Should i drink water with salt right after wake up?

Yes—if you drink caffeine or are fasting, a small pinch of salt in water after waking may help with lightheadedness, shakiness, or feeling jittery. Caffeine can increase the loss of water and sodium, and Huberman describes using water with a pinch of salt to help offset those effects. 1 2

• Amount: Keep it to a small pinch; this isn’t a reason to add lots of salt. 3
• Caution: If you have high blood pressure, be careful about increasing sodium. 4

It’s optional—not a universal requirement for everyone who wakes up.