The CBD Buying Guide
Straight answers for the two questions every new CBD shopper has: what should I buy, and where can I buy it safely?
CBD shelves are crowded and labels rarely help. Two bottles can carry the same milligram number and contain very different things, and the same product can be a sound purchase from one seller and a gamble from another. This guide collects everything we have written to help you choose, grouped by the question you are stuck on.
A note on who is writing. Proof is a women-owned CBD company in Sonoma County, so we have an interest in what you buy. We have tried to write every guide here so it holds up for any brand: the checks we suggest are the ones we would want you to run on us. Our chemist co-founder Sarah Miletich and our attorney co-founder Julie Mercer write or review each one.
What to buy
Formats, spectrum and strength: how to narrow the shelf down to one product.
8 guides- Your first CBD product A starter plan for first-time buyers.
- Which CBD product is right for you? Goals and routines, matched to formats.
- Oil vs gummies vs capsules vs topicals Every format compared on dosing, onset and price.
- Full-spectrum vs broad-spectrum What each label means, including THC content.
- Roll-on vs cream vs patch Three topical formats compared.
- Comfort Drops vs Sleepy Drops Which Proof tincture fits which part of the day.
- CBD tincture for sleep How to pick an evening formula.
- Best THC-free CBD oils Our ranked list, with the criteria we used.
Labels and lab reports
How to check that a product contains what it says, and nothing it should not.
9 guides- How to choose a quality CBD product Our complete buyer's checklist.
- CBD potency explained mg per bottle, per ml and per serving.
- What 1,000 mg means on a topical Reading strength on a roll-on label.
- How to read a CBD Certificate of Analysis A real report, line by line.
- Biggest CBD label red flags What to look at twice before you buy.
- Hemp oil vs CBD oil vs hemp seed oil Why "hemp oil" can mean almost no CBD.
- Why product testing matters What third-party testing protects you from.
- Manufacturing standards: GMP and organic What the seals on a label do and do not mean.
- Proof lab reports Our current Certificates of Analysis.
Price, subscriptions and guarantees
What a fair price looks like, and what you are agreeing to at checkout.
5 guides- Why CBD costs what it does Price per mg, and what drives it.
- Subscription or one-time purchase? When a subscription makes sense, and what to check.
- Money-back guarantees: what to look for Fees, limits and fine print, compared.
- Proof Subscribe & Save Our subscription terms and pricing.
- Proof bundles Two-product bundles at a set price.
Where to buy
Online, in a store, or on a marketplace: what each channel usually sells and how to check it.
7 guides- Where to buy CBD Every channel compared, with a risk check for each.
- Is the CBD on Amazon real? What marketplace "hemp oil" listings usually contain.
- Gas station and smoke shop CBD What to check at the counter before you buy.
- How to buy CBD online safely Fake ads, free-trial traps and how to vet a store.
- Can CBD ship to my state? Federal rules, mailing rules and state checks.
- Questions to ask a CBD brand Ten questions any good seller should answer.
- CBD brands made in California Our list, and how we checked each one.
Buying for someone else, or for a pet
Gifts, parents, partners and animals: the extra checks that matter.
8 guides- Buying CBD for someone else What to ask before you buy for a parent or partner.
- CBD for older adults Medications, drowsiness and what to ask a pharmacist.
- Where to buy CBD for pets Pet store, vet or online: what each offers.
- Buying CBD for your pet Five things to check before you shop.
- Can pets have human CBD oil? Why pet-specific products matter.
- How to read a pet CBD lab report The four lines that matter for animals.
- Best CBD oil for dogs Our ranked list for dog owners.
- CBD for animals: start here Our full animal library.
Before you buy: safety and the law
Read these first if you take medication, get drug tested, or plan to travel.
5 guides- CBD safety: questions to ask first Who should be careful, and why.
- CBD and prescription medication How CBD can interact with other drugs.
- Does CBD show up on a drug test? Why THC, not CBD, is the risk.
- The federal hemp law changes in late 2026 What changes on 12 November and 11 December 2026.
- Traveling with CBD TSA, state lines and strict countries.
Ranked lists
Our Best Of lists. On ranked lists we put our own product first and say so.
5 guidesShop Proof
Every Proof product has a lab report posted on our site, free shipping over $60 and a 30-day money-back guarantee (read the terms in our guarantee guide above).
These statements have not been evaluated by the Food and Drug Administration. Proof products are not intended to diagnose, treat, cure, or prevent any disease.