As an aside, we are unsure if the fatigue is purely down to B12 deficiency or if its long covid" If your B12 deficiency is not due to diet, I'd expect GP to at least test you for PA and Coeliac disease, two autoimmune conditions that can lead to B12 deficiency
If you are dealing with worse sleep disturbances, maybe youre in a structured therapeutic or research situation, are okay with injections, and you want a more potent and fast-acting route, then injectable DSIP could be the better fit
For instance, one study indicated that participants with obesity who had elevated glutathione levels lost more weight than those with lower levels when adhering to a healthy eating plan
Features a triple-action formula of: 1.5x Glutathione 2 Vitamin C Derivatives Arbutin One bottle targets four key skin issues refining pores, improving roughness, reducing dullness, and enhancing clarity, texture, and luminosity