Rooted in science.
Formulated in human biology.

Human Strain makes clearly labeled daily formulas centered on selected Bifidobacterium strains, prebiotic ingredients, and straightforward serving formats.

We prioritize ingredient transparency, clear serving formats, and product details that are easy to review. Each product page includes Supplement Facts, ingredients, directions, and purchase options.

Use the guide to explore which product format may fit your routine, then review each product’s ingredients, serving size, and directions before purchasing.

Yes. Every formula has a dedicated product page with ingredients, serving details, purchase options, and customer reviews.

Bifidobacterium is a genus of bacteria commonly discussed in microbiome research. Human Strain formulas identify the species used in each product directly on the label.

Bifidobacterium adolescentis is the species named in Human Strain’s single-strain formula. Its Supplement Facts panel lists 4 billion CFU per capsule.

The B. longum Blend is a multi-strain formula led by 8 billion CFU of B. longum alongside B. adolescentis in each capsule.

Probiotic is a term used for live microorganisms included in certain foods and dietary supplements. The Supplement Facts panel identifies the microorganism and the amount provided per serving.

A prebiotic is an ingredient that is used as a substrate by microorganisms. Human Strain identifies every prebiotic ingredient and amount on the relevant product label.

A synbiotic formula combines probiotic and prebiotic ingredients. Bifidobacterium Synbiotic combines two named Bifidobacterium species with D-ribose and xylo-oligosaccharides (XOS).

Bifidobacterium Synbiotic combines B. adolescentis and B. longum with D-ribose and XOS. The B. longum product is also a multi-strain formula, while the B. adolescentis product is a focused single-strain formula.

Bifidobacterium Synbiotic provides 16 billion CFU total probiotic activity per capsule, as listed on its Supplement Facts panel.

The B. adolescentis formula provides 4 billion CFU per capsule, while the multi-strain B. longum formula provides 8 billion CFU per capsule, as listed on their Supplement Facts panels.

D-ribose and xylo-oligosaccharides (XOS) are the prebiotic ingredients in Bifidobacterium Synbiotic. The label lists 100 mg of the Human Strain Prebiotic Blend per capsule.

Human Strain Vitalis is a clinical-grade prebiotic & bioactive vitamin blend in pomegranate grape daily packets. Its 30-day supply includes 1 g of dietary fiber, a 3,834 mg Vital Gut Blend Four, vitamin K, and B vitamins. Review its Supplement Facts panel for the complete ingredient and nutrient list.

Open one packet daily in 8–10 oz of water. The product directions recommend consistent use for 2+ months for best results.

The capsule formulas are one-capsule daily formats. Follow the directions on the individual product label.

Bifidobacterium Synbiotic and the B. longum Blend each contain 30 capsules. The B. adolescentis formula contains 60 capsules. Vitalis contains 30 daily packets.

Open the Supplement Facts and Ingredients sections on each product page. They list serving sizes, quantities, named ingredients, and directions for use.

Yes. Vitalis contains vitamin K. If you take warfarin or another vitamin K-antagonist anticoagulant, consult your healthcare professional before use.

Review the product label and consult a qualified healthcare professional before starting a dietary supplement, especially if you take medication, are pregnant or nursing, or have a health condition.

No. Human Strain products are dietary supplements and are not intended to diagnose, treat, cure, or prevent any disease.

Follow the storage instructions on the product label. Keep the product in its original packaging and review the label for the applicable directions.

Customer reviews are available on the relevant product pages. Individual experiences vary, so use reviews alongside the label and product information when making a decision.