Gnarly Nutrition Baseline Iron

Mile 18 and you're hitting a wall you've never hit before. Your long runs feel harder than they should. Recovery takes twice as long as last season. You're doing everything right with training, but something's off. Here's what most endurance athletes don't realize: you're losing iron faster than you can replace it, and it's killing your performance.

Gnarly Baseline Iron is the endurance athlete's solution to the iron deficiency crisis that's sabotaging up to 50% of female and 30% of male endurance athletes.

Why Endurance Athletes Hemorrhage Iron Every footstrike breaks down red blood cells in your feet (foot-strike hemolysis). You lose iron through sweat during those 3-hour rides. Long runs cause micro-bleeding in your GI tract. And here's the kicker: the inflammation from hard training triggers hepcidin, a hormone that actively blocks your body from absorbing iron for 3-6 hours after workouts. You're training hard to get faster, but your body's natural response to that training is making you iron deficient. Runners, cyclists, and triathletes need 1.5x more iron than sedentary people – and that jumps to 1.8x if you're plant-based.

Iron Bisglycinate – The Form That Won't Wreck Your Gut 25mg of iron bisglycinate delivers the most bioavailable non-heme iron available. Unlike the ferrous sulfate that leaves you constipated and nauseous (great for a long run, right?), bisglycinate is chelated with glycine, an amino acid your gut absorbs efficiently. You get the iron boost without the stomach chaos that derails training.

Vitamin C Maximizes Absorption During Your Iron Window 15mg of vitamin C is included because timing matters. Your body can only absorb iron effectively when inflammation is low – which means first thing in the morning or 6+ hours after hard training. The vitamin C amplifies absorption during that narrow window, ensuring more of what you take actually makes it into your bloodstream.

B12 and Folate – The Red Blood Cell Support Team 50mcg of methylcobalamin (active B12) and 400mcg of L-5-MTHF folate work alongside iron to produce healthy red blood cells. If you're plant-based, you're statistically likely to be deficient in B12, which causes its own form of anemia. This formula covers all the bases.

Daily Supplementation: Take 1 capsule daily with a small snack. Avoid calcium (dairy, fortified foods), coffee, and tea within 2 hours – they block absorption.

Optimal Timing: First thing in the morning on rest days, or 6+ hours after hard training when hepcidin levels drop and your absorption window opens.

Testing Protocol: Get ferritin levels tested every 8-12 weeks during heavy training blocks. Target 35-50 ng/mL minimum for endurance athletes (higher than the standard cutoff).

NCAA Division 1 track athletes, marathon runners, cyclists logging 200+ miles per week, and plant-based ultra-runners rely on this formula. The clean ingredient list – iron bisglycinate, B12, folate, vitamin C, rice bran, and vegetarian capsules – means no fillers interfering with absorption.

This isn't just another iron supplement. This is your performance baseline handled so you can actually absorb the hard training you're putting in.