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I Prevail Fiber — Daily Fibre Supplement

I Prevail FiberA daily fibre supplement, and one of the least glamorous purchases you can make. It is also one of the few where most people have a genuine, measurable shortfall.[NEED LABEL] — fibre source(s), grams per serving, servings per container.Why fibre is the gap it isMost adults fall well short of recommended fibre intake, and the shortfall is more consistent than for most of the micronutrients supplements are usually sold on.It is particularly common among people who train hard. A high-protein diet built on chicken, rice, eggs and protein powder is excellent for muscle and contains almost no fibre. Add a caloric deficit — where total food volume drops — and the gap widens further.If you eat few vegetables, you are almost certainly short on fibre, and closing that gap is more consequential than most of what sits on a supplement shelf.Soluble and insoluble fibre do different jobsWorth understanding whichever fibre product you buy:Soluble fibre dissolves in water and forms a gel. That gel slows gastric emptying, which increases fullness and slows sugar absorption from a meal. It is also fermented by gut bacteria in the colon, producing short-chain fatty acids that feed the cells lining your intestine.Insoluble fibre does not dissolve. It adds bulk and holds water, which is what moves material through the digestive tract — the one associated with regularity.Most people benefit from both. [NEED LABEL] — which types this product supplies.⚠ Two things that apply to every fibre supplementWater is not optional. Fibre absorbs many times its weight in water, and psyllium in particular can form an uncomfortable mass if taken with too little fluid. Mix it with a full glass, drink it promptly before it thickens, and drink more water through the day.Space it from medication. Viscous fibres can reduce absorption of drugs taken at the same time — the gel that makes fibre effective can also trap medication. Take anything prescribed at least an hour before, or two to four hours after, your fibre. The same applies to a multivitamin or mineral supplement.Check with your pharmacist for anything you take daily.How to take it Mix with a full glass of water and drink promptly. Fibre thickens as it stands. Start with half a serving for the first week. A sudden fibre increase causes gas and bloating in most people. Ramping up gradually largely avoids it, and it settles within a week or two either way. Increase your overall water intake, not just the glass you mix it in. Daily consistency matters more than timing.Who this is for Anyone on a high-protein, low-vegetable diet — extremely common among people training seriously People in a deficit, where lower food volume means less fibre Anyone who knows their vegetable intake is not what it should be and wants a floor under it People who want a straightforward fibre product without a long ingredient listWho this is not forIf you have IBS or follow a low-FODMAP diet, check the fibre source carefully. Fermentable fibres such as inulin are common triggers; psyllium is often better tolerated. Start very low, or speak to your doctor.If you have any history of bowel obstruction or swallowing difficulty, do not take a bulk-forming fibre without medical advice.If you already take a fibre-forward greens powder such as Revive Daily Greens, or a fibre blend like Project AD Fiber+, check whether you are doubling up.And the honest one: whole food fibre is better and cheaper. Vegetables, beans, oats and fruit bring fibre alongside micronutrients and phytonutrients no powder reproduces. A supplement fills a gap — it does not replace produce, and we would rather you ate the vegetables.Stack it with: more water than you think you need.Frequently asked questionsWhat is the difference between soluble and insoluble fibre?Soluble fibre dissolves and forms a gel, slowing digestion and feeding gut bacteria. Insoluble fibre does not dissolve — it adds bulk and holds water, supporting regularity. Most people benefit from both.How much water do I need with it?A full glass to mix, drunk promptly, plus more water through the day. Taking fibre with too little fluid is genuinely uncomfortable and, with psyllium, potentially unsafe.Can I take it with medication?Space them apart — at least an hour before or two to four hours after. Fibre gels can trap medication and reduce absorption. Check with your pharmacist for anything daily.Will it make me bloated?Possibly for the first week. Start with half a serving and build up gradually.Do I still need vegetables?Yes. Whole food fibre comes with micronutrients and phytonutrients a supplement does not provide. This fills a gap rather than replacing produce.Can I take it if I have IBS?Check the fibre source. Fermentable fibres like inulin commonly trigger symptoms; psyllium is usually better tolerated. Start low or speak to your doctor. Read more

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PRODUCT LABEL

I Prevail Fiber

A daily fibre supplement, and one of the least glamorous purchases you can make. It is also one of the few where most people have a genuine, measurable shortfall.

