Best Tube Probiotics Digestive Supplements in 2026

SOIL-BASED PROBIOTICS: Before the widespread nutrient depletion of soil and the use of preservatives on fruits and vegetables, we obtained the probiotics we needed for a balanced gut from the soil. Those ancient hearty strains of probiotics, called SBO, are what we use in Smarter Gut Health.

3 POWERFUL PROBIOTIC STRAINS: We use a powerful blend of three top soil-based probiotic strains, Unique IS-2 Bacillus Coagulans, Bacillus Subtilis, and Bacillus Clausii. They are all highly resilient to stomach acid and able to survive the lengthy journey through the digestive tract to colonize in the intestines.*

CLEAN SOFTGELS FOR LONGER SHELF LIFE & BETTER ABSORPTION: Rather than using synthetic polymer coatings to preserve our products, we deliver our naturally shelf-stable probiotics in a clean, natural softgel, free of the coatings, binders, and fillers utilized by other formulas.*

CLEAN SOFTGELS FOR LONGER SHELF LIFE & BETTER ABSORPTION: Rather than using synthetic polymer coatings to preserve our products, we deliver our naturally shelf-stable probiotics in a clean, natural softgel, free of the coatings, binders, and fillers utilized by other formulas.*

INCLUDES PRETICX PREBIOTIC: Prebiotics are specific types of fiber that serve as food for probiotics. Like the probiotics in Smarter Gut Health, the premium prebiotic we use called PreticX is designed to work quickly and withstand heat and stomach acid.*

HEALTHY FATS FOR DIGESTIVE SUPPORT: Smarter Gut Health emulsifies spore-forming probiotic strains in a combination of two fat sources: MCT oil and flaxseed oil. This delivery method supports absorption.*

ANTIOXIDANT COMPLEX TO SUPPORT SKIN HEALTH: Our unique blend of support ingredients includes blueberry, crowberry, and black currant extracts along with green tea, vitamin E, and black walnut to promote the health of skin cells from within.*

PLANT-BASED COLLAGEN PRODUCTION BOOSTERS: Smarter Nutrition’s skin collagen includes natural collagen production boosters like quercetin, chlorogenic acid, marigold flower, and vitamin C to provide nutrients and enhance our marine collagen blend.*

UNIQUE BIOAVAILABLE MARINE COLLAGEN BLEND: Smarter’s Marine Collagen comes exclusively from fresh fish sustainably sourced from the deep, clean pristine waters of the South Pacific – the cleanest source of any collagen. Marine collagen is the most abundant source of type 1 collagen, and has the smallest particle size of all collagens for superior absorption.*

THE PERFECT VITAMIN D FORMULA: Your First Line of Defense. Smarter Nutrition has pioneered the clean and active Vitamin D3 supplement that big-name store brands SHOULD be selling! It’s the optimal blend of ingredients for safety and maximum benefits!

PREMIUM PLANT-BASED VITAMIN D3: The Most Absorbable and Active Form. Unlike other Vitamin D supplements that contain processed animal by-products, Smarter Nutrition’s Vitamin D3 comes from the most premium plant source of active Vitamin D3. It’s sustainably sourced from a nutrient-rich organism called lichen – a vitamin D3 source that’s naturally free from contaminants and animal-derived ingredients.

ESSENTIAL VITAMIN K2 COMPLEX: Vitamin D has a dependent relationship with vitamin K2, and vitamin D toxicity can be caused by a deficiency in vitamin K2. The benefits of vitamin D3 are greatly enhanced by the presence of vitamin K2 in terms of bone strength, cardiovascular health, and more.

SOIL-BASED PROBIOTICS: Before the widespread nutrient depletion of soil and the use of preservatives on fruits and vegetables, we obtained the probiotics we needed for a balanced gut from the soil. Those ancient hearty strains of probiotics, called SBO, are what we use in Smarter Gut Health.

3 POWERFUL PROBIOTIC STRAINS: We use a powerful blend of three top soil-based probiotic strains, Unique IS-2 Bacillus Coagulans, Bacillus Subtilis, and Bacillus Clausii. They are all highly resilient to stomach acid and able to survive the lengthy journey through the digestive tract to colonize in the intestines.*

INCLUDES PRETICX PREBIOTIC: Prebiotics are specific types of fiber that serve as food for probiotics. Like the probiotics in Smarter Gut Health, the premium prebiotic we use called PreticX is designed to work quickly and withstand heat and stomach acid.*

SOIL-BASED PROBIOTICS: Before the widespread nutrient depletion of soil and the use of preservatives on fruits and vegetables, we obtained the probiotics we needed for a balanced gut from the soil. Those ancient hearty strains of probiotics, called SBO, are what we use in Smarter Gut Health.

3 POWERFUL PROBIOTIC STRAINS: We use a powerful blend of three top soil-based probiotic strains, Unique IS-2 Bacillus Coagulans, Bacillus Subtilis, and Bacillus Clausii. They are all highly resilient to stomach acid and able to survive the lengthy journey through the digestive tract to colonize in the intestines.*

CLEAN SOFTGELS FOR LONGER SHELF LIFE & BETTER ABSORPTION: Rather than using synthetic polymer coatings to preserve our products, we deliver our naturally shelf-stable probiotics in a clean, natural softgel, free of the coatings, binders, and fillers utilized by other formulas.*