| Approach | Best used when | What to watch for | Notes |
|---|---|---|---|
| Gradual fiber increase | Constipation tendency, low plant intake, inconsistent meals | Going too fast can increase gas/bloating | Soluble fiber is often better tolerated for IBS-like patterns. (niddk.nih.gov) |
| Low FODMAP (short trial) | Symptoms correlate with certain carbs; frequent bloating | Complexity; risk of overly restricting long-term | Often framed as elimination + reintroduction to personalize. (journals.lww.com) |
| Fermented foods | You tolerate them well and want food-based microbiome support | Portion size; some products may be heat-treated | Start low, go slow; not all fermented foods have live cultures. (nutritionsource.hsph.harvard.edu) |
| Reducing ultra-processed foods | Fiber intake is low; frequent packaged snacks/meals | Perfectionism—aim for swaps, not “all-or-nothing” | Often improves the “fiber gap” and supports gut routines. (med.stanford.edu) |
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