From the FDA Drug Label
Signs and symptoms reported in the literature after caffeine overdose in preterm infants include ... jitteriness, insomnia, fine tremor of the extremities, hypertonia, opisthotonos, tonic-clonic movements, nonpurposeful jaw and lip movements ... Adverse events described in the published literature include: central nervous system stimulation (i.e., irritability, restlessness, jitteriness)
The consumption of 600mg of caffeine may cause muscle twitching in some individuals, as jitteriness and fine tremor of the extremities are reported in the literature as symptoms of caffeine overdose. However, it is not possible to conclude that it would definitely cause muscle twitching in every individual, as the effects of caffeine can vary greatly from person to person 1. The addition of 1.5 teaspoons of salt does not have a clear interaction with caffeine in the provided drug labels.
From the Research
No, consuming 600mg of caffeine and 1.5 teaspoons of salt will not definitely cause muscle twitching in every individual. Responses to these substances vary significantly based on individual factors such as body weight, tolerance, metabolism, and underlying health conditions. While this caffeine amount (equivalent to about 6 cups of coffee) exceeds the FDA's recommended daily limit of 400mg and could potentially cause side effects including muscle twitches, jitteriness, anxiety, and heart palpitations in many people, some individuals with high caffeine tolerance might not experience twitching 2. Similarly, 1.5 teaspoons of salt (about 9,000mg of sodium) far exceeds the recommended daily intake of 2,300mg and could disrupt electrolyte balance, potentially contributing to muscle twitching in some people 3. However, the body's homeostatic mechanisms may prevent twitching in others, especially those with normal kidney function who can efficiently excrete excess sodium. The combination of both substances might increase the likelihood of muscle twitching but would not guarantee this symptom in every person who consumes them. It's also worth noting that individual responses to caffeine can vary greatly, with some people experiencing adverse effects at much lower doses, as highlighted in a study on caffeine's impact on human health 4. Additionally, a case study on fatal caffeine poisoning 5 and a review of caffeine's effects on exercise performance 2 further emphasize the importance of considering individual factors when assessing the potential effects of caffeine consumption. Moreover, the impact of salt intake on health, including its potential to contribute to hypertension and other cardiovascular issues, is well-documented 3, but this does not directly translate to a guaranteed effect on muscle twitching for every individual consuming 1.5 teaspoons of salt. Overall, while consuming 600mg of caffeine and 1.5 teaspoons of salt may increase the risk of muscle twitching in some individuals, it will not definitely cause this symptom in every person due to the wide variability in individual responses to these substances.