KARATS OR CARATS?.... CARROTS?
Jun 02 - 2022
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Natural preservatives are ingredients that are found in nature and can — without artificial processing or synthesis with other substances — prevent products from prematurely spoiling.
These substances can be safe, effective alternatives to controversial synthetic preservatives such as parabens.
There are no federal laws that define what natural preservatives are. To avoid legal risks, some corporations instead claim “no artificial preservatives,” according to Campo Verde Solutions Founder Kim Greenfeld, who has decades of experience in the organic food industry.
Because of this lack of regulation around the term, people have made assumptions about what natural preservatives are and how they work. Some consumers have believed, for example, that vitamin E can act as a natural preservative. In reality vitamin E, even in its oil form, is only useful as a supplement and skin treatment.
We’re here to clear up all that confusion and help you understand exactly what natural preservatives are.
What Are Natural Preservatives Used for?
Manufacturers use natural preservatives to extend the shelf life of their products, reduce spoilage and retain smell or taste. After all, the goods need to survive the shipping process, and they might be sitting in a store or warehouse for a while before someone buys them.
Natural preservatives are popular in natural brands of cosmetic products, including makeup and moisturizers. These ingredients are also common in shelf-stable food products such as peanut butter and jelly.
To become available for consumption, most of these formulas need to pass a preservative efficacy test [PET], also known as a “challenge test.” This process simulates natural contamination by injecting products with microorganisms. If the preservative succeeds in eradicating these organisms, the product is ready for market.
Like synthetic preservatives, natural preservatives fall within the category of what scientists and industry insiders often call a “preservative system.” This phrase refers to three ways preservatives tend to work, and we added antibacterial to make the list four total:
- antimicrobial: inhibits the growth of microbes such as bacteria and fungi
- antibacterial: inhibits the growth of bacteria such as mold and yeast
- antioxidants: delays or stops the process of oxidation (usually the beginning of something deteriorating because it is losing electrons)
- acting on enzymes: stops aging of cosmetic products
Popular Natural Preservatives
The most popular natural preservatives are harmless substances we’re all familiar with:
- salt
- lemon juice
- grapefruit seed extract
- Rosemary extract
- sugar
- citric acid (from citrus fruits)
To give you an idea of why these ingredients are so special, let’s get into what Rosemary extract is and how it can protect products. The process starts with deriving antioxidants from Rosemary leaves via a method called carbon dioxide extraction. As we mentioned when explaining a preservative system, antioxidants can prevent organic substances from deteriorating.
The extraction creates a small amount of oil that can be mixed into products. Rosemary extract in particular is very popular for cosmetics.
