Around 42 million Americans are constipated at any given time, and almost none of them want to talk about it. Peak BioBoost is a flavorless prebiotic fiber powder that dissolves in your morning coffee. Four fibers, a little magnesium, no taste, no gel. It's not a laxative and it won't work by tomorrow. Give it a week and it may quietly change your mornings.
From $29.95/jar • Free Shipping on 6 Jars • 90-Day Guarantee
Peak BioBoost is a fiber powder made by Peak Biome in Austin, Texas. One scoop gives you 8 grams of prebiotic fiber from four sources (acacia gum, FOS, inulin from Jerusalem artichoke, and XOS) plus 40 mg of magnesium citrate. You stir it into coffee, tea, a smoothie, whatever. It dissolves in a few seconds and doesn't taste of anything. The point of the fibers is to feed the bacteria in your large intestine; the point of the magnesium is to take some of the tension out of the gut muscles. It's non-GMO, made in an FDA-registered GMP facility, and comes with a 90-day refund that covers empty jars. The ingredients page goes through each one.
Every order backed by 90-day money-back guarantee.
30-Day Supply
+ $9.95 S&H • $1.66/serving
Add to Cart90-Day Money-Back Guarantee
180-Day Supply
FREE U.S. Shipping! • $0.99/serving
Total: $179.70 • SAVE $120!
Add to Cart — Best Deal90-Day Money-Back Guarantee
90-Day Supply
SAVE $30!
+ $9.95 S&H • $1.33/serving
Add to Cart90-Day Money-Back Guarantee
I've never met anyone whose constipation was caused by a shortage of laxatives, which is odd, because that's what most people reach for. Usually the problem is one of three things. The bacteria in your colon aren't getting enough of the right fiber to produce the compounds that keep things moving. Or stool is sitting too long and drying out. Or the gut wall itself is tense, from stress, dehydration or a medication side effect, and won't let go. A laxative addresses none of those. It forces a result today and leaves the cause untouched for tomorrow.
Peak BioBoost is aimed at the causes. The four fibers (there's a good review of how prebiotics work at PMID 17221839) are food for Bifidobacteria and Lactobacilli, and when those are well fed they produce short-chain fatty acids that soften stool and speed transit. The magnesium citrate (PMID 28248558) relaxes intestinal muscle and pulls a little water into the colon. What you're supposed to get is not a sprint to the bathroom but an ordinary, unhurried bowel movement at roughly the same time each day.
Made in the US by Peak Biome. One scoop in your coffee. No taste, no texture. If ninety days from now your mornings are no different, you send the jars back, empty ones included, and get your money back.
See All Peak BioBoost IngredientsYou've probably done this already. You bought a tub of fiber, stirred it into water, and watched it turn into something with the texture of wallpaper paste. You drank it quickly so you wouldn't have to think about it. Then you spent the afternoon wondering when the gas would stop. Or you tried the gummies, which taste fine and produce so much wind you couldn't leave the house. That's most people's fiber story, and it ends the same way: you quit after a week, because nobody's going to drink sludge every morning for the rest of their life.
Peak BioBoost gets round that in the most basic way possible: you can't taste it or feel it. It goes into coffee and disappears. And because it's four different prebiotic fibers rather than one bulk-forming one, it tends to produce a lot less gas than psyllium. That's the whole reason people stick with it, and sticking with it is the whole reason fiber works. The company says more than 12,000 people have switched to it and rate it 4.8 out of 5, which is their number, not mine, but the reviews I've read fit the pattern.
Acacia, FOS, inulin and XOS each feed slightly different bacteria. Between them they cover the Bifidobacteria and Lactobacilli that do most of the work in the colon.
Soluble fiber holds water. Stool that holds water is soft and easy to pass, which means no straining and no half-finished feeling.
FOS and XOS in particular shorten transit time. The longer stool sits in the colon, the more water gets pulled out of it, so faster transit means softer output.
Forty milligrams of magnesium citrate. Not enough to act as a laxative on its own (that takes ten times as much), but enough to help a tense gut relax.
Dried sap from the acacia tree. The gentlest fiber in the formula and the one least likely to cause gas.
Short chains of fructose your body can't digest, so they go straight to your gut bacteria. Well tolerated at these doses.
The same fiber found in chicory, garlic and onions, here from Jerusalem artichoke. The most-studied prebiotic there is.
A newer prebiotic that shifts gut bacteria at surprisingly small doses. Has trial data for stool frequency.
The ingredient most fiber supplements leave out. Relaxes the gut wall and draws a little water into the colon.
This is the line that shows up in more reviews than any other: "I go every morning now." Regular, predictable, no planning.
Slow transit means more fermentation, which means more gas and a belly that's tight by evening. Faster transit takes a lot of that away.
Carrying a backed-up colon around all day is tiring in a way that's hard to describe until it stops. Several reviewers mention energy without being asked.
You stop doing the mental arithmetic about which foods will cause trouble three days from now.
