Yes, the great majority have no, or just a few, side effects
Compare 3 Reputable DSIP Sources BioInfinity: Lyophilized DSIP available in 5 mg and 10 mg vials Limitless Biotech: Prepared DSIP research spray in a 5 mL bottle Sports Technology Labs: Lyophilized DSIP available in a 5 mg vial The guide also compares current pricing, stated purity, third-party testing information, shipping policies, and available certificates of analysis
occasional mild digestive effects such as bloating, heartburn, or a feeling of fullness have been reported, with no major adverse events documented in clinical trials
I am happy to say that your B12 works
The financial mathematics simply do not work for substances that competitors could synthesize and sell immediately upon approval
As with any active, patch testing on a small area before full-face use is prudent, and anyone with very reactive skin or a known copper sensitivity should be cautious