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Is your gut feeling out of sorts? Our SITZMARKS test is a safe, simple, and reliable tool to help you and your healthcare provider evaluate your digestive health. Have you been experiencing issues such as constipation or irregularity? It might be time to ask your doctor for a "Gut Check." A "Gut Check" using SITZMARKS is a safe transit time test, which begins with simply swallowing one capsule. 

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