Baseline Iron+

Iron is the mineral at the center of hemoglobin — the protein in red blood cells that carries oxygen from your lungs to your working muscles. Without adequate iron, your body can't produce enough healthy red blood cells, and your oxygen delivery system starts to fail. The result is textbook iron deficiency: fatigue that doesn't resolve with rest, reduced aerobic capacity, elevated heart rate at submaximal efforts, and the slow, frustrating sense that your body just won't perform the way it should.

But iron doesn't work alone. Red blood cell production is a multi-nutrient process:

• Vitamin C (99 mg) acts as a direct absorption enhancer — it converts non-heme iron into a form your gut can actually take up, significantly increasing bioavailability. Instead of relying on food pairing or timing, the Vitamin C is built into the capsule so absorption is optimized every dose.
• Vitamin B12 (1 mg) is essential for red blood cell maturation. Without adequate B12, the body produces abnormally large, dysfunctional red blood cells that can't carry oxygen efficiently — a condition called megaloblastic anemia that mimics iron deficiency in its symptoms.
• Folate (54 mg) works alongside B12 in DNA synthesis and cell division — the processes that drive red blood cell production in bone marrow. Folate deficiency independently impairs the body's ability to replace the red blood cells that hard training constantly breaks down.

The demand for all four nutrients compounds in populations that train hard. Endurance athletes — particularly runners — lose iron through footstrike hemolysis, where repeated impact physically destroys red blood cells. Sweat losses, gastrointestinal micro-bleeding, and increased red blood cell turnover from heavy training compound the demand. Women have additional losses through menstruation that significantly elevate daily requirements. Athletes training at altitude face yet another factor: the body ramps up red blood cell production to compensate for lower oxygen availability — requiring more iron, B12, and Folate as raw materials.

Gnarly Baseline Iron+ uses a well-tolerated, bioavailable iron form (bisglycinate) paired with its three essential cofactors — building and maintaining the iron stores and red blood cell capacity your body needs to sustain performance, recovery, and energy across weeks, months, and seasons of hard training.