If you feel good and want more support, you can gradually increase to the full recommended serving
Vitamin B12 is an essential nutrient involved in how the body produces energy and supports neurological function
(8) Koustav Roy, Garima Chauhan, Punita Kumari, Meetu Wadhwa, et al (2018) Phosphorylated delta sleep inducing peptide restores spatial memory and p-CREB expression by improving sleep architecture at high altitude Life Sciences, Volume 209, 15 September 2018, Pages 282-290
It is also generally advised against people having Wilson's disease or any other health issue affecting copper metabolism, because of the presence of copper-binding peptide in this formulation
Severe or persistent nausea should prompt a dose reduction or extension of the titration timeline