Flowers of sulfur is a very different substance and has caused serious signs at extremely high accidental intakes, but those reactions are considered unlikely with MSM even at comparatively high doses
With consistent use, it helps reveal a more radiant and youthful look, even reducing signs of fatigue
Because clinically ill cats can have different glutathione-related profiles than healthy cats, dosing decisions should be vet-guided rather than improvised (Viviano KR, 2009)
doi: 10.1038/srep10637 (2015)
Those who wonder, can iron supplements cause diarrhea if taken for long periods, should understand that chronic irritation or poor absorption may worsen digestive discomfort and interfere with consistent iron therapy
Minoxidil is FDA-approved and works primarily by increasing blood flow to hair follicles and extending the anagen (growth) phase of the hair cycle