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The presence of senescent cells in tissues may vary among individuals, with some aging populations showing greater senescence burden than others

Ogrendik, M

Rather than directly activating GABA-A receptors, the peptide appears to maintain homeostasis of the entire GABA receptor complex, preventing the desensitization and compensatory changes that produce tolerance and dependence

On the other hand, peptides have a variety of effects, and may increase collagen, elastin, and glycoprotein production, thereby increasing skin thickness and elasticity

Nasal delivery systems are gaining share for their bioavailability and convenience

The comparison in this article is therefore assembled from separate bodies of evidence human topical cosmetic studies on one side, animal and mechanistic work on the other rather than from a single trial that pits the routes against each other