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That difference is what matters here

The raw cost of synthesized peptides from Chinese manufacturers where virtually all US vendors source is significantly lower than either vendor's retail pricing

The label also specifies not to exceed the suggested use and to keep the product out of reach of children

These fall under a different regulatory category, and their safety and quality controls vary dramatically

So you might be within range, but maybe not functioning your best

IGF-1 LR3 (insulin-like growth factor-1 long arginine 3) is a synthetically modified derivative of insulin-like growth factor-1, which is produced in the liver in response to growth hormone endocrine stimulus