Product Description
You wrap up your biggest training week of the block, and two days later you're reaching for tissues instead of your running shoes. That timing isn't a coincidence: your gut houses a large share of your immune defenses, and heavy training strains that system long before you ever feel sick.
Thorne's Immune Activator is built to strengthen the body's natural defense through that gut-immune connection directly, pairing a prebiotic fiber with a polyphenol blend that keeps your body's defenses primed through demanding training blocks.
Feeds the bacteria that support your defenses – Benicaros, a prebiotic fiber made from upcycled carrot fiber, gives beneficial gut bacteria the fuel they need to multiply and crowd out the strains that drag your immune system down during hard training weeks.
Sharpens your immune response – MitoHeal, a polyphenol blend from redcurrant and blackcurrant extract, boosts the immune cell messengers your body relies on to detect and respond to daily stress faster.
Fits into a stack you're probably already running – One capsule a day slots in next to your vitamin C and zinc without adding another dosing decision to your morning routine.
The gut holds a large share of your immune system, and when training stress disrupts that environment, your defenses weaken well before symptoms show up. Benicaros works as a targeted prebiotic, feeding specific bacteria strains linked to a resilient microbiome rather than acting as a generic fiber source. MitoHeal, drawn from redcurrant and blackcurrant extract, supplies polyphenols that help activate the signaling molecules your immune cells use to communicate and respond. Together they support immune function starting in the gut instead of only reacting once you already feel run down.
How to Use Immune Activator
Dose: Take 1 capsule daily with food.
Training block timing: Start 2 to 3 weeks before your highest-volume weeks or race week, since gut-microbiome shifts build gradually rather than kicking in overnight.
Travel and race week: Keep taking it through travel and race day, when disrupted sleep and new environments add extra stress to your immune system.
- Gluten free
- Sport Tested: NSF Certified for Sport®
Supplement Facts
30 Servings
Serving Size: 1 Capsule
Serving Per Container: 30
| Amount Per Serving | ||
|---|---|---|
| % Daily Value* | ||
| Benicaros® Soluble Carrot Fiber 300mg | ** | |
| Redcurrant (fruit) (Ribes rubrum) and Blackcurrant (fruit) (Ribes nigrum) extract 250mg | ** | |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Daily Value (DV) not established
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We do not accept returns on food items that have been opened, but we will issue a store credit if you are unsatisfied. In the event of a return, you must first contact us before sending back a return shipment.
Consumable products over $40 receive a 50% store credit. This includes specialty nutrition products such as ketones or supplements/vitamins.
Thorne Immune Activator FAQ's
Everything you need to know about Thorne Immune Activator.
Heavy training strains your gut environment, and your gut houses a large share of your immune defenses. That strain builds through the week and shows up a couple days later, which is why gut support matters before you feel run down, not after.
Benicaros feeds specific beneficial gut bacteria strains linked to a resilient microbiome, crowding out the strains that drag your immune system down during hard training weeks. It's targeted at feeding the right bacteria, not just generic fiber.
Start 2 to 3 weeks before your highest-volume weeks or race week. Gut-microbiome shifts build gradually, so starting the week of won't give it enough time to work.
Yes — keep taking it through travel and race day. Disrupted sleep and new environments add extra immune stress on top of training load, which is exactly when gut support matters most.
It's built to fit alongside what you're already taking — one capsule a day next to your vitamin C and zinc, without adding another dosing decision to your routine.