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However, preclinical safety studies report no major toxicity across animal studies (mice, rats, rabbits, dogs) and showed no adverse effects across several organ systems

Studies have shown it can significantly increase collagen production, which is absolutely essential for maintaining firm, smooth skin

Research has examined its role in sleep regulation, stress modulation and neuroendocrine activity, including effects on circadian rhythm and interactions with the hypothalamic-pituitary axis

That research does not equal approval for injection

The researchers showed that FOXO4-DRI treatment induced apoptosis specifically in senescent chondrocytes while sparing healthy proliferating cells, confirming the selectivity mechanism described in the original Baar et al

Higher dosing (3-5mg daily) Some protocols call for higher doses, particularly for acute wound healing, significant tissue repair, or when combining injectable with topical applications