Short answer D1 and some or most of D2 you have to attend chapel. So maybe between 1.5-2 years, honestly who cares if you're cool with 1.5 guess youd be cool with 2 years.
You should search, this comes up every year. Not doing your research on this school in particular is a bad idea. Since you as an adult will be treated differently at this school than any other dental school, its important that you do some research to make sure you will be a good fit (or can at least tolerate their policies).
Alcohol
The University holds that a lifestyle that is free of alcohol, tobacco, and recreational/illegal drugs is essential for achieving this goal. University policy is that all students are expected to refrain from the use of tobacco, alcohol, and other recreational or unlawful drugs during the period of their enrollment at the University....Students are notified of the University's abstinence policy during the application process and are responsible for complying with this policy while they are enrolled in the University. Failure to comply with this policy will result in discipline up to and including dismissal.
Pornography
Prohibited acts: No member of the University shall engage in pornographic acts. Prohibited activities include the sustained or intentional possession, viewing, downloading, exchange, transmission, storing, copying or reading of pornography in the workplace, place of learning, or University residence facilities. All verified violations of these policies shall be subject to disciplinary action, up to and including dismissal or termination of the relationship with the University.
Sexual Conduct
We believe that God's ideal for sexuality is achieved when sexual expression is limited to a man and woman who are husband and wife committed in lifelong marriage. All expressions of premarital and extramarital friendship are to be chaste, and behaviors which would suggest otherwise are to be avoided. All forms of sexual expression and conduct between heterosexuals outside of marriage, or between homosexuals, are contrary to the ideals of the University and will result in disciplinary action. Further, all forms of promiscuity, sexual abuse, and exploitation are contrary to the ideals of the University and will result in disciplinary action. Loma Linda University honors an ideal of sexual purity that transcends mere legal enforcements.
Chapel service
The following are required to attend the scheduled chapel experience each week:
D1 students, Hygiene students , D2 students, International Dentistry Program students
Meat & Caffeine
Although only vegetarian meals are served in all campus food centers, and vegetarian nutrition is stressed in the nutrition department curriculum, students are not required to abstain from either meat or caffeine.
http://forums.studentdoctor.net/threads/loma-linda-yay-or-nay.831086/#post-11141676