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        • Designed for How Your Body Works

          Digestion, gut health, immune health, and recovery are deeply connected. WITHIN supports them together through one simple daily ritual.†

        • Daily Immune Resilience

          Effera lactoferrin and grass-fed colostrum work together to support gut and immune health, coordinated immune cell activity, and a balanced inflammatory response.†

        • Complete Biome Support

          A full tribiotic system featuring prebiotics, probiotics, and postbiotics helps nourish beneficial bacteria, support microbiome diversity, promote digestive comfort, and help maintain gut barrier integrity for better digestive health and gut wellness.†

        • Recovery & Performance

          Supports recovery from everyday physical stress while helping your body stay resilient to the demands of daily life.†

        • Better Nutrient Utilization

          Helps your body absorb and utilize nutrients more effectively, supporting digestive function so you get more from the foods and supplements you enjoy every day.†

        • Beyond Gut Health

          Supports cellular energy production, iron metabolism, and healthy hemoglobin levels to help with oxygen delivery throughout the body. It also promotes women’s health, including vaginal microbiome balance and menstrual cycle support, while helping maintain healthy skin, hair, and nails.†

        Effera Bio-Identical Lactoferrin

        Nature’s First Defense. Refined by Science.

        Inspired by one of nature’s most powerful biological systems: human breast milk, Effera delivers a concentrated source of human-equivalent lactoferrin in a highly bioavailable form.
        • Delivers 25x more lactoferrin than standard bovine colostrum products, helping take the benefits of traditional colostrum further.*†
        • Demonstrates up to 2x greater support to regulate the body’s inflammatory response**†
        • Produced through precision fermentation and modeled after a key protein naturally found in human breast milk
        • Delivers 200mg of lactoferrin per serving
        • Contains 690+ amino acids that mirror the structure of native human lactoferrin
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        What’s Inside

        Complete 5-in-1 Microbiome + Immune Support

        Effera Lactoferrin
        200mg of human-equivalent lactoferrin modeled after a key protein naturally found in human breast milk. It supports a healthy gut environment, immune function, nutrient utilization, recovery, a healthy inflammatory response, and overall microbiome health, including women’s vaginal flora balance.†
        Grass-Fed Colostrum
        1g of cold-processed, grass-fed bovine colostrum sourced with a calf-first commitment. Carefully processed to help preserve naturally occurring bioactive compounds, including immunoglobulins (IgG), peptides, and growth factors that support immune health, digestive wellness, and recovery.†
        Complete Tribiotic System
        • Prebiotics: 3g of fiber to nourish beneficial bacteria and help support microbiome diversity, digestive comfort, and a healthy gut ecosystem.†
        • Probiotics: 8 Billion CFU at time of manufacture from targeted strains that help support microbiome balance, digestive health, and regularity.†
        • Postbiotics: Heat-inactivated microorganisms that support gut barrier integrity, a healthy gut environment, and immune signaling.†

        Why Effera Is Different

        25X More

        More lactoferrin than leading colostrum brands*

        2X Greater

        Healthy inflammatory response modulation**†

        200mg

        Human-equivalent lactoferrin per serving

        690+

        Amino acids matching native human lactoferrin

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        Five Systems. One Daily Ritual.

        Common Questions

        What is WITHIN?
        WITHIN is an advanced daily 5-in-1 microbiome + immune support system designed to support gut health, immune health, recovery, and overall wellness. It combines Effera lactoferrin with grass-fed bovine colostrum and a complete tribiotic system of prebiotics, probiotics, and postbiotics in one convenient daily scoop to provide a more complete approach to microbiome support.†
        Most gut health products focus on a single layer—such as probiotics or fiber. WITHIN is designed to support multiple interconnected systems by combining a full tribiotic foundation with grass-fed colostrum and Effera lactoferrin, helping support digestion, immune function, recovery, and performance in one daily serving.†
        No. While WITHIN includes probiotics, grass-fed bovine colostrum, and a complete tribiotic system, it's powered by Effera lactoferrin, a precision-made, human-equivalent form of one of the body's most important protective proteins. Each serving delivers 200mg of Effera lactoferrin, 25x more lactoferrin than leading colostrum brands,* creating a more comprehensive approach to gut health, immune health, recovery, and microbiome support.†
        Your microbiome is a complex ecosystem of beneficial bacteria that plays an important role in digestive health, immune function, nutrient utilization, and overall wellness.

