Here is a list of herbs that boost the immune system simultaneously acting as an herbal tonic:

Reishi mushroom (Ganoderma Lucidum, Ganoderma Tsugae, & Ganoderma Applatum)

NOTE: Reishi can be also used as an added remedy for epilepsy and is supposedly safe for use in dogs and humans struggling with epilepsy alike....
make sure to always consult a physician before starting any herbal supplement and as always, do your own research.

Ginseng (Panax quinquefolius, panax ginseng)

Mormon tea (Ephedra Nevadensis)

Ginger (Zingiber officinale)

Moringa leaf (Moringa oleifera)

Lions' Mane mushroom (Hericium erinaceus)

Turmeric (Curcuma longa)

Turkey Tail  mushroom (Trametes Versicolor)

TAKE ANY OF THESE HERBS IN A TEA AND THEY WORK WONDERS FOR PEOPLE LIKE MYSELF WITH GASTROINTESTINAL ISSUES.

STEEP TIME: 10 MINS

RULE OF THUMB:          Any herbal tea that is non fruit and non-caffeinated (e.g. roots, mushrooms, flowers) for best results, Always assume steeping time as 10 minutes.

Thanks for reading, and Cheers!