Posts Tagged ‘lab-tested silicone’

Platinum Silicone Sex Toys vs Medical-Grade Silicone: Complete Safety Guide 2025

When you’re shopping for platinum silicone sex toys, it’s easy to feel overwhelmed by confusing terms like “medical-grade” and “platinum-cured.” Which one is actually safer for your body? How can you tell if platinum silicone sex toys are genuinely high-quality or just marketing hype?

Here’s the truth: not all silicone is created equal. Understanding the difference between platinum silicone and medical-grade silicone could be the key to protecting your health and investing in body-safe pleasure products that last.

In this guide, you’ll discover what makes platinum silicone toys superior, how they’re tested, what certifications matter, and how to spot fake products before you buy.

What Is Platinum Silicone and Why Does It Matter?

Platinum silicone is a high-purity, non-porous material cured using a platinum catalyst during manufacturing. This curing process leaves zero residual chemicals behind, making it one of the safest materials for intimate use.

Unlike cheaper alternatives that use peroxide or tin catalysts, platinum-cured silicone creates a cleaner final product. The platinum catalyst triggers a chemical reaction that bonds silicone polymers without leaving toxic byproducts or irritants.

This matters for your health because residual chemicals can leach into your body over time, causing irritation, allergic reactions, or hormonal disruption.

Medical-Grade Silicone: What Does It Really Mean?

Medical-grade silicone refers to materials tested for biocompatibility and approved for use in medical devices like catheters, implants, and surgical tools. It’s manufactured in controlled environments to meet strict purity standards.

However, here’s the catch: “medical-grade” doesn’t automatically tell you how the silicone was cured. Some medical-grade products still use peroxide curing, which can leave residual chemicals that platinum curing avoids.

The term “medical-grade” describes where the silicone can be used, while “platinum-cured” describes how pure and safe the final material is.

The Critical Difference Between Platinum and Medical-Grade Silicone

Platinum-cured silicone is often used within medical-grade products, but not all medical-grade toys are platinum-cured. The key distinction lies in the curing method and resulting purity.

Platinum curing uses a platinum catalyst that creates an addition cure reaction. This produces a more stable material with superior heat resistance, zero odor, and better color stability than peroxide-cured alternatives.

Medical-grade silicone can use various curing methods, including peroxide. While still safe for many applications, peroxide-cured silicone tends to be slightly more porous, may yellow over time, and can have a subtle chemical smell.

A comprehensive review published in Wiley Online Library confirms that silicone-based biomaterials demonstrate exceptional biocompatibility and bio-durability when interacting with host tissues, making them ideal for medical implants and intimate applications (https://onlinelibrary.wiley.com/doi/full/10.1002/app.50969).

Peroxide-Cured vs Platinum-Cured: The Science Explained

Understanding the curing process helps you make smarter decisions when shopping for platinum silicone sex toys. Here’s how each method works:

Peroxide-Cured Silicone:

  • Uses organic peroxide as the catalyst
  • Requires heat to activate curing
  • Leaves small amounts of organic acids behind
  • More affordable to manufacture
  • Can produce slight odor
  • May become cloudy or yellow with age

Platinum-Cured Silicone:

  • Uses platinum as the catalyst
  • Creates an addition cure reaction
  • Produces virtually zero byproducts
  • Higher manufacturing cost
  • Completely odorless
  • Maintains clarity and color permanently

According to Specialty Silicone Products, platinum-cured materials meet FDA 21 CFR 177.2600 requirements due to their low levels of extractables, which are potentially harmful substances that could leach from inferior materials (https://sspinc.com/fda-silicone/).

Safety Certifications That Prove Quality

Safety certifications for platinum-cured silicone sex toys, EPI-200-SIT, USP VI approved by Erotixxx Toys
Certified pure and body-safe: platinum silicone tested, verified, and trusted.

Premium platinum silicone sex toys should meet or exceed these industry standards:

USP Class VI Certification: This is the gold standard for biocompatibility testing. It checks for cytotoxicity (cell damage), sensitization (allergic reactions), and irritation potential through rigorous laboratory testing.

ISO 10993 Testing: An international standard that evaluates how materials interact with human tissue. It confirms the material won’t trigger inflammation, immune responses, or cellular damage.

FDA CFR 177.2600 Compliance: This FDA regulation applies to rubber articles intended for repeated use in contact with food or the human body. Platinum-cured silicone meets these strict requirements.

