The fastest way to shop safely is to check three things before anything else: the product type, the potency numbers (THC or CBD percentage for flower and concentrates, milligrams per serving for edibles), and whether a scannable Certificate of Analysis is attached. Once those check out, the safety default is simple: start with a low dose, especially with edibles, and wait out the full onset window before taking more.
TL;DR:
- Always verify a product’s Certificate of Analysis through the QR code before purchasing to ensure lab-tested safety and accurate potency.
- Start with a low dose of 1 to 2.5 milligrams of THC for edibles or a cautious amount based on your tolerance, and wait at least two hours before redosing.
- Smoking or vaping effects typically occur within 5 to 10 minutes, while edibles take 30 minutes to 2 hours to kick in, making timing critical to avoid overconsumption.
- THC percentage in flower or concentrates indicates potency per gram, but the actual dose depends on the milligrams per serving listed on edibles and concentrates.
- Red flags include missing or mismatched COA lot numbers, and products reporting only THC without total cannabinoid information should be approached with caution.
Table of Contents
- What you’ll see on a dispensary menu: product types and common labels
- Potency and dosing: how to read THC and CBD numbers
- Onset and duration by delivery method
- Lab tests, COAs, and packaging: what to check before you buy
- Quick checklist: choosing a safe product on the spot
- How Say Less approaches menu transparency and safety
- Shopping safely with Say Less
- Sources
- FAQ
What you’ll see on a dispensary menu: product types and common labels
Every dispensary menu sorts products into a handful of categories, and knowing what each one means changes how you shop. Flower is the dried plant, sold by weight and usually labeled with a THC percentage. Pre-rolls are flower rolled into a joint, sometimes infused with concentrate for extra strength. Vapes and cartridges heat oil into inhalable vapor, often listing THC percentage and a terpene profile. Edibles are ingestible products, gummies, chocolates, drinks, and they’re the category where mg per serving matters most. Concentrates (wax, shatter, live rosin, diamonds) are potency-dense extracts meant for dabbing or mixing into flower. Tinctures are liquid extracts taken under the tongue or added to food or drink.
Strain names and tags like indica, sativa, or hybrid show up everywhere on menus, but they’re rougher guides than most shoppers assume. They hint at a plant’s growing lineage more than they guarantee a specific effect, since the actual experience depends heavily on the cannabinoid and terpene mix in that particular batch.
The fields that actually matter for safety and effect:
- THC percentage on flower and concentrates, which tells you strength per gram, not per dose.
- Milligrams per serving and total servings per package on edibles, the number that actually predicts your experience.
- Net weight, lot number, and a QR code or link to the product’s Certificate of Analysis.
If you want help matching a product type to the effect you’re after, a guide to choosing cannabis products that fit you breaks that down further.
Potency and dosing: how to read THC and CBD numbers
A THC percentage on a flower label describes concentration, not a dose you can compare across product types. A gram of 24% THC flower and a 10 mg edible aren’t measured the same way, so don’t try to eyeball a conversion between them. For edibles, the number that matters is milligrams per serving, printed on the label and, ideally, demarcated directly on the product itself.
Starting-dose guidance that holds up across most adults:
- New or infrequent users should start around 1 to 2.5 milligrams of THC and wait before deciding whether to take more.
- Adults with some tolerance can consider 5 to 10 milligrams as a cautious starting point.
- Anyone unsure where they fall should default to the lower end and treat the first dose as a test, not a full serving.
A microdosing guide for beginners and a more detailed edible dosage chart both walk through this in more granular steps.
Multi-serving packages are where people get into trouble. A single package might list “100 mg THC” as its total content while containing ten separate 10 mg servings, and it’s easy to eat the whole thing without noticing the split. Colorado’s public health surveillance on edible-related poisonings led regulators to cap edible servings at 10 milligrams per serving with clearer demarcation after multi-dose products were repeatedly tied to accidental overconsumption.
Pro Tip: Scan the product’s COA before you eat an edible, not after, so you know the tested potency matches the label.
Onset and duration by delivery method
The menu tells you what a product is, not how long it takes to feel it or how long it lasts, and that gap is where most bad experiences happen. Smoked and vaped cannabis hits fast: effects typically start within 5 to 10 minutes, peak within 30 to 60 minutes, and taper off over a few hours. Edibles work on an entirely different clock. The CDC notes that edible effects typically show up between 30 minutes and 2 hours after ingestion, with peak plasma levels arriving well after smoked or vaped THC would have already peaked.
That delay is exactly why edibles cause more accidental overconsumption than other formats: people feel nothing at 20 minutes, assume the dose was too low, and take more before the first dose has even kicked in.
Practical waiting intervals to hold yourself to:
- Smoked or vaped: wait at least 30 to 60 minutes before considering another dose.
- Edibles: wait a full 2 hours before taking more, even if you feel nothing yet.
- Tinctures: effects often land between the two, so treat them with edible-level patience until you know your response.
A closer look at how long edibles actually last covers the full onset-to-comedown timeline if you want the details.
