# Chia Longevity > Medical-grade NAD+ therapy prescribed by US-licensed longevity doctors. Injections and nasal spray delivered to your door. Chia Longevity is a telehealth platform specializing in NAD+ (nicotinamide adenine dinucleotide) therapy for longevity and healthy aging. We provide medical-grade NAD+ injections and nasal spray, prescribed by US-licensed longevity physicians and delivered directly to patients' doors. ## What We Offer - **NAD+ Injections**: Medical-grade NAD+ delivered via subcutaneous injection for near-100% bioavailability - **NAD+ Nasal Spray**: Non-invasive NAD+ delivered through the nasal mucosa for steady daily absorption - **Physician-Supervised**: All prescriptions reviewed and approved by US-licensed longevity doctors - **Home Delivery**: Treatments shipped directly to your door - **HSA/FSA Accepted**: Eligible for health savings and flexible spending accounts - **Flexible Payments**: Klarna and other payment options available ## How It Works 1. Complete a quick online health evaluation (5-minute quiz) 2. A US-licensed longevity physician reviews your case 3. If eligible, your personalized NAD+ treatment is prescribed same-day 4. Medical-grade NAD+ is delivered to your door ## Key Facts About NAD+ - NAD+ is a coenzyme found in every living cell, essential for 500+ enzymatic reactions - NAD+ levels decline by up to 50% by age 40 - NAD+ decline is recognized as a hallmark of biological aging - Supplementation has been shown to raise blood NAD+ levels by 130-150% - Benefits include enhanced mitochondrial function, DNA repair support, reduced inflammation, and sirtuin activation ## Links - Main site: https://longevity.chia.health/nad - Health evaluation quiz: https://longevity.chia.health/nad/quiz - Privacy policy: https://longevity.chia.health/legal/privacy-policy - Terms and conditions: https://longevity.chia.health/legal/terms ## Contact - Phone: 1-866-378-7887 - Website: https://longevity.chia.health - Parent company: https://chia.health