Is PHGG better than psyllium?

For everyday use, PHGG is usually easier to stick with: it dissolves completely clear, is low-FODMAP-friendly and gentler than psyllium, and is a stronger prebiotic, studied for both constipation and loose stools. Psyllium works well too but gels into a sludge, can cause early gas, and most people quit it. Since fibre only works if taken daily, PHGG often wins on compliance.

What is PHGG (partially hydrolysed guar gum)?

PHGG is guar fibre broken down into shorter chains so it dissolves invisibly in liquid and ferments slowly in the colon. This makes it a strong, gentle prebiotic that selectively feeds beneficial gut bacteria. The branded form is Sunfiber.

Is PHGG good for IBS?

PHGG is low-FODMAP-certified and less gas-forming than many fibres, so it is generally well tolerated by sensitive guts and is studied in IBS for normalising bowel transit, helping with both constipation and loose stools. Start low and increase gradually.

How much PHGG should I take per day?

Studies commonly use around 5g per day, a realistic and sustainable daily amount. Take it with water and increase gradually over a week or two to let your gut adjust.

Does PHGG cause gas or bloating?

PHGG is gentler than most fibres and low-FODMAP-friendly, so it causes less gas at effective doses. Any fibre can cause temporary gas if increased too quickly, so ramp up gradually and stay hydrated.

Gut, simply

PHGG vs psyllium: which daily fibre?

Isabgol (psyllium) is India's default fibre. PHGG is what most people should probably take instead. Here's the honest comparison.

Short answer: Both are soluble fibres that work. Psyllium (isabgol) is cheap and well-proven for regularity but gels instantly, can cause early gas, and most people quit it. PHGG (partially hydrolysed guar gum) dissolves completely clear, is a truer prebiotic, is low-FODMAP-friendly and gentle at ~5g/day — so it's the one most people will actually keep taking daily. For everyday gut health, PHGG usually wins on compliance, which is what makes any fibre work.

First — what these two fibres are

Both are soluble fibres, but they behave very differently. Psyllium (isabgol, from Plantago husk) is a bulk-forming fibre that absorbs water and swells into a gel. PHGG (partially hydrolysed guar gum; the branded form is Sunfiber®) is guar fibre broken down into shorter chains — so it dissolves invisibly and ferments slowly and gently in the colon, which is what makes it a strong prebiotic.

Psyllium: effective, but hard to live with

Psyllium is genuinely well studied — for constipation, regularity and even cholesterol. The problem isn't whether it works; it's whether you'll keep using it. It thickens instantly into a gel most people can't stand drinking, it can cause gas and cramping in the first weeks, and it must be taken with plenty of water or it can do the opposite of what you want. Real-world compliance collapses within a few weeks — and a fibre you quit is a fibre that does nothing.

PHGG: the daily-friendly prebiotic

Dissolves completely clear — no sludge, no texture; stir it into any drink and you won't know it's there.
A truer prebiotic — it selectively feeds beneficial gut bacteria (like Bifidobacteria), and is studied for both constipation and loose stools, because it normalises transit rather than just bulking.
Gentler — low-FODMAP-certified and far less gas-forming at effective doses, so it suits sensitive guts and IBS better.
Studied at ~5g/day — a realistic, sustainable daily amount, not a giant scoop.

Head to head

	Psyllium (isabgol)	PHGG (Sunfiber®)
Texture in water	Thick gel / sludge	Dissolves clear
Prebiotic effect	Modest	Strong, selective
Gas / tolerance	Can be rough early on	Gentle, low-FODMAP
Good for	Constipation	Constipation and loose stools
Daily compliance	Low	High

Which should you take?

If you specifically need short-term relief from constipation and don't mind the texture, psyllium is fine and cheap. For everyday gut health, a sensitive stomach or IBS, and something you'll genuinely keep up, PHGG is the better daily fibre. Start around 5g/day, take it with water, and give your gut a couple of weeks to adjust.

The real difference: which one you'll still take in March

Fibre only works if it's daily — and daily only happens if it's pleasant. That's why SILT™ Mornings uses PHGG at the full 5g clinical dose in a Lemon Orange drink you'll actually look forward to, with the exact dose printed on the pack. Related: why you wake up bloated →

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