Key Takeaways
Odor from incontinence products is primarily driven by hydrogen sulfide and other sulfur compounds, along with volatile fatty acids and aldehydes produced when bacteria interact with urine, not by ammonia, which research shows stays below the level the human nose can detect.
How quickly a pad absorbs and locks away moisture matters, because reducing skin and bacterial contact time may help reduce the conditions that lead to odor.
Synthetic fragrances mask odor rather than address its source, and they can introduce added chemicals to skin that's already vulnerable to irritation.
Attn: Grace pads use a plant-based top sheet made from upcycled sugarcane, are chlorine-free, and are formulated without synthetic fragrances or dyes, supporting a more natural approach to odor management.
A full routine, including breathable pads, gentle cleansing wipes, and a protective barrier cream, supports skin health and may help with odor management over the course of a day.
What Actually Causes Odor (It's Not What You Think)
For years, ammonia got the blame for the smell associated with incontinence products. It's an easy assumption, since ammonia has a sharp, unmistakable odor most people associate with urine. But the research doesn't support it. A study published in the journal Sensors measured volatile compounds released from urine and used pads and found that ammonia levels were consistently below the threshold at which the human nose can detect them. Ammonia production from bacterial activity is a delayed process, so under normal use conditions, it simply doesn't reach a detectable concentration.
So what's actually responsible for odor? The same study identified hydrogen sulfide and methanethiol, both sulfur compounds, as major contributors, along with aldehydes like acetaldehyde and butyraldehyde. A separate analysis published in the Journal of Wound, Ostomy and Continence Nursing identified 26 distinct volatile odorants in used absorbent products, with sulfur compounds standing out as particularly strong contributors to the smell people notice. Research on microbiota and body odor confirms that volatile fatty acids, produced when bacteria break down organic compounds in bodily fluids, are consistently associated with malodor across the body, including in urine.
In plain terms, odor isn't caused by urine itself. It's caused by a chemical reaction between bacteria and the compounds in urine over time. That distinction matters, because it means the real opportunity for natural odor control incontinence products lies in limiting that reaction, not just covering up its result.
How Moisture Contact Time Drives Odor
The longer moisture sits against skin, or the longer it sits in a pad before being absorbed and locked away, the more time bacteria have to interact with it and produce odor-causing compounds. This is why absorption speed is one of the most underrated features in an incontinence pad.
A study on incontinence pad use found that skin moisture levels rose dramatically within just 15 minutes of exposure to a wet pad, even a premium pad with wicking technology, and that cutaneous pH and water loss through the skin barrier continued to climb over several hours of wear. Skin changes associated with prolonged moisture exposure can begin rapidly, which is part of why prompt changing matters for comfort. If skin irritation, redness, or breakdown persists or worsens despite prompt changing and gentle care, it's a good idea to consult a healthcare provider or continence specialist, since ongoing skin changes can have causes beyond product choice. The same principle that affects skin health also affects odor: less time in contact with moisture generally means less time for bacterial activity, and less opportunity for sulfur compounds and volatile fatty acids to form.
This is one of the reasons pad design, not just fragrance, is central to how to prevent odor from incontinence pads. A pad that pulls moisture away from the skin surface quickly and holds it deep within its core is addressing the root mechanism, not the aftermath.
Why Synthetic Fragrances Mask Rather Than Solve
It's a reasonable assumption that a "fresh scent" pad handles odor better. In reality, fragrance works by adding a stronger, more dominant scent on top of existing odor compounds. It doesn't change the underlying chemistry. The hydrogen sulfide and volatile fatty acids are still there, just layered under something else.
There's also a tradeoff worth knowing about. Synthetic fragrances are a common source of skin sensitivity and irritation, particularly on skin already dealing with extended moisture exposure. For anyone managing incontinence, that skin is already working harder than usual with the friction and pH changes. Adding a fragrance compound to that environment may increase the likelihood of irritation without addressing why the odor happened in the first place. This is a core reason many women actively search for fragrance-free incontinence pads. They want a product that respects sensitive skin rather than adding another variable to it.
