One alternative is L-phenylalanine. Smart Basics (1-800-878-6520)
sells "Rise & Shine", an "energizing nutrient drink" with this as the
active ingredient, though it can have similar side effects to caffeine
and shouldn't be taken by "persons with the genetic metabolic disorder
PKU, psychosis, persons taking prescription MAO inhibitor drugs,
pigmented malignant melanoma cancer patients, those with Wilson's
disease or those who have a violent temper", according to the label.
You can check
http://www.smartbasic.com/cat.durk.sandy/rise_shine.html
Mark Crosby
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