EPI-200-SIT Protocol: This specialized test evaluates materials for delayed dermal contact sensitization and skin irritation potential. It’s one of the most comprehensive safety validations available for platinum silicone toys.

Research from the National Institutes of Health demonstrates that silicone gel implants show acceptable biocompatibility levels with minimal inflammatory response, confirming the material’s safety for prolonged tissue contact (https://pmc.ncbi.nlm.nih.gov/articles/PMC3766542/).

Is Medical-Grade Silicone Sex Toy Safe? Answering Your Top Concern

Yes, medical-grade silicone sex toys are generally safe when they come from reputable manufacturers. However, the term “medical-grade” alone doesn’t guarantee the highest safety standards.

Not all companies that claim “medical-grade” status actually test their products. Some manufacturers use the term as marketing jargon without proper certification. Always look for specific safety certifications like USP Class VI, not just vague “medical-grade” claims.

The safest option is platinum-cured, medical-grade silicone that’s been tested under protocols like EPI-200-SIT. This combination ensures both manufacturing cleanliness and material purity.

If you have sensitive skin, allergies, or chemical sensitivities, platinum-cured options are your best choice because they eliminate residual curing agents that can trigger reactions.

7 Key Advantages of Platinum-Cured Silicone Sex Toys

Choosing platinum silicone toys gives you tangible benefits beyond just “safety.” Here’s what makes this material worth the investment:

1. Zero Chemical Migration: Platinum curing leaves no residual catalysts or byproducts that can leach into your body. Your intimate health stays protected even with frequent use.

2. Hypoallergenic Properties: The absence of peroxide, tin, or other reactive agents means platinum silicone is less likely to cause allergic reactions, rashes, or irritation.

3. Superior Heat Resistance: Platinum-cured silicone withstands temperatures up to 600°F. This means you can safely boil your toys for sterilization or experiment with temperature play.

4. Permanent Color Stability: While cheaper silicones may fade or yellow, platinum-cured materials maintain their original appearance for years.

5. Completely Non-Porous: The tight molecular structure prevents bacteria, fungi, and viruses from penetrating the surface. This makes platinum silicone the most hygienic option available.

6. Odor-Free Guarantee: No chemical smell, no silicone odor, just a clean, neutral material that won’t interfere with your experience.

7. Lifetime Durability: When cared for properly, platinum-cured silicone sex toys can last 10+ years without degrading, cracking, or losing their texture.

How to Identify Fake Platinum Silicone (Protect Yourself from Scams)

Unfortunately, many companies falsely label their products as “100% silicone” or “platinum-cured” when they’re actually made from TPE, TPR, or silicone blends.

Here’s how to spot real platinum silicone before you buy:

Red Flag #1: Suspiciously Low Prices: Large, detailed platinum-cured silicone dildo products require significant material costs and skilled labor. If the price seems too good to be true, it probably is. Genuine platinum silicone toys typically start around $60-$80 for small sizes.

Red Flag #2: Strong Chemical Smell: Real platinum silicone is odorless. If your toy has a distinct smell (sweet, chemical, or plastic-like), it’s not pure platinum silicone.

Red Flag #3: Tacky or Sticky Texture: Platinum-cured silicone should feel smooth and slightly velvety, never sticky or greasy.

The Flame Test (Use With Caution): If you’re willing to damage a small area, you can perform a flame test. Hold a lighter to a discreet spot for 5 seconds. Real silicone will leave gray ash without melting. PVC and TPR will melt or produce black soot. Note: This test will leave permanent damage.

Look for Transparency: Reputable brands openly share their certifications, manufacturing locations, and testing protocols. Vague language like “body-safe” without specific certifications is a warning sign.

What Materials Should You Avoid? The Toxic Truth

This image spotlights Erotixxx Toys’ platinum silicone certifications—EPI-200-SIT, USP Class VI, ISO 10993, and FDA CFR 177.2600—giving total confidence in purity, skin-safety, and superior U.S. manufacturing from the platinum-cured leaders.
Learn which materials put your health at risk and why platinum-cured silicone is safest.

Understanding what NOT to buy is just as important as knowing safe materials. These common sex toy materials pose serious health risks:

PVC (Polyvinyl Chloride): Often contains phthalates, which are hormone-disrupting chemicals linked to reproductive health issues. PVC toys are porous, harbor bacteria, and can’t be sterilized.

