Most people find that one to two LMNT packets per day works well, depending on how much they sweat and what they eat. Each packet contains 1,000 mg of sodium, 200 mg of potassium, and 60 mg of magnesium, so the number that’s right for you depends heavily on your activity level, diet, and overall health.
What’s in a Single Packet
A single LMNT stick pack delivers 1,000 mg of sodium. That’s a significant dose. For comparison, standard dietary guidelines recommend keeping total sodium intake under 2,300 mg per day. So one packet alone accounts for nearly half that ceiling before you count anything you eat. This is the key number to keep in mind when deciding how many packets make sense for your situation.
The 200 mg of potassium and 60 mg of magnesium per packet are relatively modest amounts. Adults need roughly 2,600 to 3,400 mg of potassium and 310 to 420 mg of magnesium daily, so LMNT is primarily a sodium supplement with supporting electrolytes.
One Packet Per Day: The Default for Most People
If you exercise moderately, eat a mix of whole and packaged foods, and don’t follow a restrictive diet, one packet per day is a reasonable starting point. Many people use it as a morning drink or mix it into their water bottle during a workout. At 1,000 mg of sodium, a single packet plus a normal diet will put most people comfortably within or slightly above the 2,300 mg guideline.
For people who are mostly sedentary or get only light exercise, even one packet may be more sodium than you need, especially if your meals already include processed or restaurant food (which supplies about 70% of the average American’s sodium intake). In that case, you could split a packet across two servings or use it only on days you’re active.
Two or More Packets: When It Makes Sense
Heavier use makes more sense under a few specific circumstances. During intense or prolonged exercise, sodium losses through sweat can be substantial. Sweat rates typically range from about half a liter to two liters per hour, and sodium concentration in sweat varies widely between individuals. Athletes training hard in hot, humid conditions can lose several grams of sodium in a single session. Professional athletes’ trainers have reported logging up to 10 grams of sodium lost during a hard practice or game. For those athletes, two or even three packets spread across a training day barely replaces what they’ve sweated out.
Low-carb and ketogenic diets also shift the math. When carbohydrate intake drops, insulin levels fall, and your kidneys excrete more sodium than usual. At the same time, cutting out processed foods removes a major sodium source from your diet. Popular ketogenic diet resources commonly recommend 2,000 to 5,000 mg of supplemental sodium daily, which translates to two to five packets if LMNT is your only supplement. People who are fasting experience a similar effect: minimal food intake means minimal sodium coming in, while the body continues flushing it out.
Signs You’re Overdoing It
Your body gives clear signals when sodium intake is too high for your kidneys and hormones to regulate. Watch for headaches, nausea, bloating, or a noticeable increase in thirst that water doesn’t seem to fix. More serious signs of electrolyte overload include confusion, irregular heartbeat, muscle weakness, breathing difficulties, and persistent nausea or vomiting. If you experience any of these after increasing your intake, cut back.
A simpler early indicator: if your LMNT drink tastes overwhelmingly salty rather than pleasant, your body likely doesn’t need more sodium right now. Palatability tends to track with need. When you’re depleted, salty water tastes good. When you’re topped off, it doesn’t.
When to Be Cautious
High blood pressure is the most common reason to limit sodium. If you have hypertension, kidney disease, or heart failure, adding 1,000 to 2,000 mg of supplemental sodium on top of your diet could be harmful. The same goes for anyone taking medications that affect fluid balance or electrolyte levels, such as certain blood pressure drugs or diuretics. In these situations, the standard 2,300 mg daily cap (or lower) applies, and an electrolyte supplement this concentrated may not be appropriate without medical guidance.
Timing Your Packets
When you drink your LMNT matters almost as much as how many you have. For exercise, the research supports drinking 400 to 600 mL of fluid about two hours before you start, then sipping 150 to 300 mL every 15 to 20 minutes during your workout. Mixing a packet into your pre-workout or intra-workout water covers both hydration and sodium replacement in one step.
For workouts under 90 minutes, water alone is generally sufficient for most people eating a normal diet. Electrolyte supplementation becomes more important during prolonged exercise beyond that threshold, during the first few days of training in hot weather, or when meals aren’t providing enough calories and minerals to offset losses.
If you’re using two packets a day, splitting them works better than doubling up at once. One in the morning and one during or after exercise, for example, gives your body a steadier supply and avoids dumping 2,000 mg of sodium into your system in a short window.
Finding Your Number
There’s no single correct answer because individual sodium needs vary enormously. A 130-pound person who walks for exercise and eats takeout regularly has very different needs than a 200-pound athlete doing two-a-day practices in July heat. Start with one packet on active days and pay attention to how you feel. If you’re on a ketogenic diet or training intensely, try two and see whether your energy, cramping, or mental clarity improves. Scale back if you notice bloating, headaches, or that the taste becomes unpleasant. Your body is surprisingly good at telling you when it has enough.