Sometimes the shake makes me feel jittery but the pills and the patch are very smooth and never make me feel jittery. I also have severe anxiety and I believe the shake has the most caffeine so I usually only take half of the shake but A LOT of people enjoy the shake most. Sorry I keep saying shake lol but I honestly haven't noticed any difference in sleep, I even sleep with my patch on every night! They also have a product called Rest that's for sleep, I've never taken it because sleeping pills used to give me panic attacks so I'm too scared to try it but my mom loves it and says she just drifts off to sleep instead of waiting to fall asleep and she's not groggy in the morning.

This may be wayyy TMI but my periods are regular now too, which they never were before. I used to roll my eyes when my mom would tell me "it fills in your nutritional gaps" but it does seem like that's what it's doing... I've taken vitamins in the past, expensive ones but they never actually did anything other than like my nails looking better.