Jelly Rubber: This generic category includes various plasticized materials that often contain toxic chemicals. Jelly toys frequently have strong chemical odors and degrade quickly.

TPE/TPR (Thermoplastic Elastomer/Rubber): While marketed as “body-safe,” these materials are porous and can contain unlisted additives. They require condom use and frequent replacement.

A comprehensive study published by the National Institutes of Health found that phthalates commonly used in cheaper sex toys can cause skin irritation, mucous membrane damage, and have been linked to reproductive health concerns, diabetes, obesity, and cardiovascular disease (https://pmc.ncbi.nlm.nih.gov/articles/PMC8157593/).

The FDA doesn’t regulate adult toys the way it does medical devices, so manufacturers can use nearly any material without safety testing. This makes your own research critical when selecting platinum silicone sex toys.

Cleaning and Maintenance: How to Care for Platinum Silicone

Proper care extends the life of your platinum silicone toys and keeps them hygienically safe. Follow these guidelines:

Boiling Method: Submerge your toy in boiling water for 3-5 minutes to kill 99.9% of microbes. This is the most effective sterilization method. Only boil 100% silicone toys without electronic components.

Soap and Water: Wash with unscented antibacterial soap and warm water after each use. Pay special attention to textured areas where residue can collect.

Dishwasher Safe: You can place non-motorized platinum silicone toys on the top rack of your dishwasher. Run a hot water cycle without detergent for thorough sanitization.

Storage Tips: Store your platinum silicone toys separately in individual fabric bags or cases. While platinum silicone is highly stable, some silicone-to-silicone contact can cause surface bonding over time.

Lubricant Compatibility: Use only water-based or hybrid lubricants with platinum silicone toys. Silicone-based lubricants can degrade the surface and create permanent sticky patches.

Why Erotixxx Toys Stands Out in the Premium Platinum Silicone Market

Not all platinum silicone brands are created equal. Here’s what makes Erotixxx Toys different when you’re shopping for platinum silicone sex toys:

Hand-Poured Artisan Craftsmanship: Every toy is individually hand-poured in small batches in the USA. This artisan approach ensures attention to detail in every curve and texture while supporting American manufacturing and skilled craftsmanship.

EPI-200-SIT Protocol Certification: Erotixxx’s platinum-cured silicone is tested and certified under the rigorous EPI-200-SIT protocol, which verifies zero harmful additives or fillers, hypoallergenic and non-irritating properties, and safety for long-term, repeated intimate use.

Exceeds All Major Safety Standards: Every product meets or exceeds USP Class VI biocompatibility certification, ISO 10993 safety testing, and FDA CFR 177.2600 compliance standards.

Made in USA Quality Assurance: Manufacturing in the United States ensures consistent quality control, ethical labor practices, and compliance with domestic safety regulations.

Custom Firmness Options: Erotixxx offers multiple Shore hardness levels so you can choose the perfect firmness for your comfort and pleasure preferences.

Fantasy Designs with Medical-Grade Safety: You don’t have to sacrifice creativity for safety. Erotixxx specializes in unique fantasy designs that blend artistic expression with certified body-safe materials.

100% Discreet Packaging: Your privacy matters. All orders ship in plain, unmarked packaging with no indication of contents. Credit card statements show a discreet business name.

Browse our platinum-cured silicone collection: https://erotixxxtoys.com/shop/

Platinum Silicone vs Competitors: The Honest Comparison

Here’s how premium platinum-cured silicone from Erotixxx compares to other common options on the market:

FeatureErotixxx Platinum SiliconeStandard “Silicone” ToysTPE/TPR ToysPVC/Jelly Toys
Curing MethodPlatinum catalystOften peroxide or unknownN/A (thermoplastic)N/A (plasticized)
Purity LevelMedical-grade, zero residueVaries; may contain fillersPorous; unknown additivesContains phthalates
Safety CertificationsUSP VI, ISO 10993, EPI-200-SITRarely certifiedNoneNone
Porosity100% non-porousNon-porous (if pure)PorousHighly porous
SterilizationBoilable up to 600°FSome grades boilableCannot boilCannot boil
OdorZero odorMay have slight smellOften chemical smellStrong chemical odor
Lifespan10+ years3-7 years1-3 years6-12 months
Allergy RiskHypoallergenicLow (if pure)ModerateHigh
Color StabilityPermanentMay fadeFades quicklyYellows/degrades
Made InUSAOften ChinaChinaChina
Price Range$$$$$ – $$$$ – $$$

The higher upfront cost of certified platinum silicone sex toys pays for itself through safety, longevity, and peace of mind.