        WITHIN helps support a healthy, balanced gut microbiome through its combination of Effera lactoferrin, colostrum, prebiotics, probiotics, and postbiotics, providing a more complete approach to microbiome support.†
        Prebiotics, probiotics, and postbiotics each play a different role in supporting gut health and microbiome balance. Prebiotics nourish beneficial bacteria, probiotics are beneficial bacteria that help support microbiome diversity, and postbiotics help maintain a healthy gut environment. Together, they provide a more complete approach to digestive wellness and microbiome support.
        Effera is a pioneering, human-equivalent form of lactoferrin—a key bioactive protein naturally found in human breast milk. Produced through precision fermentation technology, it brings cutting-edge nutrition science to four essential areas of everyday wellness: immune function, a healthy gut environment, nutrient utilization, and recovery from physical stress.†
        Lactoferrin plays an important role in supporting immune health, iron balance, nutrient utilization, and the body’s natural defense systems. WITHIN includes 200mg of Effera lactoferrin to help support these functions as part of a complete daily wellness system.†
        Colostrum contains naturally occurring bioactive compounds, including immunoglobulins (IgG) and growth factors, that help support immune health, digestive wellness, and recovery from physical stress. WITHIN features grass-fed bovine colostrum that is cold-processed to help preserve its naturally occurring bioactive compounds and bioavailability, glyphosate free, and ethically sourced with a Calf Nourished First promise that ensures calves receive the nourishment they need before any colostrum is collected. We then paired it with Effera®️ lactoferrin as part of our complete gut and immune support system, combining nature's original superfood with a human-equivalent lactoferrin inspired by one of nature's most powerful biological systems. We didn't just make colostrum better. We unlocked its most powerful component and amplified it.
        Your gut and immune system are closely connected. A healthy microbiome helps support immune function, which is why WITHIN supports both gut health and immune health together rather than treating them separately.†
        Individual experiences may vary. Some people may notice digestive support relatively quickly, while broader system-level benefits are typically associated with consistent daily use over time.†
        Yes. WITHIN is designed as a foundational daily system to support ongoing gut health, immune health, recovery, and overall wellness—even if you’re not currently experiencing specific concerns.†
        WITHIN is designed for individuals ages 4 and older who want to support digestive health, immune function, and recovery through one simple daily routine. It’s ideal for those seeking digestive comfort and microbiome balance, individuals looking to support immune health, active people focused on recovery and resilience, and anyone looking to simplify and upgrade their wellness routine.†

        Children under the age of 18 should use WITHIN under adult supervision. Women who are pregnant or breastfeeding, and individuals with a medical condition or taking medication, should consult a healthcare professional before use.
        Yes. Powered by Effera lactoferrin, WITHIN supports women’s health, including vaginal microbiome balance and menstrual cycle support. Effera also supports immune function and healthy iron metabolism, helping optimize iron availability and healthy hemoglobin levels to support oxygen delivery, energy, and overall vitality.†
        Mix 1 scoop with 8 fl oz of water or your preferred beverage and enjoy once daily. For additional support, you may enjoy up to two servings per day. WITHIN can be taken any time of day, with or without food. Consistency is key.
        Yes. WITHIN can be taken alongside most supplements and wellness products. In fact, its complete 5-in-1 formula combines Effera lactoferrin, grass-fed bovine colostrum, and a full tribiotic system into one convenient daily scoop, helping simplify your supplement stack while supporting gut health, immune function, recovery, and overall wellness.†
        WITHIN contains bovine colostrum. Individuals with dairy sensitivities should review the ingredient list and consult a healthcare professional if needed.
        WITHIN is designed for daily, ongoing use as part of a long-term wellness routine.
        WITHIN's Passionfruit Guava flavor delivers a light tropical taste with bright passionfruit notes, subtle guava sweetness, and a clean, refreshing finish.

        † This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

        * 25x comparison refers specifically to lactoferrin content vs. standard bovine colostrum

        ** 2x comparison based on human immune cell studies comparing Effera®️ lactoferrin to bovine lactoferrin.

        †††Transparency and accuracy are a top priority at Isagenix. We constantly strive to ensure that product information is complete, accurate, and current. The facts panels displayed on our website are for convenience and the actual product and supplement or nutrition facts may vary slightly due to the availability of ingredients or changes to the manufacturing process.  Please review the facts panel included on the label for each product received to ensure the product meets your dietary and supplementation needs.

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