Does
safe plastics mean safe for people, or safe for containers?
The
word "plastic" can mean a wide variety of
substances and contain many chemicals, some of which have been
identified as potentially harmful. Manufacturers often add
different chemicals to plastics to give them the exact
characteristics they’re looking for, like flexibility, strength,
and reduced production cost. These chemicals
include dioxins, cadmium, parabens, bisphenol A, phthalates,
polychlorinated biphenyls (PCBs), agricultural chemicals,
polybrominated flame retardants, and some of the active ingredients
in sunscreens. These are called endocrine
disruptors, substances which when taken into our bodies,
alter normal hormonal function.
Latest
research has given us a lot of good reasons to think carefully about how
we use plastics. Although
some of these plastics are considered safe, there is still risk, no
matter how small.
You
can identify the type of plastic in a container by looking at the
recycling code number.
-
Type 1: Polyethylene Teraphthalate - Do Not Reuse
These
are made from polyethylene terephthalate, or PET. These are the soft
plastic bottles most commonly used for bottled water. PET bottles
contain no BPA or faux-estrogen, but do pose potential health
risks. These bottles are often linked to bacterial contamination
when they are re-used. This is primarily due to the bottle's
design and cleaning detergents and high temperatures can
cause chemicals to leach out of the plastic. PET plastic is recyclable
and about 25% of PET bottles in the US today are recycled. The
plastic is crushed and then shredded into small flakes which are then
reprocessed to make new PET bottles, or spun into polyester fiber.
This recycled fiber is used to make textiles such as fleece garments,
carpets, stuffing for pillows and life jackets, and similar products.
Products made of PET plastic should be recycled but not reused.
-
Type 2: High-Density Polyethylene – Safe
It
is a type of plastic that’s tougher and stronger and can endure
higher temperatures than most other polymers. HDPE, which is
considered a low-hazard plastic, is often used for milk, water and
juice bottles, as well as bottles for cleaning supplies and shampoo.
It's also used to make grocery bags and cereal box liners. HDPE
plastic is very hard-wearing and does not break down under exposure
to sunlight or extremes of heating or freezing. For this reason, HDPE
is used to make picnic tables, plastic lumber, waste bins, park
benches, bed liners for trucks and other products which require
durability and weather-resistance. Products made of HDPE are
reusable and recyclable. HDPE (like most plastics) has been
found to release estrogenic chemicals.
-
Type 3: Polyvinyl Chloride - Contains Phthalates
PVC
plastic can be rigid or flexible, and is commonly found in bags for
bedding, shrink wrap, deli and meat wrap, plastic toys, table cloths
and blister packs used to store medications. PVC contains toxic
chemicals including DEHP, a type of phthalate used as a plastics
softener. Phthalates are one of the groups of "gender-bending"
chemicals causing males of many species to become more female. These
chemicals have disrupted the endocrine systems of wildlife, causing
testicular cancer, genital deformations, low sperm counts and
infertility in a number of species, including polar bears, deer,
whales and otters, just to name a few. Products made using PVC
plastic are not recyclable. While some PCV products can be
repurposed, PVC products should not be reused for applications with
food or for children’s use.
-
Type 4: Low-Density Polyethylene – Safe
DPE
is used in bags for bread, newspapers, fresh produce, household
garbage and frozen foods, as well as in paper milk cartons and hot
and cold beverage cups. While LDPE does not contain BPA, it may pose
risks of leaching estrogenic chemicals, similar to HDPE. LDPE is
considered less toxic than other plastics, and relatively safe for
use. Products made using LDPE plastic are reusable, but not always
recyclable.
-
Type 5: Polypropylene – Safe
PP
plastic is used to make containers for yogurt, deli foods,
medications and takeout meals. While polypropylene is said to have a
high heat tolerance making it unlikely to leach chemicals, at least
one study found that PP plastic ware used for laboratory studies did
leach at least two chemicals.
-
Type 6: Polypropylene – Safe
Polystyrene,
also known as Styrofoam, is used to make cups, plates, bowls,
take-out containers, meat trays and more. Polystyrene is known to
leach styrene, which can damage your nervous system and is linked to
cancer, into your food. Temperature has been found to play a role in
how much styrene leaches from polystyrene containers, which means
using them for hot foods and beverages (such as hot coffee in a
polystyrene cup) may be worst of all. Because polystyrene is
structurally weak and ultra-lightweight, it breaks up easily and is
dispersed readily throughout the natural environment. Beaches all
over the world have bits of polystyrene lapping at the shores, and an
untold number of marine species have ingested this plastic with
immeasurable consequences to their health.
-
Type 7: Polycarbonate
Polycarbonate
(PC) plastics are a naturally transparent
amorphous thermoplastic.Polycarbonate is an incredibly useful
plastic for applications requiring transparency and high impact
resistance. Number 7 plastics are used to make baby bottles, sippy
cups, water cooler bottles and car parts. BPA is found in
polycarbonate plastic food containers often marked on the bottom with
the letters “PC” by the recycling label 7. Some polycarbonate
water bottles are marketed as ‘non-leaching’ for minimizing
plastic taste or odor, however there is still a possibility that
trace amounts of BPA will migrate from these containers, particularly
if used to heat liquids.
Bisphenol
A, or BPA, is one of the most commonly cited culprits, and is found
in hard plastic bottles marked with plastic code "7."The
BPA used in Type 7 plastic water bottles is linked to a number of
potential complications for pregnant women and the fetus. BPA acts as
a faux-estrogen, and can cause chromosomal abnormalities of fetus.
Water bottles containing BPA have also been linked to increased rates
of disease in adults. humans with the highest concentrations of BPA
in their urine are three times more likely to suffer from
cardiovascular disease and 2.4 times more likely to have Type 2
diabetes than people with low BPA concentrations.
It
is better to avoid reusing containers that are used for take-aways
and home delivery. According to studies, such plastic containers have
a high affinity for fats and once they come in contact with food high
in oil or fat-based substances, they can never be truly clean for a
second use. The plastic is irrevocably altered even though it was
originally marked as food grade. Also remember, that any containers,
if they have been used to store non-food items like detergent or
paint should never be used for storing food.
Plastics
with the recycling labels #1, #2 and #4 on the bottom are safer
choices and do not contain BPA. A new generation of compostable
plastics, made from bio-based polymers like corn starch, is being
developed to replace polycarbonates. These are also included in
category #7, which can be confusing to the consumer. These
compostable plastics have the initials “PLA” on the bottom near
the recycling symbol. Some may also say “Compostable.” PLA coded
plastics should be thrown in the compost and not the recycle bin
since PLA compostable plastics are not recyclable.
Since
it is impossible to totally eliminate plastic from our life, we can
limit our exposure to the worse offenders. The most important thing
we can do is take steps to help our body detoxify from any of the
toxins we may ingest. This can best be done by boosting our
intracellular glutathione.you can replace your favourite things with
glass, stainless-steel, or ceramic dishes. Still, better safe than
sorry.
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