Supplements for Runners — Running Nutrition | 6AM Run

Mile 19 is where marathon plans go to die. Not mile 26 — mile 19, when the glycogen runs low, the legs start negotiating, and whatever you got wrong at breakfast, at the start line, and at mile 12 all shows up at once to collect.

I'm Hami — founder of 6AM Run, and a runner who has bonked in enough races to learn this the slow way. Most "marathon supplement" advice is either a gel company's shopping list or a gym brand pretending 26.2 is a long leg day. This is neither. It's the simple system I actually use, organized the only way that makes sense on race day: before, during, and after.

If you want the full breakdown of every supplement category for runners, start with our complete guide: Supplements for Runners: The Complete Guide. This page is the marathon-specific version — training, race week, and the day itself.

The rule before every rule: nothing new on race day

Say it until it's boring: nothing new on race day. Every supplement below gets tested in training first — your long runs are the laboratory. The gut can be trained like everything else (here's how: how to train your gut for a marathon), and supplements that have never caused a problem at mile 16 of a long run are the only ones allowed anywhere near a start line.

And the base is still food. A supplement plan built on top of a skipped carb load is decoration — get the 3-day marathon carb-loading plan right first, then layer this on top.

BEFORE: the start-line stack

What you're solving: waking up ready, with energy on board and amino acids already circulating — without a heavy stomach bouncing through the first 10K.

• Caffeine, timed right. The most proven legal performance aid in endurance sport. You want it 30–60 minutes before the gun, not with your 4 AM alarm in a panic. Moderate and clean beats a gym pre-workout's stimulant bomb — jitters and a heart-rate spike at mile 2 are not a strategy.
• An all-in-one instead of a handful of bottles. My race-morning scoop is MARATHON: one scoop in 8–12 oz of cold water, 15–30 minutes before I run. It's built for exactly this job — green tea extract for clean, sustained energy without the crash, 12 essential amino acids including BCAAs already on board before the damage starts, and electrolytes in the same glass. $59.99 for 40 servings, so one tub covers a full training block plus race day.
• Want a sharper kick for a goal race? That's what SPRINT exists for — fast, clean pre-run energy and focus for the days that matter most. Some runners stack it on race morning; test it on a hard long run first (see the rule above).
• Race week is part of "before." The last 3–4 days aren't about one magic scoop — they're about carbs up, hydration steady, electrolytes topped off. The full timeline is in our race week hydration plan.

DURING: fuel the miles, not the mile you're on

What you're solving: after 60–75 minutes, you're burning through glycogen and sweating out sodium faster than water alone can fix. The wall isn't weakness — it's an empty tank.

• Carbs on a schedule, not on a feeling. By the time you feel flat, you're already behind. Set the intake rhythm in training and hold it when the race gets loud.
• Gummies travel better than you think. MARATHON 2.0 Gummies are the format a lot of our runners switch to mid-race: easy to portion, easy on a tired stomach, no mixing, no sticky gel explosion in your pocket. Plenty of runners carry both — powder in the bottle early, gummies late when chewing something real feels better than drinking another sweet sip.
• Electrolytes aren't optional in the second half. Cramping, fading focus, that "my legs just stopped listening" feeling — sweat takes sodium and potassium with it, and water alone dilutes what's left. HYDRABLAST is our electrolytes-plus-hydration mix, built for exactly the miles where plain water stops being enough. Sip it through the middle miles, not in one desperate gulp at mile 22.
• The gut rule still applies. If a format bothers your stomach at mile 14 of a long run, believe it. Race day amplifies everything — it forgives nothing.

AFTER: recovery starts at the finish line

What you're solving: you just spent 26.2 miles tearing down muscle. The next 24–48 hours decide whether you absorb the training or just survive it — and whether you're running again this week or limping into next month.

• Protein + aminos, fast. The finish-line window matters: get protein and amino acids in while your body is primed to use them. FINISHLINE is our post-run formula — built for the hour after, to start the rebuild before the soreness even sets in.
• Keep the electrolytes coming. You finish a marathon still dehydrated, whatever you drank out there. Hydration is a rest-of-the-day project, not a finish-chute bottle.
• The days after are part of the plan. Easy movement, real food, sleep — and the same daily support stack you'd use in training. Recovery isn't a product you take once; it's the 48 hours you manage on purpose.

That's the whole system. Before: energy and aminos on board. During: carbs and electrolytes on schedule. After: rebuild immediately. It's the same Before / During / After ritual behind every product we make — and it's why runners who try it tend to stay: 50,000+ five-star reviews and counting, and every order covered by our 125% money-back guarantee — improve your running, or we pay you.

First tub? Code FINISH35 takes 35% off your MARATHON (one use per customer), and orders over $55 after discounts ship free.

Your turn: what's the one thing you ALWAYS take on marathon morning — and the one thing you'd never touch again? Tell me in the comments; the never-again stories are how the rest of us learn.

— Hami, CEO, 6AM Run