Although I am not a certified health care worker or nutritionist, I was a medical transcriptionist for 21 years, studied nutrition, and am an avid health-minded individual who does her research. My mother taught me how to make Appalachian curative teas and I have forever held a fascination with how products from nature make me feel. This is also partly why I garden organic veggies, fruits and herbs, for health benefits and taste.
Bitters primary effect is to promote digestive juices such as stomach acid, bile and enzymes to breakdown food and assist in the absorption of nutrients. Eclectics promote digestive bitters for improved detoxification, healthy skin, improved joint pain and healthy mood.
I make my own bitters. Not a hard process.
I take a small mason jar that has been sterilized and I add perhaps half full with cilantro and then add the bitter agent and fill with the alcohol and close. If Im doing a cinnamon stick, I might put several sticks in the jar.
I put them in sterile cleaned dropper jars. You can find the dark dropper jars on places like Amazon. The dark bottle helps to protect them from aging in the light. I store in a cabinet with my teas.
If you're not feeling crafty, try going to the alcohol aisle and finding the mixer "angostura bitters" used for cocktails and also as a vitality booster and digestive aid. Win/Win.