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Target your gut bacteria to supercharge your immunity and improve overactive immune symptoms

• 20 Billion CFU/g
• 2 Functional Strains | 2 Targeted Strains
• Scientifically and clinically proven to help with the sniffles, flareups, and other immune setbacks.

Boosting Immunity through Gut Bacteria

Do you want to support your immune system? You’re more likely to need Lactobacillus casei, a probiotic that energizes your immune cells to be more alert. By taking care of your gut bacteria, in turn, they produce the right metabolites to take care of you and supercharge your immune system to protect you in the winter season.


Fight Allergies All Year Long

Improve symptoms of eczema, asthma, and food sensitivities with targeted probiotics.


Stop Bacterial Infections

Repair your gut lining while stopping pathogenic bacteria from colonizing.


Speed Up Healing Time

Fight chronic inflammation with preventive probiotic care. Recover from wounds and injuries faster with support from targeted probiotics.

Clinically Studied Strains

  • Lactobacillus paracasei Th1 - Boosts immunity against allergies

  • Lactobacillus plantarum - Repairs gut lining and fights off infections

  • Lactobacillus ruteri Tr1 (ADR1) - Speeds up recovery time

  • Vitamins and Prebiotics - Inulin, Vitamins C & D to improve digestion and remove toxins from the system

Our Capsules

  • Vegetarian Casing (Top Shell)

Vegetarian-friendly casing made from gluten-free non-GMO Hydroxy-propyl-methyl-cellulose.

  • Bypass Stomach Acid (Bottom Shell)

Designed to bypass stomach acids so stomach bacteria can better colonize the colon.

Proven Results

Study:  Multiple double blind studies were done with sample sizes ranging from 80 to 400+ participants over a period of 30-60 days with children and adolescents from 1-18 years old.

Results:  Those using our Ultimate Immunity saw a distinct reduction in both the frequency and severity of seasonal allergies from pollen and dust mites. Both skin and urine tests were utilized to check multiple markers and found improved conditions in eczema that lasted up to 4 months even after stopping the probiotics.

Probiotic Efficacy

Acid Tolerance

Our stomach acids are designed to help us fight off pathogenic bacteria and digest food. Stomach acid can harm probiotic growth, as well. Analyses show that our proprietary capsule has a higher acid tolerance than other leading probiotic supplements. That way, the beneficial bacteria strains can bypass the stomach acids and colonize the colon.

Bile Salt Tolerance

After we consume an item, our liver secretes bile salt. Bile salts help break down fats and remove waste from the system, including probiotic supplements. Analyses confirm that our probiotics have a higher survival rate against bile salts than other leading competitors.

Adhesion Ability

Once probiotics survive the harsh stomach acids and bile salts, they need to adhesion to the colon. Almost 3/4 of the probiotic bacteria in our supplement will successfully fasten themselves to the intestines. In comparison, less than one-third of their strains had the ability to survive.


When Thryve probiotic strains colonize, they immediately boost the immune system. Our bacteria strains had a stronger influence on Tumor necrosis factor-alpha (TNF-a). These interactions caused TNF-a to slow down the body’s immune response. As a result, inflammation quickly ceases in the host.


Our probiotic strains are bottled fresh in an amber bottle to prevent light damage. Between our all-natural casing and high-quality probiotic strains, the shelf life of Thryve products has a near-perfect survival rate. The quality of your probiotics will last three months without the need for refrigeration.

Why Thryve?

The bacteria strains chosen for Thryve Ultimate Immunity probiotics were selected by our panel of scientific advisors. Their work experiences range from Harvard to Stanford to the Food and Drug Administration. Our database of 35,000 scientific journals spans over 4,000 microbes. Based on their knowledge, research, and work history, these experts helped us formulate the premier Happy Gut probiotic supplement.

We genuinely want you to feel better. That’s why our Ultimate Immunity probiotics come with a money-back guarantee. You shouldn’t worry about buying something that doesn’t work. Instead, worry about fixing your gut health.

Real People, Real Stories

Georgina L.

I've been in the market for a probiotic that's customized to my needs. I looked everywhere and couldn't find a single company doing this. Then I came across Thryve and it's awesome that they tailor the probiotics based on my needs. I suffer from a terrible storm of autoimmune issues that caused several flareups over the years (Eczema, Mercury toxicity, Fibromyalgia, and Celiac Disease). After taking Thryve probiotics I noticed a change in my frequency and severity of my flareups. Love that I can fell normal again!

Roger P.

I deal with seasonal allergies almost year round. Unfortunately, this leaves me with dry eyes, chronically stuffed nose, itchy skin, and much more. Thryve is the first probiotic that I ever used that helped but my seasonal allergies in remission. Couldn't be happier with their product.

Emma S.

From my sister with Crohns, to my brother with Eczema, my entire family is plauged with autoimmune diseases. After trying Thryve my flareups have been much less frequent and don't seem to last as long. I've had my entire family on these probiotics and it's helped them a lot!

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