This is another aspect of the catch-22 backlash: without appropriate levels of B12, the effects of FIP may worsen, and because of FIP, your cat's ability to retain adequate reserves of B12 is diminished
Within sensible limits, the basics help your body hold its levels: a diet that includes B12 sources if you are not vegan, limiting heavy alcohol use, and not smoking, since both affect how you absorb and store nutrients
Injectable timelines are not trial-validated
& Chandrawati, R
In 1981, for example, a paper published in the International Journal of Clinical Pharmacology, Therapy, and Toxicology described a trial with six volunteers who experienced immediate sleep pressure after intravenous DSIP infusion, as well as increased sleep time, decreased sleep onset, and better sleep efficiency without any sedative effects.13 Three years later, two other human trials across ten test subjects with insomnia found that DSIP administration yielded statistically significant improvements in several key sleep measures fewer sleep arousals, greater sleep efficiency, and increased REM, spindle, and slow-wave sleep.14 The above studies had shortcomings, namely their very small sample sizes, but the sleep-improving effects in cases of insomnia point to DSIPs potential to live up to its name