What Plant-Based Construction Does Differently
Attn: Grace pads take a different approach, starting with materials rather than masking agents. The top sheet is made from upcycled sugarcane, a plant-based material rather than a petroleum-derived synthetic. The pulp used in the absorbent core is FSC-certified and processed without chlorine, avoiding a manufacturing step linked to byproducts that can affect both skin and the environment. The products are also formulated without synthetic fragrances or dyes and are free from more than 1,700 chemicals referenced in EU personal care regulations which is a voluntary standard, as absorbent hygiene products are not legally required to meet EU cosmetics regulations, but one the brand applies as a benchmark.
None of this claims to eliminate odor entirely, because that isn't realistic for any absorbent product managing bodily fluids. What it does is remove an added irritant (synthetic fragrance) and support faster, more effective absorption, which, based on the mechanisms described above, may help minimize the conditions that lead to noticeable odor. Attn: Grace pads are also OEKO-TEX Standard 100 certified, supporting independent testing of the materials for harmful substances, and the line has received a Dermatest Excellent rating.
How Wipes and Barrier Cream Support the Routine
Odor management isn't just about the pad; it's about the full routine around it. Organic Flushable Wipes offer a way to gently cleanse skin during changes, which helps remove residue that could otherwise sit against skin between changes. Attn: Grace's All Natural Barrier Cream is designed to create a protective layer between skin and moisture, which may help reduce direct skin contact time with fluid, similarly to how faster pad absorption reduces contact time within the product itself.
Together, a breathable plant-based pad, a gentle wipe, and a barrier cream form a more complete approach to daily comfort than any single product can offer alone. This layered routine reflects what continence specialists generally recommend, addressing moisture control from multiple angles rather than relying on scent to solve a chemistry problem.
Why This Matters
Incontinence is far more common than most conversations suggest. An estimated 80 million women in the U.S. experience some form of it, and roughly half of all women will deal with it at some point in their lives (NAFC). Many women wait years before addressing it openly, partly because of stigma tied to odor concerns. Understanding that odor comes from a manageable chemical process, not something inherent or embarrassing, can make it easier to choose products with confidence. Anyone experiencing new, worsening, or persistent incontinence symptoms, unusual odor changes, or skin irritation that doesn't resolve with routine care should speak with a healthcare provider or continence specialist to rule out an underlying cause.
Frequently Asked Questions
Why do incontinence pads smell?
Odor develops when bacteria interact with compounds in urine over time, producing hydrogen sulfide, volatile fatty acids, and other sulfur-containing compounds. Research shows ammonia, long assumed to be the main culprit, actually stays below the level the human nose can detect in most conditions.
Does fragrance actually help with odor?
Fragrance can mask odor temporarily by introducing a stronger competing scent, but it doesn't change the underlying chemical process producing the odor. It can also introduce an added irritant to skin that's already coping with extended moisture exposure.
Are plant-based pads better than scented ones for odor management?
Plant-based pads like Attn: Grace focus on fast absorption and moisture lock-away, which may help reduce the contact time that allows odor-causing bacterial activity to occur, rather than covering the smell with fragrance. This supports both odor management and skin comfort without adding synthetic fragrance chemicals.
How can I manage odor daily beyond the pad itself?
A full routine helps: change pads promptly, use a gentle cleansing wipe during changes, and apply a barrier cream to reduce direct skin contact with moisture. Choosing fragrance-free, breathable materials from the start supports this routine rather than working against it. If odor changes suddenly or is accompanied by pain, fever, or other new symptoms, check with a healthcare provider, since this can indicate a condition unrelated to product choice.
Are fragrance-free incontinence pads as effective as scented ones?
Effectiveness for odor management depends primarily on absorption speed and moisture lock-away, not fragrance. A well-designed fragrance-free pad can support odor management as well as, or better than, a scented one, without the added irritation risk that synthetic fragrance can carry.
Disclaimer: This content is for educational and informational purposes only. It is not medical advice and should not replace consultation with a qualified health professional. While we strive for accuracy, we make no warranties about completeness or suitability for any purpose. If you have health concerns or persistent symptoms, please consult your clinician.