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They might do tests or exams to find whats causing your irregular periods

doi: 10.1158/0008-5472.CAN-07-2593

Precautions Do not use in patients with a known allergy or previous hypersensitivity reaction to any ingredients, active inflammation of a superficial vein, significant dysfunction of vein valves or deep vein insufficiency, large superficial veins that connect to deeper veins, a history of migratory phlebitis, or an active skin and soft tissue infection, such as cellulitis

10.1016/j.lfs.2021.119767 Life Sci

Creatine supplementation takes this a step further, as it has been shown that older adults who supplement with creatine and resistance train have better strength and muscle gain results than those who resistance train but do not take creatine