The first time I flipped a package of baby wipes over to read the back, my daughter Emme was four days old, and I was sitting on the floor of her nursery at 2 a.m. She'd just had her first real blowout. There were three different wipe brands stacked next to me, all gifts from the baby shower, and somewhere in the haze of newborn exhaustion, I decided this was the moment to figure out which one I actually trusted on her skin.

I'm a physician. I have spent two decades reading ingredient lists, drug inserts, and clinical trial data. And I sat there on that nursery floor, squinting at a wipe package, completely overwhelmed.

If you have ever stood in the baby aisle holding two packages of wipes and thought, I have no idea how to choose between these, I want you to know: I have been there in a literal way, in my pajamas, at 2 a.m. That experience is part of why I'm writing this article today.

Recently, we updated our wipes formula at Parasol to meet the requirements for EWG Verified® certification, a leading benchmark for ingredient safety and transparency in personal care. I was involved in that reformulation from the inside, working with our science and product teams on the choices that went into this version. I want to walk you through what changed, why it changed, and what I want every parent to understand about how thoughtful formulation actually works, as a physician who helped build this, and as the mom on the nursery floor who has stood exactly where you might be standing.

This article covers:

• Why formulation updates are necessary in the first place

• How water-based products like wipes are stabilized safely

• The role and safety profile of specific supporting ingredients, including one I know parents ask about

Why Formulas Evolve

Here's something I wish more brands said out loud: formulation is not static.

Safety frameworks change. Ingredient screening standards get more rigorous. Manufacturing capabilities improve. Independent science evolves. A formula that was excellent in 2020 may have room to be better in 2026, not because anything was wrong before, but because we know more, and we have more tools, and the bar keeps rising. Responsible brands update their products accordingly.

I'll be honest with you: I think a brand that never changes its formula is a brand that has stopped paying attention.

This update reflects three things:

• Alignment with more stringent ingredient screening standards (EWG Verified®)

• Advances in preservation systems for water-based products

• Improvements in raw material quality, including the water itself

The goal isn't to change for the sake of change. It's optimizing for safety, consistency, and long-term product integrity, which, in practice, means a wipe you can trust on day one and day 180 of the package being open.

Water-Based Products and Microbiological Safety

Our wipes are approximately 99% water. That number is something the industry tends to celebrate, and it should be celebrated, but I want to tell you the part that doesn't make the marketing copy: a high-water formula is also a highly sensitive microbiological environment.

Think about what a wipe package actually goes through in real life. Every time you open it, air gets in. Hands touch the top wipe. The package gets thrown in a diaper bag, brought to a park, left in a hot car, or stuffed under a stroller. Repeated opening, repeated closing, weeks of use. That's not a controlled environment. That's a real one.

Any aqueous product exposed to that kind of use can become susceptible to contamination over time. Without an effective preservation system, the risks are:

• Bacterial proliferation

• Yeast and mold growth

These aren't theoretical concerns. They're well-established risks in cosmetic science, and they're the kinds of problems that, when they happen, are much worse for a baby's skin than any of the trace-level ingredients people worry about on the label.

This is the part I want every parent to internalize: a wipe without preservation isn't a "cleaner" wipe. It's an unsafe wipe. All water-based personal care products require some kind of preservation system. The question is never whether to have one. The question is which one, at what concentration, with what supporting ingredients, and whether the brand can defend every choice they made.

A good preservation system does three things:

• Maintains microbiological safety

• Preserves product integrity

• Ensures consistent performance from first use to last
  

What Actually Changed in Our Formula

The update came down to three improvements.

1. A Refined Preservation System

The preservation system was updated to meet EWG Verified® requirements while maintaining effective protection against microbial growth. Different preservatives have different strengths, weaknesses, and skin compatibility profiles, and the goal here was a system that hits a higher bar on both ingredient screening and real-world protection.

2. Supporting Functional Ingredients

A small number of ingredients are included at low concentrations to support the system as a whole. Their job is to:

• Improve stability

• Support preservation efficacy

• Maintain consistent product performance

I'll get into one of these in detail below, because it's the one parents most often ask about.

3. A Transition to EDI Water

This one is genuinely exciting if you're a formulation nerd (which, after enough years of practice, I am). We now use electrodeionized (EDI) water, an advanced purification method that removes dissolved ions beyond what traditional reverse osmosis achieves.

In practical terms, that means:

• Higher water purity

• Greater consistency batch to batch

• Improved overall formulation quality

When 99% of your product is water, the quality of that water is the foundation of everything else. EDI is a meaningful step up.

Understanding Supporting Ingredients, and the One Parent's Ask About Most

In modern cosmetic formulations, supporting ingredients play an important role in maintaining safety and stability, especially in high-water systems like ours. They're used at low concentrations, selected based on function and safety profile, and evaluated through independent scientific review.

One ingredient that consistently generates questions is tetrasodium EDTA, and I want to spend some real time on it, because I was part of the team that made the decision to include it, and I want you to understand exactly why.

Here's the context. I know EDTA from a completely different place in medicine than where it shows up in personal care. Clinically, we use EDTA intravenously as a chelating therapy for heavy metal poisoning, lead, mercury, that kind of thing. It grabs metal ions and pulls them out of the bloodstream. It's a serious drug for serious situations.

That's the association most parents who Google this ingredient end up with, and I understand why it raises a question. So when we sat down to design the preservation system for this updated formula, the conversation about whether to include tetrasodium EDTA wasn't a casual one. We worked through the science, the published safety data, the alternatives, and what each choice would mean for the wipe as a whole system. I want to walk you through the same thinking we did, in the same order we did it.

