Making nicotine-free homemade e-liquid (vape juice) is possible and relatively simple, but it carries risks if you use the wrong ingredients or poor technique. Commercial e-liquids undergo quality control; DIY does not. Only use materials specifically intended for vaping, and understand that inhaling any aerosol is not risk-free. Essential Ingredients (Nicotine-Free) Propylene glycol (PG) — USP or pharmaceutical/food grade. Thinner, carries flavor well, contributes to throat sensation. Vegetable glycerin (VG) — USP or food grade. Thicker, produces more vapor, slightly sweet. Flavor concentrates — Only those made specifically for e-liquid/vaping (usually PG-based). Follow the manufacturer’s recommended percentage (often 5–20% total, depending on the concentrate strength and type: fruit tends lower, dessert higher). Do not use: Essential oils Baking extracts or food flavorings from the grocery store Oils of any kind (can cause serious lung issues when heated and inhaled) Random chemicals or non-USP grade bases Basic Equipment Clean, empty e-liquid bottles (PET plastic or glass, with child-resistant caps if possible) Syringes or graduated pipettes for accurate volume measurement Optional but better: digital scale accurate to 0.01 g (mixing by weight is more consistent) Gloves for hygiene Clean workspace Simple Step-by-Step Process Decide your batch size and ratio Common starting ratios: 50/50 PG/VG — balanced flavor and vapor, works in most devices 30 PG / 70 VG — more vapor, smoother (better for sub-ohm) Higher VG can be thicker and may wick poorly in some pods. Calculate amounts Use a free online e-liquid calculator (search “e-liquid calculator”). Enter target volume, desired PG/VG ratio, and flavor percentage. For nicotine-free, set nicotine to 0.Example for a 30 ml batch at 50/50 with 15% flavor: Flavor concentrate: ~4.5 ml PG: ~12.75 ml (adjusted for the PG already in most concentrates) VG: ~12.75 ml (Actual numbers come from the calculator — do not eyeball.) Mix Add the base liquids (PG then VG, or vice versa) into a clean bottle. Add the flavor concentrate(s). Cap tightly and shake vigorously for 1–2 minutes until fully combined. Steep Most mixes improve with time. Store in a cool, dark place and shake once or twice daily. Simple fruit flavors may be ready in a few days; complex dessert or creamy flavors often need 1–2 weeks or longer. Label and store Write the date, ratio, flavors, and “0 mg nicotine.” Keep tightly capped, away from heat, light, children, and pets. Properly stored DIY juice typically lasts 1–2 years, though flavor can fade. Important Safety Notes Use only USP/food-grade PG and VG and vaping-specific flavors. Contaminated or wrong-grade materials increase risk. Work cleanly to avoid bacterial contamination. Start with small test batches so you can adjust ratios or flavors without waste. Homemade liquid has no independent testing for purity, heavy metals, or harmful byproducts that can form when heated. Even nicotine-free vapor can contain thermal degradation products (e.g., from PG/VG) and flavor-related compounds. Vaping is not harmless. Local laws may restrict sale or certain ingredients — this is for personal use only. If you want the easiest and safest route, many suppliers sell pre-made nicotine-free base (already mixed PG/VG) and one-shot flavor concentrates designed for simple mixing. Always prioritize verified suppliers of USP-grade materials over random sources. This is a practical overview based on established DIY practices.