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Lactic vs Citric acid for ph in a gel cream
Is there any reason to use one vs the other for lowering ph in and face gel cream? I am using Sepinov EMT 10 as emulsifier if that makes any difference. Thanks!
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6 Replies
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Cost.
All though, my chemist suggested to me, that lactic is more skin friendly.
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The smell can be a problem with lactic acid. especially in a face product if the Perfum is not strong enough.
The advantage of LActic acid is more skin-friendly and there is some evidence that it helps against microbes.
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Ok good to know. So other than those differences mentioned neither one is better/worse for stability of the emulsion?
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Citric acid is also completely skin friendly. But lactic acid has extra benefits like exfoliation and skin hydration.
Citric acid creates problems with cationic ingredients
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Ive noticed that citric acid can lower the viscosity of emulsions made with some seppic polymers, would lactic acid also do this?
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Lactic acid is less likely to interfere with other ingredients and hence is less likely to cause a drop in viscosity. Citric acid and cationics as an example are not the best combo whilst lactic acid would work.Lactic acid (given that you don’t use a super diluted form) also drops pH stronger per gram added. On the other hand, citric acid has a better buffering (something you usually don’t really need…) and an intermediate chelating capacity (wouldn’t rely solely on citric acid as chelate, though).
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