SIBO Breath Testing in Fullerton, CA

You give a baseline breath sample, drink a measured amount of lactulose or glucose, and then collect breath at timed intervals. Microbes that ferment the substrate produce hydrogen or methane. Those gases enter the blood and leave in the breath, where the kit measures them. The pattern of the rise, and when it happens, is the result. A single number without a timeline is not the test.

SIBO breath testing takes a few hours of your morning. You do not eat during the collections, and you do not exercise through them. The review visit afterward often runs 30 to 60 minutes depending on the plan. The test itself is the longer, quieter part, done at home with a timer.

Lactulose and glucose are different substrates. Glucose is absorbed earlier in the small intestine, so it may miss a problem farther down. Lactulose travels farther and can be fermented by ordinary colon bacteria if transit is fast, which is one way a graph gets confusing. Dr. Tara Kohen picks the substrate from the question, not from whichever kit is on the shelf.

The day before is a prep diet, plain foods the instructions list, then a fast. The prep exists so leftover fermentable food does not light up the baseline. Skipping the prep is a common reason a graph is unreadable. If you cannot do the diet because of another medical need, say so before you start. A botched prep is worse than a delayed test.

A rise in hydrogen or methane after the drink means fermentation happened, and the timing suggests where along the gut that fermentation was likely. An early rise is the pattern people mean when they say small intestinal bacterial overgrowth. A late rise can be ordinary colon fermentation, especially with lactulose. Methane is associated, in many people, with slower transit and constipation. Hydrogen is often discussed with looser stools.

SIBO as a label should follow the graph and the symptoms together. Bloating that is clearly tied to meals is part of the story. Brain fog by itself is not a reason to declare overgrowth. GI-MAP stool testing looks at stool organisms and inflammation markers. It does not draw this gas curve. The two tests are allowed to disagree, and the disagreement is discussed rather than averaged.

False positives happen. A fast transit time can make colon gas look early. A prep that was not followed can raise the baseline. A substrate that does not match the question can overcall or undercall. Dr. Sani Kohen will say when the graph is messy. A messy graph is not rounded up into a treatment just so the test feels worth the fee.

Symptoms decide whether a borderline rise is acted on. A dramatic rise with a matching story is more useful than a small wiggle in someone who feels well. The lab fee is an additional cost, explained before you order, without a fictional price. A free 20-minute consultation can decide if breath testing is the right question. FRI is out of network, accepts HSA and FSA cards, and provides a superbill for the visit.

Expect a quiet morning at home with a timer, a drink that may taste plain or slightly sweet, and tubes or a device you breathe into on schedule. The prep diet the day before is part of the test. Set the day aside. Results are reviewed in person so the timing of the rise can be explained on the graph, not in a one-line message.

You should leave the review knowing whether the pattern was early, late, hydrogen, methane, or too messy to use. Next steps, if any, are matched to that pattern and to how you actually feel. A test that does not match the story is allowed to be set aside.

Out of network, superbill, HSA/FSA. The drive is unpaid. We try to earn it by not requiring you to repeat it on a blind weekly schedule. If you are improving, visits thin out. If you are not, we change the plan.

Drs. Sani and Tara Kohen are the clinicians. Use the about page and the office page before the first long drive if seeing the room helps.

Downtown Fullerton is walkable and social. Sunny Hills and the north streets climb. Cal State Fullerton adds a campus of walking, sitting, and backpacks. The 57 and the 91 decide how the day feels before anyone is injured. Neck pain after that freeway pattern is a common reason to look south. Knee pain in Sunny Hills is often the grade. Headaches get a neck exam and a screen for symptoms that should skip the clinic and go to emergency care.

Students and faculty sometimes want care that understands training, not only pain. Shoulder pain and a movement screen fit that request. We are not the campus health center, and we do not replace it for primary care.

From downtown and the campus, the 57 south to I-5 south is a typical path. From the east side, the 91 west to the 55 south can be cleaner. About 30 miles and 40 to 60 minutes to 26400 La Alameda, Suite 100, Mission Viejo, CA 92691. Hours are Monday through Thursday, 9 to 6. If you leave Fullerton at 4, you will sit. Book the earliest slot you can use.

Call (949) 312-1754 before you assume we are the right office. If your problem is urgent primary care, a closer physician is the better hour. If your problem is a stuck spine, a nerve, or a functional medicine question you have not gotten answered, the drive is something patients from Fullerton do make. The free 20-minute consultation can happen before a full workup.

The home plan is the product. McKenzie self-treatment, DNS drills, and a written limit on what to do this week should travel back up the 57 with you. Hands-on care is for the parts you cannot do alone. Disc herniation and sciatica pages explain how we think about those specifically.

Thyroid and fatigue visits are scheduled so the history is not rushed, which matters more when you will not be back tomorrow. The Fullerton chiropractor page gathers the links.