What EDTA is doing in this formula

In a wipe, tetrasodium EDTA isn't pulling metals out of your baby. It's a chelating agent in the formula itself. It binds trace metal ions, calcium, magnesium, and iron that come in through the water or get introduced during use. Those trace metals matter because they can:

• Reduce preservative effectiveness

• Contribute to product instability

• Accelerate degradation

By binding them, EDTA protects the preservation system. It's part of why the wipe is still safe to use months after the package has been opened. The function it serves is genuinely protective, and when we evaluated the alternatives during reformulation, removing it without an equivalent replacement would have weakened the whole system. That's the system-level point I'll come back to at the end.

Dermal absorption, the question we examined most closely

This was the question I pressed on hardest during development, because it's the one that matters most for a product that's used six to ten times a day on a baby.

Available data indicate that dermal absorption of EDTA salts is minimal. The Cosmetic Ingredient Review (CIR) Expert Panel, the independent body that evaluates the safety of cosmetic ingredients in the U.S., has specifically addressed this. Dermal exposure results in very little EDTA penetrating the skin, with systemic levels well below those associated with any adverse effects. This is particularly relevant for products applied to intact skin, which is what we're talking about with wipes used as directed.

Safety assessment

Tetrasodium EDTA and related compounds have been extensively evaluated by independent scientific bodies. The CIR Expert Panel has reviewed EDTA and its salts multiple times, most recently reaffirming in 2019, and concluded that EDTA and its salts are safe as used in cosmetic formulations.

Additional findings:

• No evidence of genotoxicity across multiple in vitro studies

• Low systemic toxicity at cosmetic exposure levels

• Minimal dermal penetration under typical conditions of use

Use levels, context matters

Published data on EDTA use in cosmetic formulations:

• Up to 1.9% in rinse-off products and around 0.5% in leave-on products

• Reported use in baby products specifically: around 0.19–0.2%

In our wipes, tetrasodium EDTA is used at approximately 0.05% by weight, below typical reported use in baby products, and well within established safety margins.

A note on manufacturing

You may have seen claims that EDTA is "made from formaldehyde" or other concerning substances. This comes up enough that I want to address it directly, because it's the kind of thing that sounds alarming and is actually a misunderstanding of how chemistry works.

Many ingredient synthesis pathways, pharmaceutical, cosmetic, and food-grade, involve intermediate substances that wouldn't be safe in their raw form. What matters is the final ingredient, after purification and quality control. The starting materials are not present in the finished material. This is standard across pharmaceutical and cosmetic manufacturing, and it's the same principle that governs the medications most of us take without thinking twice.

EWG and ingredient safety standards

The Environmental Working Group (EWG) evaluates ingredients across multiple health endpoints. EDTA and its salts are classified as low risk across categories, including:

• Cancer

• Developmental and reproductive toxicity

• Allergies and immunotoxicity

EWG Verified® certification, which our updated formula meets, requires full ingredient transparency, exclusion of ingredients on EWG's restricted lists, and compliance with strict safety criteria. We engaged with that standard fully, documenting what's in our formula, why it's there, and at what concentration.

Balancing Safety and Performance: A Clinical Perspective

I want to leave you with the way I think about all of this as a physician, because it's the lens I use, whether I'm reading a medication label or a wipe ingredient list.

Formulating for sensitive skin requires balancing multiple factors at once:

• Microbiological safety, preventing contamination

• Dermal compatibility, minimizing irritation potential

• Stability over time, ensuring consistent performance from first use to last

Here is the thing I most want parents to take from this article: removing a stabilizing or supporting ingredient without an appropriate alternative can increase risk, not reduce it.

It is tempting, and totally understandable, to look at an ingredient list and want it shorter. To want every single thing on it to be a word you recognize from your kitchen. I get it. I am that parent, too. But formulation doesn't actually work that way. Every ingredient in a wipe is doing a job. Take one out, and either you replace it with something else doing the same job, or you weaken the system. There is no formulation that is purely "ingredients I've heard of" and safely shelf-stable in a high-water product that touches your baby's skin hundreds of times.

The work of being a thoughtful parent isn't finding the mythical wipe with no ingredients. It's understanding what each ingredient is doing and whether the risk-to-benefit math actually works. The updated formulation reflects a system-level approach to safety, evaluating choices in context, not in isolation.

Summary

• Formulations evolve to meet higher standards of safety and performance

• Water-based products require preservation systems to remain safe

• Supporting ingredients are used at low levels to maintain stability and efficacy

• Tetrasodium EDTA is a well-studied ingredient with minimal dermal absorption and established safety at cosmetic use levels

• The concentration used in our wipes (~0.05%) is well within accepted safety ranges

Our Ongoing Commitment

We approach formulation through a clinical, evidence-based lens, continuously evaluating new data, standards, and technologies to improve our products. That isn't a marketing promise. It's just how the work gets done when you care about it.

Our goal remains unchanged: to deliver products that are safe, effective, and appropriate for the most sensitive skin.

And if you are reading this on the nursery floor at 2 a.m., trying to decide which wipe to trust: I see you. Emme is older now, and I promise, this part gets easier.

Suggested citations

1. Cosmetic Ingredient Review Expert Panel. Safety Assessment of EDTA and Salts as Used in Cosmetics (2019 re-review of 2002 final report). Available at cir-safety.org.

2. CIR concentration-of-use data from the 2019 EDTA re-review, summarizing reported use in baby products. [Confirm specific concentration ranges before publishing]

3. Environmental Working Group. EWG Verified™ Criteria. See ewg.org/skindeep for the full standard.

4. International Journal of Toxicology. Final Report on the Safety Assessment of EDTA, Calcium Disodium EDTA, Diammonium EDTA, Dipotassium EDTA, Disodium EDTA, TEA-EDTA, Tetrasodium EDTA, Tripotassium EDTA, Trisodium EDTA, HEDTA, and Trisodium HEDTA. 2002;21:95-142.