Petfood Industry - May 2019 - 46

46 | www.PetfoodIndustry.com

INGREDIENT ISSUES

Greg Aldrich, PhD

Synthetic preservatives in my
pet's food - no thanks!
Why do we add preservatives? To stabilize
the food from spoilage and rancidity.
Two distinct issues are addressed with
preservatives: microbial and oxidative
degradation.

Microbial degradation

Synthetic preservatives
are causing some strife
alongside the 'clean
label' trend, but there are
challenges with using natural
alternatives.
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Modern food chemistry
has allowed us to create
convenient, nutritious foods
that are available year-round,
retain their freshness, fulfill
the animal's nutrient needs
and are shelf stable for months.
Besides advances in packaging, much of the
improvement in shelf life was made possible
by synthetic preservatives. This has not been
by accident. These food chemicals have come
about through deliberate development and
have passed rigorous testing for safety and
efficacy. But, human nature being what it is,
a level of distrust persists and consumers are
requesting natural alternatives.

Microbial degradation is generally a
function of mold growth (fungi), though
some amount of pathogenic bacterial
contamination (such as E. coli, Salmonella,
Listeria) has now been enveloped under
this umbrella of microbial control. The
key concept is that all foods, no matter the
process, are exposed to bacteria and fungi.
For food to mold, all it takes is the slightest
amount of moisture, warmth and time for
the fungi to grow. This is true for our own
foods; prime examples would be bread
and cheese. Thus, we must control water
activity and temperature, and inhibit the
organism's growth in some manner.
First things first: Beyond refrigeration and
drying, we have to control active moisture (water
activity). This is especially important in semimoist foods, but can also crop up in large piecesized baked treats. To control water activity, we
can bake/dry the food down to a low level or use
ingredients that bind water. These water-binding
ingredients are often referred to as humectants.
They include sugars known as polyols - sugar
alcohols like propylene glycol and glycerin, or
we can substitute with various vegetable syrups

Dr. Aldrich is president of Pet Food & Ingredient Technology Inc. He is also the author of Petfood Industry magazine's monthly
column, "Ingredient Insights."

May 2019

Industry


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Petfood Industry - May 2019

Table of Contents for the Digital Edition of Petfood Industry - May 2019

Petfood Industry - May 2019
Contents
Pet food M&A reaches throughout the supply chain
Speaking of…
Top 50 companies in 2019
Latin America pet food ingredient use: local vs. imported
Is pet food production signaling recession in Mexico?
Brazil pet food market likely to maintain positive growth
Venezuela’s crisis is worsening pets’ nutrition
Argentina: pet-loving market dealing with poor economy
Guide to Petfood Forum Europe 2019
Independent Conclusions of GRAS: Will AAFCO allow?
Synthetic preservatives in my pet’s food —no thanks!
Pet market trends: signals from pet services
New Products
Marketplace
Advertiser’s Index May
Petfood Industry - May 2019 - BB1
Petfood Industry - May 2019 - BB2
Petfood Industry - May 2019 - Petfood Industry - May 2019
Petfood Industry - May 2019 - Cover2
Petfood Industry - May 2019 - 1
Petfood Industry - May 2019 - Contents
Petfood Industry - May 2019 - 3
Petfood Industry - May 2019 - Pet food M&A reaches throughout the supply chain
Petfood Industry - May 2019 - 5
Petfood Industry - May 2019 - Speaking of…
Petfood Industry - May 2019 - 7
Petfood Industry - May 2019 - 8
Petfood Industry - May 2019 - 9
Petfood Industry - May 2019 - Top 50 companies in 2019
Petfood Industry - May 2019 - 11
Petfood Industry - May 2019 - 12
Petfood Industry - May 2019 - 13
Petfood Industry - May 2019 - 14
Petfood Industry - May 2019 - 15
Petfood Industry - May 2019 - 16
Petfood Industry - May 2019 - 17
Petfood Industry - May 2019 - 18
Petfood Industry - May 2019 - 19
Petfood Industry - May 2019 - Latin America pet food ingredient use: local vs. imported
Petfood Industry - May 2019 - 21
Petfood Industry - May 2019 - 22
Petfood Industry - May 2019 - 23
Petfood Industry - May 2019 - Is pet food production signaling recession in Mexico?
Petfood Industry - May 2019 - 25
Petfood Industry - May 2019 - Brazil pet food market likely to maintain positive growth
Petfood Industry - May 2019 - 27
Petfood Industry - May 2019 - Venezuela’s crisis is worsening pets’ nutrition
Petfood Industry - May 2019 - 29
Petfood Industry - May 2019 - 30
Petfood Industry - May 2019 - 31
Petfood Industry - May 2019 - 32
Petfood Industry - May 2019 - 33
Petfood Industry - May 2019 - Argentina: pet-loving market dealing with poor economy
Petfood Industry - May 2019 - 35
Petfood Industry - May 2019 - 36
Petfood Industry - May 2019 - 37
Petfood Industry - May 2019 - Guide to Petfood Forum Europe 2019
Petfood Industry - May 2019 - 39
Petfood Industry - May 2019 - 40
Petfood Industry - May 2019 - 41
Petfood Industry - May 2019 - Independent Conclusions of GRAS: Will AAFCO allow?
Petfood Industry - May 2019 - 43
Petfood Industry - May 2019 - 44
Petfood Industry - May 2019 - 45
Petfood Industry - May 2019 - Synthetic preservatives in my pet’s food —no thanks!
Petfood Industry - May 2019 - 47
Petfood Industry - May 2019 - 48
Petfood Industry - May 2019 - 49
Petfood Industry - May 2019 - Pet market trends: signals from pet services
Petfood Industry - May 2019 - 51
Petfood Industry - May 2019 - 52
Petfood Industry - May 2019 - New Products
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Petfood Industry - May 2019 - 55
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Petfood Industry - May 2019 - Marketplace
Petfood Industry - May 2019 - 63
Petfood Industry - May 2019 - Advertiser’s Index May
Petfood Industry - May 2019 - Cover3
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