LMNT vs. Relyte: Which Electrolyte Supplement Actually Wins?

Why This Comparison Matters

The electrolyte supplement market is flooded with products that promise peak hydration, but most rely on the same two levers — sugar and marketing — to differentiate themselves. LMNT and Relyte take the opposite approach: both are zero-sugar, science-leaning electrolyte blends aimed at people who want performance without junk.

But “zero sugar, high sodium” isn’t enough to pick a winner. The differences in formulation, sodium philosophy, ingredient sourcing, price, and use-case fit are significant enough to send different buyers in very different directions.

This article breaks down everything a first-time buyer (or a switcher) needs to know.

The Brands at a Glance

	LMNT	Relyte
Founded	2019 (Elemental Labs)	~2020 (Seeking Health)
Primary audience	Keto/low-carb, athletes, endurance	Functional medicine, health-conscious, sensitive users
Flagship form	Stick packs (powder)	Powder tub
Flagship flavors	10+ (Citrus Salt, Watermelon, Mango Chili, etc.)	Unflavored + limited flavored
Sugar	Zero	Zero
Sweetener	Stevia	Stevia (or none in unflavored)
Price per serving	~$1.50	~$0.75–$0.90

Ingredient Deep Dive

Sodium

This is where the philosophies diverge sharply.

LMNT contains 1,000 mg of sodium per stick pack. This is intentionally high — co-founder Rob Wolf built the product around research suggesting that low-carb and ketogenic dieters excrete sodium at a dramatically elevated rate. The argument: most electrolyte products are sodium-timid because they were designed around the old “limit salt” paradigm, which is irrelevant for people in ketosis or training hard.

Relyte contains 810 mg of sodium per serving. Still high relative to mainstream sports drinks (Gatorade has ~270 mg per 20 oz), but ~20% less than LMNT. Seeking Health, the parent company, is founded by Dr. Ben Lynch — a methylation and genetics researcher — and the brand philosophy skews toward “enough, not excessive.” For people with blood pressure sensitivity or who are salt-loading from food already, the lower ceiling matters.

Information gain: Neither product is reckless. At 1,000 mg, LMNT is on the high end of what’s studied in endurance contexts. Relyte’s 810 mg is still a meaningful therapeutic dose. The gap only becomes clinically relevant if you’re stacking multiple servings per day.

Potassium

LMNT: 200 mg per serving.
Relyte: 150 mg per serving.

Both use potassium chloride. Neither comes close to the 2,600–3,400 mg daily adequate intake — they’re supplemental, not total-replacement products. LMNT’s edge here is marginal.

Magnesium

LMNT: 60 mg per serving (as magnesium malate).
Relyte: 50 mg per serving (as magnesium glycinate).

This is a meaningful formulation difference. Magnesium glycinate (Relyte) is widely considered the most bioavailable and gut-friendly form — it’s chelated to glycine, an amino acid. It’s the go-to recommendation for people who experience GI distress from magnesium oxide or citrate.

Magnesium malate (LMNT) is also well-absorbed and has a secondary benefit: malic acid is a Krebs cycle intermediate, so there’s a theoretical (though modest) energy-production angle. It’s also gentler on digestion than cheaper forms.

Winner on magnesium form: Relyte (glycinate is the clinical gold standard for supplementation).
Winner on magnesium dose: LMNT (60 mg vs. 50 mg — minor, but consistent).

Other Ingredients

LMNT: Sodium chloride, potassium chloride, magnesium malate, natural flavors, stevia.

Relyte: Sodium chloride, potassium bicarbonate, magnesium glycinate, malic acid, natural flavors (flavored versions), stevia.

Two differences worth noting:

Relyte uses potassium bicarbonate, not potassium chloride. Bicarbonate acts as a buffer, potentially supporting acid-base balance during intense exercise. This is the same compound used in altitude training and some endurance protocols. It’s a subtle but real formulation advantage for high-output athletes.
Relyte’s unflavored version contains zero additives beyond the three electrolytes — no natural flavors, no stevia, no fillers. For people sensitive to flavor compounds or who stack their electrolytes into other drinks, this is a genuine differentiator.

Taste & Mixability

LMNT is polarizing. The Citrus Salt and Raspberry Salt flavors are widely praised — they taste like a lightly flavored sparkling water rather than a sports drink. The Mango Chili and Chocolate Salt flavors are adventurous and have loyal followings. The salt is detectable (this is by design), and people sensitive to saltiness often find it too intense on first use.

Mixability is excellent — no clumping, dissolves in 8–16 oz cold water in seconds.

