How were religious groups who used alcohol in their ceremonies affected by prohibition in America? Where they allowed to use it? How did they obtain said alcohol? If so was it at all regulated?
Alcohol for religious use and medical use was specifically exempt.
In 1925, the Department of Research and Education of the Federal Council of the Churches of Christ reported that "the withdrawal of wine on permit from bonded warehouses for sacramental purposes amounted in round figures to 2,139,000 gallons in the fiscal year 1922; 2,503,500 gallons in 1923; and 2,944,700 gallons in 1924. There is no way of knowing what the legitimate consumption of fermented sacramental wine is, but it is clear that the legitimate demand does not increase 800,000 gallons in two years."