Ortho Spore IG™ by Ortho Molecular Products

If you get recurrent bloating, loose stools, or post-meal discomfort and your SIBO breath test has been positive or borderline, a spore probiotic paired with bovine immunoglobulins is a practical next step. It also fits those with gut-irritation labs like stool calprotectin (a marker of intestinal inflammation) in the low-to-moderate range, or frequent travelers who cycle antibiotics. If you’re strictly avoiding beef products, this isn’t a match.

Bacillus coagulans, Bacillus clausii, and Bacillus subtilis arrive as heat-stable spores, survive stomach acid, then “wake up” in the small intestine. There, they make lactic acid and enzymes, crowding out gas-producing species and nudging pH toward a healthier range. Serum-derived bovine immunoglobulins (IgG antibodies concentrated from bovine serum) bind bacterial fragments in the gut, which can reduce immune activation and help the barrier lining. In trials, these strategies reduced bloating and improved stool form within 4–8 weeks, with some reductions in hs-CRP (a systemic inflammation marker) in responders.

Use three capsules daily as directed, with meals or a snack. Consistency matters more than time of day. If your gut is sensitive, start with one capsule for 3–5 days, then increase weekly. Separate from oral antibiotics by at least two hours. Expect early changes in 1–2 weeks and a fair trial over 8–12 weeks; reassess symptoms and, if relevant, repeat stool calprotectin or a SIBO breath test.

Avoid if you have a known allergy to beef or bovine proteins. Spore probiotics are generally safe, but people with central lines, prosthetic heart valves, or who are severely immunocompromised should only use them under clinician supervision. Pregnancy and breastfeeding: data for bovine immunoglobulins are limited, so use only with clinician guidance. Mild gas or a temporary uptick in bloating the first week is common; titrate more slowly if that happens.