The safest and most science-backed use of the peptide is in professionally formulated topical creams and when injected by a dermatologist combined with other treatments such as microneedling and skin resurfacing
It is important to look at the context of this warning: Animal Studies: The warning is based on studies in rats and mice, where long-term exposure to these drugs led to the development of medullary thyroid carcinoma (MTC)
ElastiK Skin is designed to support the look, feel and comfort of skin through visible change, not promise impossible results
Research shows that combining higher protein intake with resistance exercise preserves lean mass and improves body composition during caloric deficit, and a 2025 systematic review found that exercise interventions alongside GLP-1 medications produced better outcomes for body composition than medication alone
(4) Similarly, the clinical study on models of diabetic neuropathic ulcers reported that GHK-Cu, combined with standard wound care, appeared more impactful for wound closure than standard care alone
Robison says