The Bottom Line The core protocol: 100 to 300 mcg subcutaneously, 30 to 60 minutes before bed, cycled 2 to 4 weeks on and 2 weeks off
Lian Z, Wang J, Cao Y, et al
The goal is to bypass the digestive system entirely by absorbing the nutrient through the mucous membranes in the mouth
Results build progressively most users notice visible improvements in skin texture and radiance within the first few weeks, with collagen-related improvements (firmness, wrinkle reduction) developing over 2 to 3 months of consistent use
IGF-II also binds to the IGF-II receptor (also named the cation-independent mannose 6-phosphate receptor), which acts as a signaling antagonist to prevent IGF-II responses
Stability and packaging, 15%: Preference for brands that design around antioxidant integrity and consistency