Brooks Glycerin 23 Review: Do the Changes Actually Improve the Ride?

The Glycerin line has been Brooks’s plushest, most cushioned everyday trainer for years, and the 23 pushes that further with more forefoot cushioning and a reworked knit upper. But real buyer reviews on this exact listing tell a more layered story than the marketing copy does, this version changed enough from the 22 that it split some long-time fans, even while pulling in a wave of new converts.

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Glycerin 23 Quick Verdict

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What Problem the Glycerin 23 Actually Solves

The Glycerin 23 is built for people who want maximum plush cushioning without sacrificing stability, neutral runners logging daily miles, people on their feet for long shifts at work, and anyone who’s tried a “max cushion” shoe before and found it felt mushy or unstable. Several real reviewers specifically compare it favorably to other soft-cushion shoes that collapse inward underfoot, noting the Glycerin stays supportive even at high mileage or step counts.

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Glycerin 23 Features That Matter

The nitrogen-infused DNA TUNED midsole adds 2mm more cushioning in the forefoot compared to the Glycerin 22, paired with a new triple jacquard warp-knit upper for a plusher, more breathable fit. It carries an 8mm heel-to-toe drop, a 38mm stack height, and comes in wide and extra-wide options. It’s also PDAC A5500 diabetic-shoe certified and carries the APMA Seal of Acceptance, relevant if foot health support is part of why you’re shopping for this shoe specifically.

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Glycerin 23 Real Customer Experience

Comfort is by far the most-discussed theme across actual reviews, mentioned 158 separate times with an overwhelmingly positive tilt. Buyers describe walking 18 miles the first time wearing them with zero break-in needed, and multiple reviewers with high arches, flat feet, or plantar fasciitis specifically call out the arch support as a standout feature. A nurse on her feet over 12 hours a day describes putting 10,000 to 13,000 steps daily on hers and says her legs and back stop aching the way they did in cheaper shoes.

Several buyers switched from Brooks’s own Ghost line and describe the Glycerin 23 as a genuine step up in cushioning for workouts and all-day wear, our Brooks Ghost 17 review covers that model in depth if you’re weighing the two against each other. Wide-footed buyers specifically praise the toe box for accommodating bunions and wider midfoot shapes without the pinching they’ve experienced in narrower running shoes.

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Common Glycerin 23 Complaints

Three specific, real complaints show up clearly enough to flag honestly. First, and most repeated: the toe box on the 23 runs smaller than previous Glycerin generations, several reviewers who’ve worn multiple past versions specifically note their toes now feel pinched or sliding forward even after sizing up, one reviewer described this directly as a design change that made the shoe less comfortable for her feet specifically. Second, a newer complaint tied to this year’s model: the ankle collar lining reportedly attracts dirt and debris during runs, with one reviewer saying she has to repeatedly stop mid-run to shake debris out. Third, one reviewer reported the forefoot foam breaking down within a single week of wear, in contrast to her prior Glycerin 22 pair, though this appears to be an outlier rather than a widespread pattern based on the volume of durability praise elsewhere.

Worth noting: Brooks customer support actively responds to negative reviews on this listing directly, pointing buyers toward their 90-day Run Happy Promise return policy, a real, useful safety net if sizing or fit doesn’t work out.

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Glycerin 23 Sizing

This is genuinely the section to slow down on. Feedback splits in a specific, useful way: buyers coming from previous Glycerin models most often report the 23 running smaller through the toe box than what they were used to, with several independently recommending sizing up half a size. At the same time, a solid number of buyers, including several first-time Glycerin wearers, report it fitting true to size with no issues. A UK reviewer specifically confirms recommending a half-size-up based on her own experience.

The practical takeaway: if you’ve worn a previous Glycerin model and loved the fit, don’t assume this one matches exactly, sizing up half a size is the safer move based on how often that specific complaint appears. If you’re new to the line, ordering true to size still works for many buyers, but keep an eye on early wear for any toe-box tightness.

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Who Should Buy the Glycerin 23

Neutral runners who prioritize plush cushioning and real arch support, anyone on their feet for long shifts at work who needs a shoe that won’t leave their legs aching by the end of the day, and buyers with flat feet, high arches, or plantar fasciitis who’ve had good experiences with supportive cushioned shoes before.

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Who Should Skip the Glycerin 23

Anyone specifically training for speed work, this is a daily-mileage comfort shoe, not a responsive racing trainer. Also worth pausing if you’ve worn and loved a previous Glycerin model, since the toe box fit has genuinely changed enough to catch several longtime wearers off guard.

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Is the Glycerin 23 Worth the Money?

Based on the sheer volume of specific, detailed positive feedback around comfort and arch support, yes, for the audience this shoe is built for. It’s a premium price point, and a handful of reviewers note that directly, but the durability feedback (many buyers replacing at the 6-12 month mark after heavy daily use, not because the shoe failed early) supports the price holding up over real wear.

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Glycerin 23 Final Verdict

The Brooks Glycerin 23 earns its reputation as one of the brand’s most comfortable everyday trainers, real buyers with foot pain, long work shifts, and high mileage back that up in detail, not just star ratings. The honest caveats are real too: if you’ve worn previous Glycerin models, expect the toe box to fit differently, and know the collar lining debris complaint exists before you commit to it as your daily runner. Get the sizing right, and this is a shoe worth the investment.

👉 Check the latest price on Amazon

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Glycerin 23 Frequently Asked Questions

Does the Glycerin 23 run true to size?
It depends on your history with the line. Buyers coming from previous Glycerin models most often report it running smaller through the toe box and recommend sizing up half a size. First-time buyers report a more even split between true-to-size and slightly small.

Is the Glycerin 23 good for people with plantar fasciitis or flat feet?
Real reviewers with both conditions specifically praise the arch support and describe reduced foot pain during long walks and shifts on their feet.

What’s the actual difference between the Glycerin 23 and the Glycerin 22?
The 23 adds 2mm more nitrogen-infused cushioning in the forefoot and a new triple jacquard warp-knit upper, but this also changed the toe box fit enough that some long-time wearers experienced a noticeably tighter feel.

Is this a good shoe for running, or just walking?
Both, based on real usage. Reviewers use it for road running, treadmill running, walking, gym training, and full work shifts on their feet. It’s built as a daily-mileage comfort shoe rather than a speed-focused racing trainer.

What if the Glycerin 23 doesn’t fit right after I buy it?
Brooks offers a 90-day Run Happy Promise return policy, and their support team actively responds to sizing complaints on this listing directly, pointing buyers toward that return option.

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