Phytogen by Thorne provides a potent blend of four well-researched immune-supporting botanicals that benefit immune function.


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Phytogen by Thorne combines Echinacea, Coptis, Astragalus, and Schisandra in one formula that supports immune function in the respiratory tract, GI tract, and bladder.

Ingredient Information

Geometric Shape

Key Ingredients

  • Astragalus Extract
  • Schisandra Extract
  • Coptis Extract
  • Echinacea

Ingredient Amounts

Serving Size: 3 Capsules
Servings Per Container: 20
Name Amount
Astragalus Extract 30 mg
Coptis chinesis 110 mg
Echinacea Root 450 mg
Schisandra Extract 225 mg
Other Ingredients: Hypromellose Capsule, Microcrystalline Cellulose, Silicon Dioxide

How to Use

Take 3 capsules two to three times daily or as recommended by one of our health coach professionals.

Phytogen® Details

Because optimal immune function is an important part of long-term wellness, it is important to provide support during times of high stress, seasonal changes, and when you are not feeling your best.

Your immune system is made up of cells, organs, and tissues that work together to protect your body from outside invaders. White blood cells, including natural killer (NK) cells and interferons all act as your body’s first line of defense. Supporting these vital components of your immune system can go a long way to keeping you healthy.

Thorne’s Phytogen is a unique 4-in-1 formula for an all-angle approach to optimal immune function. It combines four well-researched immune-supporting botanicals that promote optimal immune function.

Astragalus root benefits:

  • Promotes healthy immune function by supporting white blood cell function and the production of interferons.
  • Promotes the natural production of white blood cells.
  • Acts as an adaptogen to counteract the effect that stress has on the body, including the immune system.

Echinacea root benefits:

  • Benefits immune function by supporting the normal activity of white blood cells and NK cells, and promotes the ability of other cells to respond to outside invaders.
  • Promotes healthy and resilient mucus membranes.

Coptis chinesis extract benefits:

  • Berberine in Coptis provides broad support for immune function.
  • Helps maintain a healthy microbiome.
  • Promotes healthy respiratory tract mucus membranes.

Schisandra extract benefits:

  • Supports immune function in the respiratory tract.
  • Has immune-modulating effects.
  • Acts as an adaptogen to help mitigate fatigue and promote endurance.


Proposition 65 Warning Notice for California Residents
Consuming this product can expose you to chemicals, including lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/food.

Allergy Warning
This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.

Pregnancy Warning
If pregnant, nursing, or trying to conceive, do not use this product.

There are no known adverse interactions or contraindications at publication date.



Our Mission

We believe personalized, scientific wellness can extend the duration of one's health span, create happier and healthier lives, and feel one’s best at every age and life stage. Our ambition is to empower individuals to live healthier for longer through personalized, scientific testing and solutions. With a deep portfolio of personalized offerings – testing that provides individualized data, educational resources, and products that support specific health goals and needs – Thorne is here at every age and life stage. Thorne is redefining what it means to live healthier for longer.

How we know our supplements work

At Thorne, being able to rely on the safety and efficacy of our nutritional supplement products is the motivating force behind our clinical trials program. Our confidence that each product we formulate and manufacture works in the body comes from extensive clinical research and medical literature that substantiate the presence of each ingredient in each formula. In addition to confirming the safety of our products, clinical research helps us better understand their efficacy. And it paves the way for new discoveries. The ultimate goal of our research partnerships is to help us fulfill our mission of solving the biggest challenges in health and wellness.
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