Taking three Limcee (vitamin C) 500 mg tablets, totaling 1500 mg, is generally safe as a one-time dose because vitamin C is water-soluble and any excess is naturally flushed out of the body. However, taking 1500 mg all at once might sometimes cause mild stomach upset, cramps, or diarrhea. For daily health, a much lower dose of about 90 mg is typically sufficient, with 2000 mg being the absolute daily limit. It is usually best to stick to one tablet daily unless a doctor advises otherwise.