Relyte flavored versions are milder. The unflavored version has a very faint mineral taste that most users describe as neutral. It stacks invisibly into smoothies, coffee, or pre-workout drinks. For people who don’t want to taste their electrolytes, this is the practical winner.

Price Comparison

	LMNT	Relyte
Single box (30 sticks)	~$45	N/A
Per serving	~$1.50	~$0.75–$0.90
Subscribe & save	~$1.35/serving	~$0.67/serving
Bulk tub availability	No (stick packs only)	Yes (90 servings/tub)

Relyte is roughly half the cost per serving. For daily users — especially people doing 2 servings/day in endurance training or strict keto — this adds up to $500+/year in savings.

LMNT’s stick packs add a convenience premium: they’re portable, pre-measured, and don’t require a measuring scoop. Relyte’s tub format requires a measuring spoon, which is a minor friction point for travel or gym bags.

Who Should Buy LMNT

Keto/carnivore/low-carb dieters who need the full 1,000 mg sodium hit and want a product built around that specific metabolic context
Endurance athletes (marathoners, cyclists, triathletes) who sweat heavily and lose large volumes of sodium in training lasting 2+ hours
People who want grab-and-go convenience — the stick pack format is genuinely the best in class
Flavor explorers — LMNT’s lineup is broader and more inventive
People who hate measuring things

Who Should Buy Relyte

Magnesium-sensitive users — glycinate is easier on the gut and more bioavailable
Budget-conscious daily users — the savings are real at $0.75/serving vs. $1.50
People who want an unflavored option — Relyte’s plain version is the cleanest formulation on the market in this category
Functional medicine patients — Seeking Health has a strong reputation in the practitioner community; the formulation philosophy is conservative and evidence-based
Athletes interested in buffering — potassium bicarbonate has real, if modest, performance data behind it
People who mix electrolytes into other drinks — the unflavored version disappears completely

Common Myths Debunked

“1,000 mg of sodium per serving is dangerous.”
For healthy adults, no — dietary sodium guidelines of 2,300 mg/day apply to a sedentary baseline. Endurance athletes can safely need 3,000–6,000 mg/day on high-sweat training days. One LMNT pack is not a health risk for the target audience.

“Relyte is underdosed compared to LMNT.”
810 mg of sodium is still ~3× what most sports drinks deliver. The dose difference between LMNT and Relyte is meaningful for extreme sweat scenarios, but for the average person doing 60-minute workouts, Relyte’s sodium is more than adequate.

“Stevia causes insulin spikes.”
The evidence here is weak and inconsistent. At the doses used in electrolyte powders (sub-1g steviol glycosides), no clinically significant insulin response has been demonstrated in peer-reviewed literature. Both products are safe for diabetic and keto users on this point.

“You need electrolytes every day.”
Only if you’re sweating heavily, eating low-carb (which increases electrolyte excretion), or have specific medical conditions. Healthy people eating a balanced diet and exercising moderately get sufficient electrolytes from food. These products are tools, not daily vitamins.

The Verdict

Use Case	Recommended Product
Strict keto / carnivore diet	LMNT
Endurance sports (2+ hour sessions)	LMNT (or alternate with Relyte)
Daily low-intensity hydration	Relyte
Magnesium sensitivity / GI issues	Relyte
Budget-conscious daily use	Relyte
Portability and travel	LMNT
Unflavored / stacking into other drinks	Relyte
Flavor variety and enjoyment	LMNT

Neither product is objectively better. LMNT wins on sodium dose, flavor variety, and convenience format. Relyte wins on cost, magnesium form quality, potassium source, and unflavored versatility.

If you’re a heavy sweater doing long training blocks on a low-carb diet and price isn’t a primary concern, LMNT is purpose-built for you. If you’re a daily user who wants a clean, cost-effective, gut-friendly electrolyte you can mix into anything, Relyte earns the edge.

Sources & Further Reading

Noakes T et al. (2012). “Seminal paper on sodium and fluid replacement in endurance exercise.” British Journal of Sports Medicine.
Shirreffs SM, Sawka MN. “Fluid and electrolyte needs for training, competition, and recovery.” Journal of Sports Sciences, 2011.
Volpe SL. “Magnesium in disease prevention and overall health.” Advances in Nutrition, 2013.
Seeking Health — Relyte product formulation notes (seekinghealth.com)
Elemental Labs — LMNT science page (drinklmnt.com/pages/the-science)

This blog post is for informational purposes only and does not constitute medical advice. Consult a healthcare provider before making significant changes to your supplementation routine, especially if you have hypertension, kidney disease, or other conditions affected by electrolyte intake.