A sports dietitian is reviewing a client's supplement stack that includes a pre-workout product containing both caffeine and synephrine. What is the primary safety concern with this combination?
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A
Reduced caffeine bioavailability when taken together
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B
Additive or synergistic stimulant effects increasing cardiovascular risk
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C
Synephrine blocks caffeine's ergogenic effects
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D
Gastrointestinal distress exclusively, with no cardiovascular implications