[ref] Not only is B6 important in dopamine production, but it is also important in the creation of glutathione (an antioxidant) in the brain.[ref] Parkinsons patients on L-DOPA also often have low or deficient B6 levels.[ref] Related article : Parkinsons disease and genetic susceptibility Chronic inflammation: Inflammatory conditions, including rheumatoid arthritis, IBD, diabetes, cancer, and deep vein thrombosis, are all associated with low vitamin B6 levels.[ref] While inflammatory conditions are linked to low vitamin B6 levels, it may be (at least partly) because systemic inflammation decreases the bodys P5P levels, and dietary intake isnt sufficient to meet the increased need.[ref] Related article: Chronic inflammation and personalized solutions Asthma and COPD: A recent study showed that higher vitamin B6 intake correlates with higher FEV1 levels (lung function test) in CoPD

Without enough amino acids, the skin may struggle to repair itself, regenerate new cells, and maintain its natural elasticity
Hair thinning has been noted in association with retatrutide, likely related to rapid weight loss triggering telogen effluvium, though a direct pharmacological effect cannot be excluded as alopecia is listed as an adverse reaction with some licensed GLP-1 receptor agonists
References: Perspectives into the experience of successful, substantial long-term weight-loss maintenance: a systematic review
Monitor your energy: Note down when you feel most tired to see if it correlates with your meal timing