved outcomes from the administration of progesterone for patients with acute severe traumatic brain injury: a randomized controlled trial

Neuroscience 303, 126137

This combination can be particularly helpful for individuals with deficiencies or higher metabolic demands

doi: 10.1093/jn/133.11.3603

I haven't tried anything for the back yet