Pepsin bitters modern recipe

2 oz ground gentian root
2 oz ground bitter orange peel
2 oz ground wahoo bark
1 oz sweet flag root
2 oz mandrake root
0.5 oz cardamom
0.5 oz cloves
0.5 oz coriander
0.5 oz cinnamon bark
3.5 gallons diluted alcohol
3 pints rich simple syrup
2 pints glycerin
5 gallons distilled water, plus extra as needed

Macerate spices in dilute alcohol for five days, then filter and add syrup, glycerin, and water as needed. Dissolve 640g pepsin in 5 gallons of water and add it to alcohol mixture. Store in 16 oz bottles