Keep Lean Flow

11 ingredients. One scoop. Built specifically for GLP-1 medication users.

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Why Your GLP-1 Stopped Everything (And How to Get It Moving Again)

3 min read · Updated May 2026 · Reviewed by Keep Lean Research

★★★★★ Rated 4.9 | Trusted by 11k+ GLP-1 Users' Members across the US | 60 Day Guarentee

24%

of GLP-1 users report constipation as a persistent side effect. It is the second most common reason people reduce their dose, skip injections, or quit their medication entirely. Unlike nausea, which often improves over time, constipation tends to persist for as long as you're on the medication.

"My constipation has a specific, mechanical cause."

You used to be regular. Maybe not clockwork, but close enough. You didn't think about it. It just happened.

Then you started your GLP-1.

At first you didn't notice. You were focused on the weight loss, the appetite changes, adjusting to the medication. But by week two or three, you realized: it had been four days. Then five. Then six.

You tried MiraLAX. Maybe it helped a little, then stopped. You drank more water. You ate more fibre. You Googled "constipation on Ozempic" at 11pm and found a thousand Reddit threads from people going through the same thing.

Nobody warned you about this at the pharmacy. And nobody explained why it was happening.

1

Reason Why It Happens

Your GLP-1 medication works by mimicking a hormone that slows gastric emptying. But the slowing doesn't stop at your stomach. It affects your entire gastrointestinal tract.

Intestinal motility — the rhythmic contractions that move waste through your colon — drops significantly. The muscles in your intestinal wall contract less frequently and with less force. Waste sits in your colon longer. The longer it sits, the more water your colon absorbs from it. The stool becomes hard, dry, and difficult to pass.

This is why drinking more water alone doesn't fix it. You're hydrating your body, but the water gets absorbed before it reaches the stool because transit time is so slow.

This is also why fibre can actually make it worse. Fibre adds bulk, which is helpful when things are moving. But when motility is medically slowed, adding bulk to a system that's already backed up creates more pressure, more bloating, and more discomfort without relief.

The root cause isn't diet. It's not dehydration. It's mechanically slowed intestinal motility caused by the medication itself.

What Doesn't Work (And Why)

MiraLAX (polyethylene glycol) draws water into the colon. It can help short-term, but it's designed for occasional constipation in people with normal motility. On a GLP-1, your motility is medically suppressed. MiraLAX addresses the symptom (dry stool) without addressing the cause (slow transit). Most GLP-1 users find it works for a few days then stops being effective.

Stimulant laxatives (Dulcolax, senna) force the intestinal muscles to contract. They work, but they're not meant for daily use. Over time, your intestines become dependent on the stimulant and stop contracting on their own. This creates a rebound effect where constipation gets worse when you stop taking them.

Fibre supplements (Metamucil, psyllium) add bulk. In a normal gut, bulk triggers peristalsis. In a GLP-1 gut with suppressed motility, bulk sits there. More bulk in a slow system equals more bloating, more gas, and more discomfort. Many GLP-1 users report fibre making their constipation worse, not better.

The magnesium from Amazon is almost certainly magnesium oxide. It's the cheapest form. It has roughly 4% bioavailability — meaning 96% of what you swallow passes through without being absorbed. It can cause diarrhea (not the same as healthy motility) and cramping. It doesn't support the underlying mechanism you need.

The Fix

What Actually Works. Two ingredients, at the right dose and in the right form, address GLP-1 constipation at the source.

Ingredient 1

Magnesium Citrate — 280mg

40mg Elemental · Osmotic Form

Magnesium citrate is an osmotic agent. It works by drawing water into the intestinal lumen through osmosis. When water enters the intestines, it softens stool and increases intestinal volume, which gently stimulates peristalsis — the natural wave-like contractions that move waste through your colon.

Unlike stimulant laxatives, magnesium citrate doesn't force your muscles to contract artificially. It creates the conditions for your body's own motility to work. No dependency, no rebound effect, no cramping.

The key is consistent daily intake. A single large dose causes a flush. A moderate daily dose — like the 280mg compound (40mg elemental) in Keep Lean — provides gentle, steady osmotic support that builds regularity over days, not hours.

This is why the form matters. Magnesium oxide barely absorbs and causes unpredictable diarrhea. Magnesium citrate has high osmotic activity specifically in the intestines, which is exactly what a GLP-1 gut needs.

Ingredient 2

Magnesium Glycinate — 175mg

20mg Elemental · Bioavailable Form

While citrate works locally in the intestines, glycinate works systemically. Magnesium glycinate is the most bioavailable form of magnesium, meaning it crosses the intestinal wall efficiently and enters your bloodstream.

Why does this matter for constipation? Because magnesium deficiency itself contributes to poor motility. Magnesium is required for smooth muscle function throughout your body, including the muscles that line your intestinal wall. When you're eating 40% less food on a GLP-1, your dietary magnesium intake drops significantly. The muscle contractions that move waste through your colon become weaker.

Glycinate replenishes your systemic magnesium levels. Citrate works locally in the intestines. Together, they address constipation from both directions: softening stool and drawing water in (citrate) while restoring the muscle function that moves everything through (glycinate). This is why Keep Lean uses two forms. They do two different jobs. One without the other is half the solution.

Supporting Ingredients

Triple Digestive Enzyme Blend

Lipase · Protease · Amylase

Constipation on a GLP-1 isn't just about what's not moving out. It's also about what's not being broken down properly on the way in.

When your entire digestive system is slowed, food sits in your stomach and small intestine longer. It's not being broken down efficiently. Partially digested food reaching the colon creates harder, drier stool that's more difficult to pass.

Lipase breaks down fats. Protease breaks down proteins. Amylase breaks down carbs. Better digestion upstream means softer, easier stool downstream.

Keep Lean Flow

$59.99/mo on subscription + $35 in free gifts. 60-day guarantee. Cancel anytime.

$89.99

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Purpose-Built for GLP-1

Keep Lean Flow was built specifically for this.

Not adapted from a general wellness product. Not a multivitamin with a GLP-1 label. Every one of its 11 ingredients was chosen for a specific reason that matters to someone on Ozempic, Wegovy, Mounjaro, or Zepbound.

For nausea

100mg Ginger Root (5% gingerols) + 100mg Peppermint Leaf (10:1)

For constipation

Dual Magnesium (Citrate for motility + Glycinate for absorption)

For nutrient depletion

Full Electrolyte Complex (300mg sodium + 150mg potassium) + B6 as P5P

For poor absorption

Triple Digestive Enzyme blend (Lipase + Protease + Amylase) + Artichoke Extract

One scoop. Cold water. 60 seconds every morning before coffee.

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$59.99/mo on subscription · 60-day guarantee · Cancel anytime

The people who see the best results take it daily, including on good days. Prevention beats treatment. By the time nausea shows up, the fermentation has already started. The point is to stop it before it starts.

Keep Lean Flow

$59.99/mo on subscription + $35 in free gifts. 60-day guarantee. Cancel anytime.

$89.99

See What's Inside →

60-Day Money-Back Guarantee

Take it every morning for 60 days. If you don't notice a meaningful difference in your regularity, your digestion, and how you feel on your GLP-1, email support@keeplean.store for a full refund. No return required. No questions.

Less than 0.5% of buyers use this guarantee.

Keep Lean is a dietary supplement, not a medication. It is not intended to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the FDA. Consult with your healthcare provider before starting any new supplement, especially if you are taking prescription medications. Individual results may vary.

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