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That is not nothing consistent effects across many animal models and delivery routes are a legitimate reason for scientific interest but it is a long way from demonstrated efficacy in humans

The article's concern is effectiveness rather than toxicity

Several factors often contribute to a stalled weight trend

The elusive roles of bacterial glutathione S-transferases: new lessons from genomes

The concern is that if you overstimulate melanocytes, particularly in someone who has an underlying tendency to skin cancer, you could increase the risk of melanoma developing. In addition, melanotan II often goes along with other risky sun-seeking behaviour such as sunbed usage, Dr Wedgeworth says