You’re not the only person who has asked the question “Are Mylar bags toxic?” No. Mylar bags are not toxic when they are food grade and used as intended. Properly manufactured Mylar bags use safe inner food contact layers and do not leach harmful chemicals under normal storage conditions.
It’s an ongoing debate regarding food storage, emergency preparedness products, vitamins and supplements, and everyday shopping items. The simple answer to this question is a definitive “No!” Provided Mylar bags are made correctly and used appropriately, they will be safe; However, there is much more to this than just saying they are not toxic. Therefore, we will examine the full explanation in detail.
What Mylar Bags Are Made Of
People typically call biaxially oriented polyethylene terephthalate (also referred to as polyester film) “Mylar” in the packaging world. Mylar bags in the real world almost never contain only one material; instead, they are lamination techniques of multiple layers, with each layer serving a particular function.
Most food grade Mylar bags contain the following:
– An outer polyester layer for durability and printability
– An aluminum foil layer for the barrier of oxygen and moisture
– An inner layer of material that will be in contact with your food, which is typically polyethylene.
The most important layer of the three is the inner layer, as that is where the potential for toxic substances exists because it is in contact with your food, herbs, supplements, or consumer goods.
Are Mylar Bags Food Safe?
Yes, Mylar bags meant for food storage are considered safe for human consumption. Many Mylar bags are multi-layer and have an inner layer made of polyethylene which is designed for contact with food under normal temperature and humidity conditions. This inner layer has been approved by the FDA/USDA as a safe material for use in the packaging of food products, and will not leach harmful chemicals into food products either.
Problems occur only when the bags are not manufactured to the required quality standards or are used outside of their intended specifications, such as not being labeled properly.
Do Mylar Bags Leach Chemicals?
Normally produced Mylar bags are not going to leach any harmful chemical substances at an acceptable level. They were made to be chemically stable and odour free as well as to resist moisture, oxygen and light.
However, problems may arise when:
- The bags are not food grade
- The bags use low quality adhesives or inks
- The bags are exposed to excessive heat over long periods of time
- Bags are reused in ways they were not intended to be used
That is why using a reliable source with proper specifications is more important than just the name of the material.
What About BPA and Other Toxins?
Mylar bags of good quality do not contain BPA (polyvinyl chloride) commonly found in some polycarbonates. Food contact compliance should be assured because ExxonMobil has confirmed Mylar’s high-quality properties when producing its product line. Mylar provides a very secure method for storing food items.
Suppliers should be able to provide detailed information regarding their food safety protocols, specifications and compliance with regulations. Failure to provide these details is a sign of concern.
What About Custom Mylar Bags?
Custom Mylar bags can be just as safe as standard types of Mylar bags provided that they’re made using food grade materials and printed using methods that are compliant with food industry guidelines. The fact that the bag has been customized doesn’t mean it’s a harmful product. It’s only important to ensure that the inks, adhesives, and inner food contact layer of the custom Mylar bag were intended for contact with food, and that they underwent proper curing processes as part of the production process.
The use of only non-toxic ink on the exterior only and clean, food contact-safe polyethylene on the interior of the custom Mylar bag ensures that they’re safe for use with foods, dietary supplements, and other consumer goods provided they meet the criteria outlined by the FDA for manufacturing according to FDA standards for food contact and are utilized as per the manufacturer’s recommended use.
Are Mylar Bags Suitable for Long-Term Storage?
Mylar bags are often used to store dry foods, such as coffee, grains, dehydration meals and supplements, over an extended period of time. The composition of Mylar bags consists of multiple layers which provide a barrier to both oxygen and moisture, thus preserving both the freshness and the shelf life without leaching any toxic chemical substances into items stored in the bag.
This is the reason why Mylar bags are used for many different types of applications in several industries. Examples of how Mylar Bags may be used include:
1. Emergency Food Storage.
2. Commercial Food Packaging.
3. Pharmaceutical Companies/Supplements.
4. Herbal Products.
It is recommended to utilize specific-sized Mylar bags that have been specifically manufactured for the intended purpose of storing your item(s).
When Mylar Bags Can Become Unsafe
Mylar bags are not invincible or supernatural. If they are used incorrectly, they can become a danger to your health.
Do not do any of the following:
- Do not heat them on a stove or with flames.
- Do not store very acidic or solvent based materials, unless the packaging indicates it will be safe.
- Do not re-use Mylar bags made for one time use repeatedly for containing heating foods.
Using an appropriate bag to store food eliminates almost all safety concerns.
Final Answer: Are Mylar Bags Toxic?
No, Mylar bags are not toxic when they are properly manufactured, food grade, and used as intended. They are one of the safest and most widely trusted packaging materials in modern food and consumer goods storage.
The real risk is not Mylar itself, but low quality manufacturing, unclear specifications, and misuse. When sourced responsibly, Mylar bags remain a safe, reliable, and non toxic packaging solution.
