I. PHGG (The Low-FODMAP Favorite)

PHGG is a unique soluble fiber derived from the guar bean, treated with enzymes to reduce its viscosity and gas-producing potential.

• Fermentation Profile: It is slowly fermented by gut bacteria. Unlike other fibers, it produces very little gas, making it the "gold standard" for those with SIBO or IBS.

• Action: It acts as a true prebiotic, selectively feeding Beneficial bacteria (Bifidobacteria and Lactobacilli) while improving stool consistency for both constipation and diarrhea.

• Texture: Completely odorless, tasteless, and dissolves fully in water without thickening.

II. Psyllium Husk (The Bulking Agent)

Psyllium is a mucilaginous fiber that absorbs significant amounts of water to form a thick gel.

• Fermentation Profile: It is minimally fermented, meaning it doesn't feed gut bacteria as aggressively as PHGG. Most of its benefits come from its mechanical action.

• Action: Its primary strength is bulking. It creates a soft, gel-like mass that eases transit through the colon. It is highly effective for chronic constipation but can cause "fullness" or Cramping if taken with insufficient water.

• Texture: It thickens quickly and has a distinct "gritty" texture if not consumed immediately.

4. Recommended Dosages for 2026 (Strategic Dosing)

To avoid the "fiber flare-up," the following evidence-based protocols are recommended for the US market:

Pro Tip: For Sensitive Stomachs, always use the "Low and Slow" method. Start with the minimum dose for 5–7 days before increasing to allow the microbiome to adapt without gas buildup.