IgG Protect by Ortho Molecular Products

If your gut acts up after hard training or travel, bovine colostrum is one of the few nutrition tools with data for gut integrity and fewer sick days. It’s a practical fit if your stool secretory IgA (the antibody your gut lining secretes) is low, you get recurring loose stools on trips, or you want fewer upper‑respiratory infections in heavy training blocks. Dairy allergy is a hard stop; lactose intolerance is not, but start cautiously.

Colostrum carries IgG antibodies (proteins that recognize microbes and toxins) that can remain active in the gut and bind unwanted particles before they interact with your lining. That binding is the rationale for improvements in stool consistency and permeability seen in athletes within 4 to 8 weeks. The added lactoferrin binds iron in the gut, which makes it harder for certain bacteria to thrive and can calm inflammatory signaling. If you track labs, stool secretory IgA and Fecal Lactoferrin (a marker of intestinal inflammation, not the supplement) are the two most relevant to watch.

Use 4 capsules daily as directed, once or split twice daily. Many clinicians give colostrum away from large meals so the IgG proteins spend more time in the gut lumen, but taking it with a small snack can reduce queasiness. This is a moderate, maintenance-level amount (about 2.5 g colostrum with 13 mg lactoferrin per day). If you’re targeting a short repletion phase for travel diarrhea risk or heavy training, higher gram doses are often used short-term under guidance.

Avoid if you have a true dairy or milk-protein allergy, or a history of severe reactions to whey or casein. Discuss with your clinician if you’re immunocompromised after transplant, on biologic immunosuppressants, or pregnant or breastfeeding, since high-quality safety data are limited for those groups. If your Fecal Lactoferrin is very high or you have red-flag GI symptoms, get evaluated before using supplements.