Get 10% off with WELCOME10
Sign up for our emails and get 10% off your order with code WELCOME10 (one use per customer). We send marketing emails only to people who sign up, and every email includes a one-click unsubscribe link.
Free U.S. shipping on every order · Free 30-day returns · Real help by email





Orders are prepared in 1–3 business days and arrive 3–7 business days after they ship. Alaska, Hawaii, Puerto Rico, U.S. territories and APO/FPO/DPO addresses can take longer. You get a tracking number by email as soon as your order ships.
Free returns within 30 days of delivery: we email you a prepaid return label, no reason needed. Items must be unopened, with the manufacturer or tamper-evident seal intact, in their original packaging. Opened, used or partially consumed vitamins, minerals and supplements, items with broken or missing seals, and gift cards can't be returned. Damaged, defective, incorrect or expired items are always covered. Refunds go back to your original payment method within 10 business days of approval.
If you have a question about an item, its label or your order, email sales@naturalvitaminsonline.com with the product name or order number. We answer every message by email and reply within 1 business day (Monday to Friday, Eastern Time).
Talk to your doctor or pharmacist before starting a supplement, especially if you're pregnant or nursing, take medication, or have a medical condition.
†These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
Talk to your doctor or pharmacist before starting a supplement, especially if you're pregnant or nursing, take medication, or have a medical condition.
Natural Foundation Bacillus Subtilis BS31 is a daily probiotic supplement formulated to support digestive health and immune function, with 3 billion CFU per serving and 240 tablets for a four-month supply.
This probiotic is designed for people looking to include digestive and immune support in their everyday wellness routine. Its BS31 strain is a spore-forming probiotic, and the formula brings together a researched strain, a stated CFU amount, and a multi-month tablet supply. The intended support is centered on digestion, immune function, and a balanced gut microbiome.
It is formulated to support healthy digestion and immune function as part of a daily routine. BS31 has also been studied for supporting microbiome balance by encouraging beneficial bacteria in the digestive environment. These are the product’s intended areas of support, not a promise of a specific individual result.
BS31 is a researched, spore-forming strain of Bacillus subtilis studied for its ability to survive the digestive tract. This makes the strain’s ability to pass through the digestive tract a specific point of focus in the product’s design. The formula pairs that strain with a stated amount of 3 billion CFU per serving.
Each bottle contains 240 tablets and is presented as a four-month supply. This larger tablet quantity is intended to support a consistent daily routine over several months without needing a small bottle of tablets as often. The supplied product is in tablet form.
Natural Foundation Bacillus Subtilis BS31 is made in a GMP-certified facility. The formula has no GMOs, gluten, artificial flavors, or artificial colors, and it is free from wheat, peanuts, tree nuts, sesame, eggs, fish, and shellfish. It may contain soy, which is important to consider when reviewing the formula for dietary needs.
This supplement is suited to adults seeking a tablet-based probiotic with a researched Bacillus subtilis strain and intended support for digestion, immune function, and microbiome balance. It also fits shoppers who value a four-month supply and clear information about manufacturing and formula exclusions. Natural Foundation Bacillus Subtilis BS31 combines 3 billion CFU per serving with 240 tablets in a GMP-certified-facility-made formula.
Bacillus Subtilis
Q: How many tablets are in Natural Foundation Bacillus Subtilis BS31?
A: Natural Foundation Bacillus Subtilis BS31 contains 240 tablets per bottle, presented as a four-month supply.
Q: What is Natural Foundation Bacillus Subtilis BS31 formulated to support?
A: Natural Foundation Bacillus Subtilis BS31 is formulated to support digestive health, immune function, and microbiome balance.
Free standard shipping on every order to U.S. addresses, with no minimum. Orders are prepared in 1–3 business days and arrive 3–7 business days after they ship. Alaska, Hawaii, Puerto Rico, U.S. territories and APO/FPO/DPO addresses can take longer. You get a tracking number by email as soon as your order ships. See shipping details.
Free returns within 30 days of delivery. Free returns within 30 days of delivery: we email you a prepaid return label, no reason needed. Items must be unopened, with the manufacturer or tamper-evident seal intact, in their original packaging. Opened, used or partially consumed vitamins, minerals and supplements, items with broken or missing seals, and gift cards can't be returned. Damaged, defective, incorrect or expired items are always covered. Refunds go back to your original payment method within 10 business days of approval. See returns & refunds.
Damaged, defective, incorrect or expired item? Email your order number, a photo and the lot/expiration details to sales@naturalvitaminsonline.com and we will arrange a replacement or refund; this is always covered. Please report visible shipping damage within 7 days of delivery.
Sign up for our emails and get 10% off your order with code WELCOME10 (one use per customer). We send marketing emails only to people who sign up, and every email includes a one-click unsubscribe link.
Thanks for subscribing!
This email has been registered!