Lab tests, COAs, and packaging: what to check before you buy
A Certificate of Analysis is the single best safety document tied to any cannabis product, and reading it takes less than a minute once you know what’s on it. A COA typically reports the potency breakdown (THC, CBD, and often minor cannabinoids), plus pass or fail results for pesticides, heavy metals, residual solvents, and microbial contaminants like mold or bacteria. Each of those matters because cannabis is not FDA-regulated the way food or medicine is, and state lab testing and COAs are the main consumer protection available for dispensary products.
Regulatory packaging guidance in New York’s Part 128 rules requires visible warnings, lot numbers, and a scannable QR code linking straight to that product’s COA on retail packaging. That QR code is your fastest verification tool: scan it in the store or on the menu page, confirm the lot number on the code matches the lot number on the package, and check that the potency listed on the COA is close to what’s printed on the label.
One in a very small set of red flags that should stop a purchase outright: a package with no COA link at all, or a lot number on the label that doesn’t match the one pulled up online.
- No COA available or a broken QR code.
- Lot number mismatch between package and COA.
- A potency listed only as “THC” with no mention of delta-8 or total cannabinoid content, since products reporting only delta-9 THC can understate total psychoactive potential if other cannabinoids are present.
A full walkthrough lives in this 60-second COA verification guide.
Quick checklist: choosing a safe product on the spot
Use this order every time, whether you’re browsing online or standing at the counter.
- Confirm you’re buying from a licensed retailer and have valid ID ready.
- Pick the product type that matches how fast you want it to work and how long you want it to last.
- Check milligrams per serving on edibles, or THC percentage on flower and concentrates.
- Scan the QR code and confirm the COA lot number matches the package.
- Start with a low dose and wait the full onset window before taking more.
- Store the product away from children and pets, sealed, at room temperature.
If you’re unsure, ask a budtender three things: what’s the actual dose in this product, how long until I feel it, and can you pull up the COA right now. A staffer who can’t answer the third question is a sign to look elsewhere.
Pro Tip: Treat “I don’t feel anything yet” as information, not permission to redone early.
How Say Less approaches menu transparency and safety
The menu is curated around lab-tested inventory, including brands with reputable potency and safety testing. Every product available for pickup or delivery carries a COA-first standard, with staff to discuss dosing, onset expectations, and lab results rather than focus on sales. If a label or COA raises a question, ask in store or through the site before you buy.
— Jake
Shopping safely with Say Less
Lab-tested flower, pre-rolls, vapes, edibles, concentrates, and tinctures from curated brands are stocked, with same-day delivery and pickup available. Products on the menu carry COA access, enabling verification of potency and safety before purchase.
| Step | What it covers |
|---|---|
| Check product type | Matches desired onset and duration |
| Check potency label | THC/CBD percentage or mg per serving |
| Scan COA | Confirms lab-tested safety and potency |
Run through the checklist above, and check with a healthcare provider before combining cannabis with any medication. Browse the current menu when you’re ready to order.
Sources
This article draws on CDC guidance on cannabis poisoning and edible dosing, MMWR surveillance data on edible-related harms, and New York’s Part 128 packaging and labeling guidance, all linked above where their findings apply.
This article is general information, not a substitute for advice from a qualified doctor. Consult a qualified healthcare professional about your own circumstances before acting on anything here.
- Notes from the field: marijuana edible-related poisoning surveillance and policy response | MMWR
- Part 128: Packaging & Labeling Guidance | Office of Cannabis Management
- CDC Health Advisory: Delta-8 THC concerns
FAQ
What’s the safest way to start with an edible?
Start with 1 to 2.5 milligrams of THC if you’re new, or 5 to 10 milligrams if you have some tolerance, then wait a full 2 hours before considering more. Edible effects typically take 30 minutes to 2 hours to appear, so redosing early is the most common cause of overconsumption.
How do I check a product’s Certificate of Analysis?
Scan the QR code printed on the package or pull it up from the menu listing, then confirm the lot number matches and that the potency and contaminant panels look clean. New York’s Part 128 packaging guidance requires that QR code link on retail packaging specifically for this purpose.
Why do edibles take longer to work than smoking or vaping?
Edibles have to pass through digestion before THC reaches your bloodstream, which delays effects compared to smoking or vaping, where THC enters through the lungs almost immediately. That delay is why edible onset runs 30 minutes to 2 hours while smoked or vaped effects show up within 5 to 10 minutes.
What should I do if a package has no visible COA?
Treat it as a red flag and ask staff to produce the Certificate of Analysis before you buy, since a missing or mismatched COA means potency and contaminant testing can’t be verified. At Say Less, every product on the menu is lab-tested with COA access built into the listing.
Does a high THC percentage always mean stronger effects?
Not necessarily, since THC percentage measures concentration in flower or concentrate, not the dose you actually consume, and factors like tolerance and delivery method change the experience. Checking mg per serving on edibles and starting low regardless of percentage is a more reliable safety approach than chasing the highest number on the menu.