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The most defensible summary is the narrowest one: Epitalon is a synthetic tetrapeptide with reproducible in vitro telomerase and telomere-length activity in selected human cell lines, a circumscribed rodent dataset, and an open-label Russian cohort literature suggestive of geroprotective effects in elderly populations

Embrace the power of both to achieve a resilient, radiant, and youthful complexion

The effects of B12 vitamins often last 48 to 72 hours after the initial injection, though it varies slightly from person to person

The "safer" option depends on which specific side effects are most concerning to you and your individual risk factors