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They can also be called functional foods and in Canada, for example, there is no distinction between functional foods and nutraceuticals and are considered a product with a physiological benefit or protective capacity

Quantity Whats Inside: Repairs, Firms, Regenerates A powerful skin-repairing peptide that helps support collagen production, improve elasticity, visibly soften fine lines, and strengthen the skin barrier

Cent Nery Syst Agents Med Chem 9: 300-306

That does not invalidate DSIPs use as a subcutaneously injected peptide, but it changes the degree of certainty you should expect with the results you get

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