Combine all the ingredients in a bowl, except for the vinegar.
Transfer the mixture to a Mason jar.
Pour in some apple cider vinegar and fill it to the top. It is best if 2/3 of the jar consist of dry ingredients, and fill in the rest with vinegar.
Close well and shake.
Keep the jar in a cool and dry place for 2 weeks. Shake well several times a day.
After 14 days, squeeze well and strain the liquid through a plastic strain. For better results put a gauze over it. Squeeze well so the whole juice comes out.
Store the tonic in the fridge. For maximum potency, let mixture infuse for six weeks. If you have a need, you can use the Master Tonic earlier. Take one or two tablespoons a few times a day as needed.