I want to make a well-rounded tincture/extract that contains many different herbs that help the body fight infections, disease, and have antioxidant and healing effects.

Things like garlic, ginseng, yerba mate, green tea, st johns wort, etc.

I have a list of herbs I am interested in using and I am curious if it is bad or dangerous to put this many herbs into one tincture.

Are there any possible conflicts or overdoses that could arise from taking an extract with as many ingredients as these?

Bee Pollen
Blessed Thistle
Cranberry
Citrus Aurantium
Dandelion
Echinacea
Flaxseed Oil
Garlic
Ginger Root
Ginko Biloba
Ginseng
Grape Seed
Green Tea
Hawthorn Berries
Licorice Root
Marshmallow
Milk Thistle
Mint
Pau d' Arco
Peppermint
Plantain
Rosemary
Schizandra Fruit
St. John's Wort
Thyme
Yarrow
Yerba Mate

Thanks for any info!

That is a huge list, you should get a good herbal reference text, look up actions and interactions and design a more focused tincture.