The review found no significant difference in outcomes, and in one case, oral B12 even outperformed injections in raising blood levels A more recent 2020 randomised controlled trial from Spain further supports this
On the one hand, some suggest that these medications may disrupt hair growth cycles or accelerate androgenetic alopecia in predisposed individuals
Nutritional/dietary supplements, including vitamins and minerals, are not well regulated and may cause a positive drug test
However, the role of p53 in regulation of IGF-1R seems to be more complex and probably also involves post-transcriptional mechanisms (Girnita et al, 2000
As a lozenge, you experience the effects immediately
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