don't know about beta sisterol but I've had a few good runs with Relora and PS.
Take Relora spread through the day 300mg morning, 300@ lunch ,300mg at dinner. On workout days take one dose Preworkout. I prefer it stacked with a PS (phoshatidylserine) product. My favorite is EndoAmp Max from primordial performance.
Also, I like to ramp up the dose (usually over two weeks) to 1200mg on wo days and taper back down 300mg a day before stopping completely.