There is a theoretical risk of accelerated growth of pre-existing cancers, as IGF-1 is a growth factor [1]
Anti-Aging: Age-related GH decline and restoration research using physiological pulsatile dosing
(Blue-tinged skin, resulting from inadequate oxygen levels in the blood, is a hallmark symptom of methemoglobinemia, so it's somewhat ironic that the treatment itself is a shocking blue color.) But the short-term use of a pharmaceutical-grade product in a controlled setting under the supervision of a skilled medical provider is different than buying an unregulated supplement off the internet and taking it every day because you've heard that it will give you loads of energy by "enhancing mitochondrial efficiency." In light of the increased attention being paid to the inky liquid, it makes sense to learn a bit about methylene blue's history, how it works, and whether its various health claims stand up to closer scrutiny
Proper counseling, labeling, and dispensing protocols are essential to reduce the risk of overdoses and associated hospitalizations
These may include leaking vessels, reduced blood flow in small capillaries, or other signs similar to diabetic retinopathy progression