The Cost Question: Why Platinum Silicone Costs More (And Why It’s Worth It)

The cost and value of platinum-cured silicone sex toys, long-term safety investment by Erotixxx Toys
Invest in platinum silicone—lasting safety, certified quality, and real value.

Let’s address the elephant in the room: premium platinum silicone toys cost more than budget alternatives. Here’s the honest breakdown:

Raw Material Costs: Platinum catalyst is significantly more expensive than peroxide. The pure silicone polymers required for medical-grade products also cost more than industrial-grade silicones.

Manufacturing Complexity: Platinum curing requires precise temperature control, longer curing times, and specialized equipment. Manufacturers can’t cut corners without compromising quality.

Testing and Certification: USP Class VI, ISO 10993, and EPI-200-SIT testing cost thousands of dollars per material batch. Reputable brands invest in these certifications; questionable brands skip them.

Long-Term Value: A $100 platinum-cured silicone dildo that lasts 10 years costs $10 per year. A $30 TPE toy that lasts 1 year costs $30 annually. The platinum option saves money over time while protecting your health.

Frequently Asked Questions About Platinum Silicone Sex Toys

Can a toy be both platinum-cured and medical-grade?

Yes, absolutely. Most high-quality platinum-cured silicones are manufactured in medical-grade facilities and meet medical-grade standards. Erotixxx Toys uses platinum-cured silicone that qualifies as medical-grade through its USP Class VI certification and EPI-200-SIT testing.

Is medical-grade silicone always non-toxic?

Generally yes, but “medical-grade” alone doesn’t guarantee the purest material. Some companies use the term loosely without proper certifications. Look for specific safety testing like USP Class VI. Platinum-cured options offer an extra layer of purity beyond standard medical-grade designations.

What is EPI-200-SIT testing and why does it matter?

EPI-200-SIT is a comprehensive dermal irritation test developed by MatTek Corporation. It evaluates whether a material causes skin irritation or delayed allergic sensitization using reconstructed human tissue. Products that pass this test are verified safe for prolonged, repeated skin contact. Erotixxx Toys’ certification under this protocol demonstrates a commitment to safety beyond industry minimums.

How can I tell if my toy is real platinum silicone?

Check for certifications first. Reputable brands will clearly state their safety testing. Real platinum silicone is completely odorless, never sticky, and should come from a company transparent about manufacturing. If you’re skeptical of an existing toy, the flame test can help, but it will damage the toy.

Can I use silicone lube with platinum silicone toys?

No, silicone-based lubricants can bond with or degrade silicone toy surfaces. Always use water-based or hybrid lubricants with all silicone toys, including platinum-cured varieties. This preserves the smooth texture and prevents sticky patches from forming.

Is platinum-cured silicone safe for people with allergies or sensitive skin?

Yes, it’s the safest option for sensitive individuals. Platinum curing eliminates residual chemicals that commonly trigger allergic reactions. The material is hypoallergenic, non-irritating, and recommended by medical professionals for people with chemical sensitivities or skin conditions.

How long do platinum silicone toys actually last?

With proper care (regular cleaning, appropriate storage, water-based lube only), platinum-cured silicone toys can last 10 years or more without degrading. The material doesn’t break down, crack, or lose its texture over time. This longevity makes premium platinum options the most cost-effective choice long-term.

What’s the difference between peroxide-cured and platinum-cured silicone for sex toys?

Peroxide-cured silicone uses organic peroxide as a catalyst, which can leave trace amounts of organic acids. It may have a slight odor, can yellow over time, and tends to be slightly more porous. Platinum-cured silicone uses a platinum catalyst that produces virtually zero byproducts, resulting in superior purity, permanent clarity, complete odor absence, and better heat resistance.

Can I boil my platinum silicone toy to sterilize it?

Yes, boiling is one of the best ways to sterilize platinum-cured silicone. The material safely withstands temperatures up to 600°F without degrading. Submerge your toy in boiling water for 3-5 minutes to kill bacteria, viruses, and fungi. Only boil 100% silicone toys without electronic components.

