Medical disclaimer: GutVerdict summarizes what people say about supplements on Reddit. It is not medical advice, and nothing here is meant to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the Food and Drug Administration. Talk to your doctor or pharmacist before starting a supplement, especially if you are pregnant, take medicines, or have a medical condition. New, severe or worsening symptoms (such as blood in the stool, weight loss, fever, or night-time symptoms) need a doctor, not a supplement. Full disclaimer.

PHGG (Sunfiber) vs Inulin / FOS

On Reddit, owners rate PHGG (Sunfiber) higher overall (3.9 vs 3.5). Scores summarize self-reported experiences and are not evidence that either will work for you.

	PHGG (Sunfiber)	Inulin / FOS
Type	powder	powder
GutVerdict score	3.9	3.5
Owner sentiment	3.7	3.2
Recommendations	3.4	2.4
Tolerability	4.7	4.5
Owner comments	507	131
Rated comments	202	44
Unwanted effects reported	9%	11%
Top praise	Dose & timing, Bloating & gas	Dose & timing, Stool form
Top complaints	Side effects, Bloating & gas	Bloating & gas, Side effects

By symptom

Context	PHGG (Sunfiber)	Inulin / FOS
IBS-C & constipation	40 of 51 positive	7 of 9 positive
IBS-D & loose stools	15 of 18 positive	5 of 6 positive
Bloating & gas	37 of 47 positive	6 of 14 positive
SIBO	107 of 137 positive	7 of 13 positive
After antibiotics	25 of 33 positive	Too few comments
Stool form	5 of 8 positive	Too few comments
Pain & cramping	11 of 22 positive	3 of 8 positive

Not sure which fiber to try? See soluble fiber types explained. People often report bloating early on; see how to start a fiber supplement slowly. For quick shortlists by symptom, see which gut supplements IBS communities rate highest.

What owners say about PHGG (Sunfiber)

4/5
“PHGG with water. These all have really helped me.”

owner comment via r/SIBO · 2026-06-21 · 11 upvotes

4/5
“I Figured out the motility issues 2 years ago and what helped me is phgg sunfiber before lunch, a cup of stash ginger tea for lunch and dinner.”

owner comment via r/SIBO · 2026-05-26 · 10 upvotes

5/5
“I think personally best thing to do is take Inulin, phgg, diverse fiber diet..”

owner comment via r/Microbiome · 2025-11-14 · 8 upvotes

Full PHGG (Sunfiber) page →

What owners say about Inulin / FOS

4/5 Bloating & gasPain & cramping
“I just started this last week: NOW Inulin from Chikory root.”

owner comment via r/Supplements · 2026-08-06 · 7 upvotes

1/5 Bloating & gasPain & cramping
“Chicory root / inulin is one of the WORST ingredients of all for me (and I suspect many others here).”

owner comment via r/IBS · 2026-09-15 · 12 upvotes

4/5 CostStool form
“I also think it's because inulin is cheap, readily available and easy to use.”

owner comment via r/Microbiome · 2026-05-14 · 10 upvotes

Full Inulin / FOS page →

Talk to a doctor or pharmacist before switching or combining supplements, particularly if you take other medicines.