This blog is to provide useful information, to existing and prospective clients; on all aspects of cosmetic contract manufacturing.
“PRESERVATIVES the necessary evil in skin care products”
How do Preservatives actually work?
“Preservatives are thought to act by disrupting membrane transport processes or by inhibiting synthesis of DNA and RNA or of some key enzymes, such as ATPases and phosphotransferases, in some bacterial species. Propylparaben is considered more active against most bacteria than methylparaben.
The stronger antibacterial action of propylparaben may be due to its greater solubility in the bacterial membrane, which may allow it to reach cytoplasmic targets in greater concentrations. However, since a majority of the studies on the mechanism of action of parabens suggest that their antibacterial action is linked to the membrane, it is possible that its greater lipid solubility disrupts the lipid bilayer, thereby interfering with bacterial membrane transport processes and perhaps causing the leakage of intracellular constituents.” https://en.wikipedia.org/wiki/Paraben
Ortron is always keeping abreast of issues with certain raw materials and evaluates their potential hazards. Where possible we substitute ingredients which have questionable properties with much more acceptable ones. There are some very useful alternatives to parabens and Methyl chloroisothiazolinone & methyl isothiazolinone MIT, some are from natural sources. These alternatives will be discussed in more detail in another part to this topic of discussion regarding preservatives.
Two that are currently being debated and phased out due to major claims against them are Methyl ethyl propyl butyl isobutyl para benzoic acid (Parabens) and Methyl chloroisothiazolinone & methyl isothiazolinone (MIT).
In part 3 we will examine what the issues are with Methyl ethyl propyl butyl isobutyl para benzoic acid (Parabens)
PRESERVATIVES the necessary evil in skin care products Part 1
The 3 things that spoil your cream, probably about the only truly natural thing in your product
As unfortunate as it is, preservatives are very necessary in formulations or else products will exhibit very little to no shelf life. They prevent most bugs, or microorganisms, from ruining the formulations.
There are three types of contaminants that can spoil a formulation. They are bacteria, moulds and yeast. When these contaminants do develop, you can probably consider them the only true natural organic matter that would then be present in a formulation.
Preservatives are needed to protect all phases in the formulation, namely the oil, water and solid phase. To achieve this comprehensive protection antimicrobials are used. There are many types of preservatives to choose from. The list unfortunately, becomes smaller all the time as claims are made against certain types and requests are made for those types to be phased out.
Antimicrobials used in products prevent the growth of moulds, yeasts, and bacteria.
Antioxidants prevent personal care products from becoming rancid or brown, or sometimes even developing black spots. Antioxidants suppress reactions that may occur when ingredients in the product combine with oxygen in the presence of light, heat, and some metals. Antioxidants also minimize the damage to some essential ingredients or materials that are especially susceptible to oxidative damage.
Rancid personal care products may not make you sick, but they might smell bad or have a different colour or consistency from the original.
Part 2 will be examining how preservatives actually function.Continue reading