Are there any disadvantages to platinum silicone?

The primary drawback is cost. Platinum-cured silicone sex toys are more expensive than budget alternatives due to material costs and manufacturing complexity. They also require water-based lubricants only. However, these minor inconveniences are vastly outweighed by the safety, durability, and hygiene benefits.

Is platinum silicone eco-friendly?

Platinum-cured silicone is relatively environmentally friendly compared to disposable alternatives. The material is inert and non-toxic, doesn’t leach chemicals, and its decade-plus lifespan reduces waste. While silicone isn’t biodegradable, a single platinum toy that lasts 10 years has far less environmental impact than replacing cheaper toys annually.

Where should I store platinum silicone toys?

Store your platinum silicone toys in individual fabric pouches or cases in a cool, dry place. Keep them separate from other silicone toys to prevent potential surface bonding. Avoid direct sunlight or extreme temperatures.

Make the Safe Choice: Invest in Your Health and Pleasure

Your intimate wellness deserves the same quality standards you’d expect from any product that touches your body. Platinum silicone sex toys offer unmatched safety, purity, and longevity that budget alternatives simply cannot match.

While the upfront cost may be higher, you’re investing in a body-safe product that protects your health, provides reliable pleasure, and lasts for years. The peace of mind that comes with certified, tested, hypoallergenic materials is priceless.

Your Next Step: Explore Erotixxx’s Certified Collection

Ready to experience the difference that genuine platinum-cured silicone makes? Erotixxx Toys offers a complete range of fantasy designs crafted from EPI-200-SIT certified, medical-grade platinum silicone.

Every toy is hand-poured in the USA, individually quality-checked, and backed by transparent safety certifications. Choose your perfect size, color, and firmness level with confidence.

Shop the full platinum silicone collection: https://erotixxxtoys.com/shop/

Learn more about body-safe materials: https://erotixxxtoys.com/blog/body-safe-dildo-materials/

Discover how we test our silicone: https://erotixxxtoys.com/blog/is-platinum-cured-silicone-safe-for-sex-toys/

Find your ideal firmness level: https://erotixxxtoys.com/blog/sex-toy-firmness-guide/

Your body deserves platinum-grade care. Make the smart choice today.

References:

1. Wiley Online Library – Silicone Biomaterials Study: https://onlinelibrary.wiley.com/doi/full/10.1002/app.50969

2. Specialty Silicone Products (SSP) – FDA Compliance Guide: https://sspinc.com/fda-silicone/

3. NIH Study – Silicone Gel Biocompatibility Evaluation: https://pmc.ncbi.nlm.nih.gov/articles/PMC3766542/

4. NIH Study – Phthalates and Health Impacts:  https://pmc.ncbi.nlm.nih.gov/articles/PMC8157593/

Is Platinum-Cured Silicone Safe for Sex Toys? Body-Safe Guide

When buying a new sex toy, the last thing you want to worry about is whether it’s safe for your body. Yet with so many materials and marketing claims out there, it can be confusing to know which products are truly body-safe. This guide will give you clear, science-backed answers about platinum-cured silicone, is platinum-cured silicone safe, and why it’s considered the gold standard for intimate use.

What Is Platinum-Cured Silicone?

Platinum-cured silicone is a type of silicone rubber that uses platinum as a catalyst in its curing process. Unlike peroxide-cured silicone, platinum-cured silicone results in a cleaner, purer final product with fewer byproducts and no residual curing agents. This makes it more stable, hypoallergenic, and non-porous, which is crucial for body-safe sex toys.

Why Does Non-Porous Matter for Sex Toys?

Porous materials can trap bacteria, fluids, and odors inside tiny surface holes. Over time, this can lead to hygiene issues and even infections, as these microorganisms are difficult to remove completely. Platinum-cured silicone is non-porous, meaning its surface does not absorb moisture or harbor bacteria, making it significantly safer for intimate use.

According to Healthline (2023), non-porous materials like platinum-cured silicone are essential for anyone concerned about sexual health because they prevent microbial buildup and are easier to clean thoroughly.

How Is Platinum-Cured Silicone Tested for Safety?

A pair of gloved hands preparing for safety testing next to a title that reads “How Is Platinum-Cured Silicone Tested for Safety?” on a galaxy-textured background.

