Visible skin changes typically appear after 8-12 weeks of consistent daily supplementation
For example, individuals with heart, kidney, or thyroid problems, cancer, or an auto-immune disease may experience complications with this medication and should consult their doctor first
For vegetarians and vegans, obtaining sufficient L-Carnitine can be more challenging, as plant-based sources generally contain lower amounts of this nutrient
Symptoms include: Coma Confusion Dizziness, lightheadedness Extreme fatigue, weakness, or discomfort Fast or slow heartbeat Feeling cold, especially in your hands or feet Muscle pain Nausea, vomiting, stomach pain Numbness/tingling Rapid breathing or shortness of breath Skin flushing Sweating Tremors Potential medication interactions Some medications may increase your risk of developing serious side effects if taken with metformin
Alvestrand, A., Furst, P
PLOS ONE, 2013