PDF) The Reduction of Heat Production in Exercising Pigeons after L Carnitine Supplementation The main ingredient of Carni Speed is L carnitine. This substance, which is similar to a vitamin, plays a central role in the metabolism of pigeons. With a dosage of 10 ml litre drinking water Rohnfried Carni Speed Concentrate (10 ML Liter of Drinking Water) with L carnitine for Pigeon Fat Metabolism Regeneration and Flying Pleasure (500 ML) : Amazon.com.be: Pet Supplies L Carnitine Magnesium Calcium Complex Pigeon Vitality