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Though it can be derived from the comfrey plant, allantoin is produced synthetically for cosmetic products to ensure purity

The term purity is most accurate when applied to raw peptide materials, isolated compounds, or lyophilized peptide powders where a single active compound is measured against potential impurities

PubMed Central , Molecular Biology Reports , vol

This results in softer, more supple skin with increased resistance to environmental stressors

Tolerability: Side Effects and Comfort Most people handle glutathione well, which makes it a good choice for many users

Licorice Extract a soothing, natural ingredient often included for its calming and brightening properties