All CollectionsCollecting Your SampleCollecting Your SampleStep-by-step instructions for each collection method.RBy Riley1 author·20 articlesGeneral tips for a successful first collectionWhy drying time matters for blood cardsAre walk-in collection sites available?Common finger-prick mistakes and how to avoid themHow to collect a dried blood spot sampleHow to collect a finger-prick blood sampleHow to prepare for your blood collectionHow to use the upper-arm blood collection deviceTips for a successful upper-arm collectionHow to take an at-home breath testHow to collect a hair sampleHow to collect a 4-point cortisol saliva sampleHow to collect a saliva sampleHow to collect a stool sampleHow a multi-day stool collection worksHow to collect a 24-hour urine sampleHow to collect a first morning urine sampleHow to collect a timed urine sampleHow much blood is enough?How to collect a cheek swab (DNA) sample