For years, I bought premium hydration mixes, trusting that athlete endorsements meant "proprietary science."
They didn’t always work. In fact, when I first started doing long endurance events, they were actually hurting me. It took me years to find a brand I could trust to get me through a 12-hour grind—and even then, it wasn't perfect.
Then I looked at the label.
I realized most "premium" brands used the exact same cheap ingredients, often loaded with sugar or artificial flavors I didn't want.
As a die-hard DIYer and a regular guy who just wants to stay hydrated, I decided to do my own research. The solution I found was simple: Build it myself.
The results were immediate:
Total Control: I created a mix that supported my physiology, not a generic formula for the masses.
Zero Junk: No sugar, no artificial sweeteners.
Massive Savings: By buying the raw ingredients, I cut my costs by 90%. For a daily user, that’s a savings of nearly $50 a month.
Here’s how I did it.
The Warning
Before we start mixing, we need to address the chemistry. This formula relies on Potassium Chloride. In a hospital setting, potassium is a high-alert medication. In your kitchen, it deserves respect.
⚠️ Medical Disclaimer:
The "Banana" Rule: One serving of this mix contains roughly 350–400mg of potassium. For context, a medium banana contains ~420mg. If you can safely eat a banana, this mix is generally safe for you.
The Warning: However, if you have kidney disease, take ACE inhibitors, or strictly monitor potassium intake, do not use this mix without consulting your doctor. Healthy kidneys filter excess potassium easily; compromised kidneys do not.
The Engineering Logic
Why go through the trouble of mixing this yourself instead of just taking a salt pill?
1. Solving "Involuntary Dehydration"
Have you ever chugged water during a hot ride but still had to pee constantly? That’s the "Mixing Lag."
When you drop a salt pill into your stomach and chase it with plain water, the water rushes through your kidneys and out your bladder before the pill dissolves. You are rinsing your kidneys while your muscles starve for fluid. By pre-dissolving the powder in your bottle, the water is "anchored" to the electrolytes. It bypasses the bladder and goes straight to your blood volume.
2. The "No-Sugar" Decoupling
Many sports drinks include sugar for energy. That sugar spikes your insulin (shutting down fat burning) and can cause "gut rot" after 4 hours. By removing the sugar, we decouple Hydration (Cooling) from Fueling (Energy). You can drink as much coolant as you need without force-feeding yourself liquid calories.
3. The Ratio Rule: Understanding Osmolality
While many retail drink mixes prioritize taste to appeal to a mass audience, this recipe prioritizes physiology. It leverages the fluid mechanics principles outlined by the American College of Sports Medicine to ensure optimal hydration, not just flavor. The effectiveness of this mix depends entirely on Osmolality—the concentration of particles in the fluid compared to the concentration of particles in your blood.
The Target (Isotonic): When you mix one tube into 16–24 oz of water, you create a solution that is roughly Isotonic. This means it has the same osmotic pressure as your blood. Your body recognizes it immediately and absorbs it effortlessly.
The Risk (Hypertonic): If you were to mix this powder into a small "shot" of water (like 4 oz), you would create a concentrated slurry that actually pulls water out of your body and into your intestines. This causes dehydration—the exact opposite of what we want.
The Golden Rule: Always mix one tube with at least 16 oz of water.
The Decision Matrix: When to Use Which?
I use two different formulas depending on the workload. This table shows exactly when I switch from the "Mild" (Daily) mix to the "Race" (High Sodium) mix.
Short Duration(< 90 Mins) | Medium Duration(90 Mins – 3 Hrs) | Long Duration / Heat(3 Hrs + or >85°F) | |
Low Intensity (Zone 1-2, Office, Travel) | MILD | MILD | MILD |
High Intensity (Zone 3-5, Race Pace) | MILD | RACE | RACE |
At Home: I typically use the Mild mix in a standard 16 oz glass of water to stay topped off while working. I mix this one to taste, often diluting it a bit so it doesn’t taste too salty.
On the Bike: I carry the tubes of dry powder in my jersey. I dump them into my water bottle (20–24 oz) at refill stops.
The Recipes
Note: See my the link to “Shop My Gear” at the bottom of the webpage to see what ingredients and containers I purchased. You will also need a kitchen type food scale. I placed a link to one of those as well in case you don’t have one.
I pre-mix these dry in batches of 30 using plastic centrifuge tubes. This allows me to grab-and-go without measuring every single day.
Formula 1: The "Mild" Mix (Daily Maintenance)
Use for: Office days, travel, and rides under 90 minutes.
Ingredient | Role | Per Tube (Single) | Batch of 30 (Dry Bowl Mix) |
Pink Himalayan Salt | Sodium | 1.5 g | 45 g |
Potassium Chloride | Potassium | 0.7 g | 21 g |
Magnesium Malate | Muscle Function | 1.0 g | 30 g |
Crystallized Lime | Flavor | 1.6 g | 48 g |
Formula 2: The "Race" Mix (Heavy Sweat)
Use for: High intensity / extreme heat rides over 90 minutes.
Note: This has double the sodium. Mark these tube caps with a Red Sharpie or use different color tube.
Ingredient | Role | Per Tube (Single) | Batch of 30 (Dry Bowl Mix) |
Pink Himalayan Salt | Sodium | 3.0 g | 90 g |
Potassium Chloride | Potassium | 0.8 g | 24 g |
Magnesium Malate | Muscle Function | 0.5 g | 15 g |
Crystallized Lime | Flavor | 2.5 g | 75 g |
The Hardware & Sourcing
You don't need a lab, but having the right “ prep-system” makes this a habit rather than a chore. Here is exactly what I use.
1. The Vessels: 5ml or 10ml Centrifuge Tubes
Forget Ziploc bags—they can leak and are hard to pour into a narrow bike bottle. I use plastic lab tubes to hold the dry powder.
Note: The recipe above creates about 5g–6g of powder. If you use 5ml tubes (like I did in the video), the mild mix will fill most of the bottle. I also purchased 10ml tubes for the race mix. They are a different color so I didn’t need to mark them and can tell the difference.
As seen in my setup: [5ml Flat Bottom Tubes with Orange Caps].
2. The Batch Station: Tube Rack
Trying to fill 30 tiny tubes standing on a table is a domino disaster waiting to happen. A cheap plastic lab rack holds them steady while you spoon in the dry mix.
3. The Ingredients
Potassium Chloride: Pure powder. WARNING: Store this away from your kitchen table salt to avoid mix-ups.
Magnesium Malate: Chosen because it is easier on the stomach than Magnesium Citrate.
Sea Salt: See note.
Crystallized Lime: "True Lime" or organic equivalent. This is actual fruit, not artificial flavor.
A Note on the Salt:
In the video, you saw me use Wild Foods Pink Himalayan Salt. While excellent quality, it is pricey (~$18/lb). Since salt is the main ingredient by weight, you can switch to Redmond Real Salt or a bulk Sherpa Pink Salt to bring the cost down even further without losing the trace minerals.
Instructions:
Mix the "Batch of 30" weights thoroughly in a dry bowl.
Set up your empty tubes in the rack.
Scoop roughly 1 heaping teaspoon of the dry mix into each tube.
Cap, label, and store in your pantry.
Usage: Dump one tube of powder into your glass (16 oz +) or water bottle (24 oz). Mix well. Drink.
I’d love to hear how this 10-cent recipe is working for your specific training needs—drop your results below!
Also, if you have general questions about gear, performance longevity, or what I’m working on next, head over to our new Community Forum where we can dive deeper into these topics as a group.