Ok so after reading a few posts about how it is important to have a LOR from a PI if you list research as an experience. SO my question is that does not having a LOR from other experiences raise a red flag too. My premed advisor said he usually includes 3 of the best LORs, so I pretty much requested 4 LOR of my most recent activities that I knew were going to be good. However, I decided not to request LOR for older activities, such as chemistry tutor(university organization employed me), soup kitchen volunteer, and a few other things.