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(2010) Stability of protein pharmaceuticals: an update

Be cautious when combining with other scalp actives : Some formulations may be affected by concurrent use of high-strength vitamin C (ascorbic acid) or exfoliating acids, though this is largely formulation-dependent and not well established clinically

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Both compounds require reconstitution equipment : bacteriostatic water, appropriate syringes (typically insulin syringes for cagrilintide and larger syringes for retatrutide high-dose protocols), alcohol swabs, and proper storage containers

Pharmaceutics, 17 (1), 119

But be sure to use the brand name Tylenol, which is made with gluten-free fillers, whereas generics often contain gluten