[NEED LABEL] — fibre source(s), grams per serving, servings per container.

Why fibre is the gap it is

Most adults fall well short of recommended fibre intake, and the shortfall is more consistent than for most of the micronutrients supplements are usually sold on.

It is particularly common among people who train hard. A high-protein diet built on chicken, rice, eggs and protein powder is excellent for muscle and contains almost no fibre. Add a caloric deficit — where total food volume drops — and the gap widens further.

If you eat few vegetables, you are almost certainly short on fibre, and closing that gap is more consequential than most of what sits on a supplement shelf.

Soluble and insoluble fibre do different jobs

Worth understanding whichever fibre product you buy:

Soluble fibre dissolves in water and forms a gel. That gel slows gastric emptying, which increases fullness and slows sugar absorption from a meal. It is also fermented by gut bacteria in the colon, producing short-chain fatty acids that feed the cells lining your intestine.

Insoluble fibre does not dissolve. It adds bulk and holds water, which is what moves material through the digestive tract — the one associated with regularity.

Most people benefit from both. [NEED LABEL] — which types this product supplies.

⚠ Two things that apply to every fibre supplement

Water is not optional. Fibre absorbs many times its weight in water, and psyllium in particular can form an uncomfortable mass if taken with too little fluid. Mix it with a full glass, drink it promptly before it thickens, and drink more water through the day.

Space it from medication. Viscous fibres can reduce absorption of drugs taken at the same time — the gel that makes fibre effective can also trap medication. Take anything prescribed at least an hour before, or two to four hours after, your fibre. The same applies to a multivitamin or mineral supplement.

Check with your pharmacist for anything you take daily.

How to take it

Mix with a full glass of water and drink promptly. Fibre thickens as it stands.
Start with half a serving for the first week. A sudden fibre increase causes gas and bloating in most people. Ramping up gradually largely avoids it, and it settles within a week or two either way.
Increase your overall water intake, not just the glass you mix it in.
Daily consistency matters more than timing.

Who this is for

Anyone on a high-protein, low-vegetable diet — extremely common among people training seriously
People in a deficit, where lower food volume means less fibre
Anyone who knows their vegetable intake is not what it should be and wants a floor under it
People who want a straightforward fibre product without a long ingredient list

Who this is not for

If you have IBS or follow a low-FODMAP diet, check the fibre source carefully. Fermentable fibres such as inulin are common triggers; psyllium is often better tolerated. Start very low, or speak to your doctor.

If you have any history of bowel obstruction or swallowing difficulty, do not take a bulk-forming fibre without medical advice.

If you already take a fibre-forward greens powder such as Revive Daily Greens, or a fibre blend like Project AD Fiber+, check whether you are doubling up.

And the honest one: whole food fibre is better and cheaper. Vegetables, beans, oats and fruit bring fibre alongside micronutrients and phytonutrients no powder reproduces. A supplement fills a gap — it does not replace produce, and we would rather you ate the vegetables.

Stack it with: more water than you think you need.

Frequently asked questions

What is the difference between soluble and insoluble fibre?
Soluble fibre dissolves and forms a gel, slowing digestion and feeding gut bacteria. Insoluble fibre does not dissolve — it adds bulk and holds water, supporting regularity. Most people benefit from both.

How much water do I need with it?
A full glass to mix, drunk promptly, plus more water through the day. Taking fibre with too little fluid is genuinely uncomfortable and, with psyllium, potentially unsafe.

Can I take it with medication?
Space them apart — at least an hour before or two to four hours after. Fibre gels can trap medication and reduce absorption. Check with your pharmacist for anything daily.

Will it make me bloated?
Possibly for the first week. Start with half a serving and build up gradually.

Do I still need vegetables?
Yes. Whole food fibre comes with micronutrients and phytonutrients a supplement does not provide. This fills a gap rather than replacing produce.

Can I take it if I have IBS?
Check the fibre source. Fermentable fibres like inulin commonly trigger symptoms; psyllium is usually better tolerated. Start low or speak to your doctor.