The bacteria this feeds also produce vitamins and short-chain fatty acids, and crowd out species you'd rather not have.
Flavorless, dissolves in seconds, no grit. This sounds trivial and it's the reason people are still taking it in month six.
The company's figure is 12,000-plus customers. Most of them found out about it the same way you did: something else didn't work.
Get Peak BioBoost — From $29.95/JarNew favorite thing in my morning coffee. I honestly cannot tell it's in there. I've done psyllium, Metamucil, the gummies, all of them either tasted awful or gave me gas. This just works quietly in the background. My sugar cravings have dropped too, which I didn't expect and can't fully explain.
About a month in. One scoop in my coffee, forgotten by the first sip. My digestion has been really consistent, which after years of a two-days-nothing-then-chaos pattern feels strange in a good way. No gas, no bloating, no urgency. Just regular.
I've had digestive problems most of my life and I've tried everything you can buy. This is the first thing where I'm regular every day and the bloating is going down. On my second order. I didn't write reviews for anything before this one.
You get ninety days. If your mornings haven't changed, if you're still bloated, if you still dread the bathroom, send the jars back for a full refund. They'll take empty ones. There's no form to fill in and no argument to have.
Peak BioBoost was made by someone who was constipated. Jeremy, who founded Peak Biome, spent years going through every fiber, laxative and gut-health product on the shelf, getting either nothing or side effects he wasn't willing to live with. He eventually worked with nutritionists and gastroenterologists to put together a formula around four specific prebiotic fibers, feeding the gut rather than forcing it. He describes it as the thing he wished had existed ten years earlier.
Peak Biome is in Austin, Texas. The powder is made in an FDA-registered, GMP-certified facility in the US from non-GMO, plant-based ingredients, with nothing artificial and no stimulant laxatives. The 90-day guarantee is longer than it needs to be, which I read as the company being fairly sure most people will keep it.
How to take it: one scoop in whatever you're already drinking or eating in the morning. Coffee, tea, a smoothie, porridge, yogurt. It dissolves in seconds. Start with half a scoop for the first three days so your gut can adjust, then go to a full one.
When to expect what: most people notice they're more regular somewhere between day three and day seven. Bloating usually eases over two to three weeks. The bacterial shift that makes it stick takes four to eight weeks. The 90-day refund covers all of that with a month to spare.
Side effects: some people get mild gas for the first two or three days while their bacteria catch up with the extra fiber. Starting on half a scoop keeps that to a minimum. It's not a laxative, so there's no urgency and nothing to become dependent on. If you have a diagnosed bowel condition or take medication whose absorption fiber could affect, ask your doctor first.
Three things. It has no taste or texture, so you'll actually keep taking it. It uses four prebiotic fibers that feed your gut bacteria rather than one bulk fiber that just adds volume. And it includes 40 mg of magnesium citrate to relax the gut wall, which psyllium products don't address. The comparison page puts them side by side.
Most people are more regular within three to seven days. Bloating tends to ease over two to three weeks, and the bacterial shift that makes it stick takes four to eight. Start on half a scoop for three days. The 90-day refund gives you plenty of time to judge.
For most people who take it daily, yes. All four fibers have published research on gut bacteria and regularity, magnesium citrate is well documented for relaxing intestinal muscle, and the company reports a 4.8-star average across 12,000-plus customers. It won't work overnight and it isn't a laxative. If it doesn't work for you, the 90-day refund covers empty jars.
No. Laxatives force a bowel movement by stimulating the gut or flooding it with water, and your body can come to depend on them. Peak BioBoost is prebiotic fiber plus a small amount of magnesium: it feeds bacteria and softens stool, and it works gradually with no urgency and no dependency.
Yes, under the Peak Biome brand. The official website is usually cheaper on the 3- and 6-jar packs and the full 90-day guarantee applies to official orders, so I'd buy direct.
One jar is $49.95 plus $9.95 shipping. Three jars are $39.95 each plus $9.95 shipping. Six jars are $29.95 each with free shipping, which works out at about a dollar a day. Every pack carries the 90-day money-back guarantee. Details on the pricing page.
With other supplements, generally yes; prebiotic fiber pairs well with probiotics. With medication, be aware that fiber can slow absorption of some drugs, so take medication an hour before or two hours after your scoop, and check with your doctor if you're on prescriptions.
If you're tired of the pattern (nothing for days, then an emergency, then nothing again), Peak BioBoost is aimed at why your gut is stuck rather than at forcing it. Four fibers feed the bacteria that regulate transit. Magnesium eases the muscle that's holding on. And because it's flavorless, you'll actually take it, which is the part every other fiber product gets wrong.
You'll know within a week or two. There's a specific morning most reviewers describe, where you go without thinking about it, without straining, without any of the usual dread. If that morning doesn't arrive in ninety days, you've lost nothing. One scoop, any drink, every morning.
90-day guarantee · Free shipping on 6 jars · Secure checkout