Thank you for your question. I would not recommend; even though the chances of any problems( toxicity or longevity of the product) are trivial. Multiple scientific papers on HA fillers (hyaluronic acid gel ) have been resulting in NO bacterial and/or fungal growth for up to 2 years when stored at room temperature.
There is no way to guarantee that you will get the same smooth, natural-looking results when using an expired product. Further, injectables really do need to be administered by a trained and experienced professional to ensure not only great results but also your safety. I would suggest finding a cosmetic surgeon or reputable medical spa in your area and having a professional perform your injections. When it comes to your safety and satisfaction with your results, you really don’t want to skimp on costs.