Glycyrrhetinic Acid and Aminophylline are active ingredients often used in topical formulations designed to help reduce the appearance of localized fat and improve skin firmness
For milder cases, you might see subtle boosts in energy, brain fog reduction, and mood lifts within the first week or two
But also, the opposite way is conceivable: if there is a lack of biotin, vitamin B12 cannot fulfil its function in the citrate cycle and remains unused in the tissue possibly leading to the behavioural change of the skin bacteria already discussed
PubMed: 24791752Clinical (RCT / meta-analysis) ref-2.Kumar P, Liu C, Suliburk J, Hsu JW, Muthupillai R, Jahoor F, Minard CG, Taffet GE, Sekhar RV Supplementing Glycine and N-Acetylcysteine (GlyNAC) in Older Adults Improves Glutathione Deficiency, Oxidative Stress, Mitochondrial Dysfunction, Inflammation, Physical Function, and Aging Hallmarks: A Randomized Clinical Trial
cAMP-dependent protein kinase and protein kinase C consensus site mutations of the beta-adrenergic receptor