Creatine for Runners: Dose, Timing, Vegan Facts

Creatine monohydrate is a legal, heavily studied supplement that raises phosphocreatine stores and can help repeated high-intensity efforts. For marathon runners the honest pitch is narrower: it may support hard workouts, hill repeats, and strength work in a training block. It is not a substitute for 8–12 g/kg carbohydrate in the last 36–48 hours (Burke et al., 2011; ACSM 2016) or for practised 30–90 g/h in-race carbohydrate (Jeukendrup, 2014).

Plant-based runners often have lower baseline creatine stores because meat and fish are dietary creatine sources. That is a reason some vegan athletes choose a monohydrate supplement. It is not a reason to invent a larger dose than the literature uses.

The ISSN position stand (Kreider et al., 2017) is the citation for dose and safety language below. This page does not invent a sports dietitian name, a Certified Vegan tub, or a guaranteed marathon PR.

What creatine does (and does not) do for endurance

Creatine helps regenerate ATP during short, intense contractions. Marathons are limited more by glycogen, heat, and GI than by a single 10-second phosphagen burst. Possible training-block uses:

• Faster recovery between repeats
• Better quality on strides, hills, and gym work that support running economy
• A small body-mass increase from water in muscle — sometimes useful, sometimes annoying in taper

Not claimed here: creatine as treatment for disease, creatine as a carb-load replacement, creatine as prevention of hitting the wall, or a specific minutes-faster marathon time.

Dose and timing (published, not personalized)

| Approach | Amount | Notes | | --- | --- | --- | | Daily maintenance | ~3–5 g/day creatine monohydrate | Largest evidence base; take every day, including rest days | | Optional load | ~20 g/day split into ~4 servings for 5–7 days, then 3–5 g/day | Saturates faster; more GI complaints for some people | | Race week | Do not start a new load 7–10 days out | Water weight and GI are the wrong surprises |

Timing is secondary to consistency. Take it with food you already tolerate. Do not pour a new flavored creatine into the race-morning bottle. Do not stack it with an untested beet shot and a new caffeinated gel in the same week.

Caffeine still uses the 3–6 mg/kg band on this site (coffee before a marathon). Older “caffeine cancels creatine” headlines are not a reason to quit coffee in taper.

Vegan status and product honesty

Most creatine monohydrate is synthesized (often from sarcosine and cyanamide in industrial processes) and does not contain animal tissue. That is why it is a common vegan-athlete supplement.

That is not automatic Certified Vegan. Capsules may use gelatin. Gummies may use honey or gelatin. “Plant-based” front labels are marketing. We do not list a creatine SKU in the fuel catalog; verify the tub the same way you verify a gel: ingredients, last-updated label, no invented trademark.

Creatine is not in the plantbaes.net foods table. Grams above are published supplement ranges, not calculated meal-builder outputs. Label them that way if you discuss them next to rice-and-tofu math.

How it fits a plant-based training week vs race week

Training block: creatine can sit next to normal high-fiber plates and protein work. Hydrate as you usually would; intramuscular water is not a license to overdrink (how much water during a marathon).

Race week: keep carb loading and the ~15 g fiber/day heuristic. If you are already on 3–5 g/day and tolerate it, continuing is reasonable. Starting a 20 g/day load while you are also pushing 700 g of carbohydrate (70 kg at 10 g/kg) is how people blame “vegan fueling” for a bloated taper.

Race morning: practised breakfast and practised caffeine only. Creatine is not an on-course gel.

Who should skip self-experimentation

Educational flags: diagnosed kidney disease, pregnancy, breastfeeding, or clinician advice to avoid creatine. GI distress on loading is a reason to drop to 3 g/day or stop — not to switch to an unstudied “buffered” marketing form as a medical workaround.

Spend money on status-checked carbohydrate first. The gels catalog and race fuel planner change marathon outcomes more than a new tub.