About practical factors: Do you strongly prefer pills over injections, or vice versa
The effects of ALCAR powder supplementation have been widely researched in various areas including anti-aging, mental and sports performance, anxiety and mood improvement, weight loss and treatment of diseases such as Alzheimer's and Parkinson's
Some of the most common are nausea, diarrhea, and fatigue
Gastrointestinal adverse events Very common (10% or more): Diarrhea (35%), abdominal pain (21%), vomiting (21%), nausea (12%) Common (1% to 10%): Constipation, dyspepsia, gastrointestinal disorder, melena Very rare (less than 0.01%): Abdominal cramps [Ref] Nervous system Very common (10% or more): Headache (37%), dizziness (18%), paresthesia (12%) Common (1% to 10%): Hypertonia, vertigo, taste perversion Frequency not reported : Seizures (with or without pre-existing seizure activity), increase in seizure frequency and/or severity [Ref] Metabolic Very common (10% or more): Hypercalcemia (15%), hypervolemia (12%) Common (1% to 10%): Anorexia, hyperkalemia [Ref] There are reports from clinical trials of significant hypertriglyceridemia associated with high doses of levocarnitine (3 g/day) given to uremic dialysis patients
Additionally, baseline insulin sensitivity and the presence of metabolic conditions (such as type 2 diabetes) can either accelerate or modestly delay initial responses