Manufacturers of premium platinum-cured silicone products often test their materials against stringent standards, including:

  • USP Class VI Certification: Ensures the material is biocompatible and non-toxic.
  • ISO 10993 Testing: Assesses cytotoxicity, irritation, and sensitization potential.
  • FDA CFR 177.2600 Compliance: Verifies safe use in repeated contact with the human body.

These certifications confirm that platinum-cured silicone is safe for prolonged skin contact, has no harmful chemical migration, and does not trigger allergic reactions.

ScienceDirect (2022) confirms that platinum-cured silicones show superior purity and stability compared to peroxide-cured alternatives, making them the preferred choice for medical and intimate applications.

Platinum Silicone vs. Standard Silicone: What’s the Difference?

FeaturePlatinum-Cured SiliconeStandard (Peroxide-Cured) Silicone
CatalystPlatinumPeroxide
PurityHigher, minimal byproductsMore residual chemicals
PorosityNon-porousSlightly porous
DurabilityLonger lifespan, color-stableProne to discoloration
OdorOdorlessMay retain manufacturing smells
Body-Safe RatingMedical and intimate-use approvedOften not body-safe certified

Are TPE and PVC Toys Safe Alternatives?

Thermoplastic Elastomers (TPE) and PVC toys are common in lower-cost products, but they are typically porous and may contain phthalates or other plasticizers. These chemicals can leach out over time, especially when exposed to heat, moisture, or friction. Research published by the NIH highlights the potential health risks associated with these materials, recommending non-porous alternatives like platinum-cured silicone for safer use.

How to Identify Genuine Platinum-Cured Silicone Toys

A hand holding a magnifying glass over a silicone toy with text that reads “How to Identify Genuine Platinum-Cured Silicone Toys” on a cosmic background.

Not every product labeled “silicone” is created equal. Here’s how to ensure you’re getting true platinum-cured quality:

  • Look for Certification Claims: Reputable brands will state certifications like USP Class VI.
  • Check for Price Consistency: Genuine platinum silicone costs more to produce. Be wary of suspiciously cheap options.
  • Vendor Transparency: Artisan makers like Erotixxx Toys openly share material sourcing and testing info.
  • Feel & Smell Test: Platinum silicone should be odorless and have a smooth, non-greasy feel.

Safe Use & Cleaning Tips for Platinum-Cured Silicone Toys

  • Wash with fragrance-free mild soap and warm water after each use.
  • For deep cleaning, boil non-motorized toys for 3 to 5 minutes.
  • Air dry on a lint-free cloth.
  • Store in a clean, dry place, away from other materials that may cause surface reactions.

Erotixxx Toys’ Commitment to Body-Safe Platinum Silicone

At Erotixxx Toys, every product is handcrafted using 100% platinum-cured silicone. Our materials are lab-tested for skin safety, are free from phthalates, latex, and BPA, and are shipped worldwide in discreet, unbranded packaging for your privacy. Whether you’re exploring your first realistic dildo, diving into a fantasy toy, or picking up accessories, you can trust the quality and safety of our artisan products.

Ready for worry-free pleasure?

Discover our lab-tested platinum-silicone collection. Ships discreetly in 2 to 5 days. 👉 Shop Now


FAQ

What is platinum-cured silicone made of?
Platinum-cured silicone is made from a combination of silicone polymers and a platinum catalyst that initiates curing. This process results in a non-porous, hypoallergenic material suitable for intimate use.

Is platinum-cured silicone better than medical-grade silicone?
Both terms refer to high-quality silicone, but “medical-grade” pertains to manufacturing in controlled environments. Platinum-cured silicone focuses on the purity of the curing process. The best sex toys often use platinum-cured, medical-grade silicone.

Can I boil platinum-cured silicone toys?
Yes. Boiling for 3 to 5 minutes is a recommended method to sanitize platinum-cured silicone toys, as it effectively kills bacteria without damaging the material.

Do platinum silicone toys have a smell?
No. Genuine platinum-cured silicone is odorless. If a toy has a strong chemical smell, it is likely made from lower-quality materials or has residual curing agents.

How do I know if a toy is truly platinum-cured?
Look for clear certifications (USP Class VI, ISO 10993) and buy from reputable vendors who disclose their materials and testing processes.