Per milligram of CBD, these four broad spectrum oils cost between 0.50 cents and 6.50 cents, a thirteenfold spread. Canna River's 120 mL bottles are the cheapest per milligram, cbdMD sells the most concentrated single serving, Joy Organics is the only one whose every ingredient is USDA certified organic, and Medterra's single strength costs the most per milligram at full price. cbdMD, Medterra and Joy Organics are the three brands ChatGPT named when we asked it for the best broad spectrum CBD oil in October 2026. Every number below comes from each brand's own product page, read on October 25, 2026.
Why compare per milligram, not per bottle
These bottles hold anywhere from 900 mg to 20,000 mg of CBD, so the shelf price tells you almost nothing. Dividing the price by the milligrams on the label gives a number you can compare across any two brands. Serving sizes are not a fair yardstick either: cbdMD's 1 mL serving holds 50 to 250 mg depending on strength, while Medterra's holds 33 mg. Our guide to reading a CBD label walks through the arithmetic.
The four oils by the numbers
One-time, single-bottle list prices, before subscriptions, codes or multi-packs.
| Brand and bottle | Total CBD | Per serving | Price | Cents per mg |
|---|---|---|---|---|
| Canna River Ultra Classic, 120 mL | 20,000 mg | 166.7 mg per mL | $100.00 | 0.50¢ |
| Canna River Classic, 120 mL | 12,000 mg | 100 mg per mL | $80.00 | 0.67¢ |
| Canna River Classic, 60 mL | 6,000 mg | 100 mg per mL | $60.00 | 1.00¢ |
| Canna River Classic, 30 mL | 3,000 mg | 100 mg per mL | $40.00 | 1.33¢ |
| Canna River Classic, 15 mL | 1,500 mg | 100 mg per mL | $20.00 | 1.33¢ |
| cbdMD Broad Spectrum, 7500 mg | 7,500 mg | 250 mg per 1 mL | $134.99 | 1.80¢ |
| cbdMD Broad Spectrum, 6000 mg | 6,000 mg | 200 mg per 1 mL | $114.99 | 1.92¢ |
| cbdMD Broad Spectrum, 3000 mg | 3,000 mg | 100 mg per 1 mL | $84.99 | 2.83¢ |
| cbdMD Broad Spectrum, 1500 mg | 1,500 mg | 50 mg per 1 mL | $64.99 | 4.33¢ |
| Joy Organics THC-Free, 2250 mg | 2,250 mg | 75 mg | $89.95 | 4.00¢ |
| Joy Organics THC-Free, 1350 mg | 1,350 mg | 45 mg | $69.95 | 5.18¢ |
| Joy Organics THC-Free, 900 mg | 900 mg | 30 mg | $49.95 | 5.55¢ |
| Medterra Broad Spectrum, 1000 mg | 1,000 mg | 33 mg | $64.99 | 6.50¢ |
At equal strength the gap is easiest to see. A 3,000 mg bottle at 100 mg per mL costs $40 from Canna River and $84.99 from cbdMD. Joy Organics and Medterra don't sell a bottle that strong: their largest broad spectrum bottles hold 2,250 mg and 1,000 mg.
What's in each bottle
| Brand | Ingredient list, as published | Carrier |
|---|---|---|
| Canna River (Natural) | MCT oil, broad spectrum hemp distillate | MCT oil |
| cbdMD | Hemp extract (cannabidiol, cannabigerol, cannabinol), MCT oil, natural flavor | MCT oil |
| Medterra | Broad spectrum hemp extract (CBD, CBG, CBN, CBDV, natural terpenes), organic MCT oil | Organic MCT oil |
| Joy Organics (Unflavored) | Organic olive oil, organic broad spectrum hemp extract | Organic olive oil |
All four are short lists. The real differences are the carrier, organic status (Medterra's MCT oil is organic; every Joy Organics ingredient is USDA certified organic), and how much the brand tells you about the minor cannabinoids. cbdMD and Medterra name them on the page; Canna River reports them on each batch's lab report instead, which you can search by the batch ID on the bottle in the product documentation library.
Guarantees, shipping and subscriptions
| Brand | Money-back window | Free shipping | Subscription saving |
|---|---|---|---|
| Canna River | 60 days | Every US order, except Alaska and Hawaii | At least 20% |
| cbdMD | 60 days | Not stated on the product page | Multi-bottle savings shown instead |
| Medterra | 30 days to return | Orders of $75 or more, or any autoship | 25% |
| Joy Organics | 90 days | Orders over $40 | 20% |
Discounts narrow the price table but don't reorder it. Medterra's 25% subscription brings its bottle to $48.74, or 4.87 cents per mg, still more than three times the price per milligram of any Canna River Classic bottle at full price.
Where each brand has the edge
- Joy Organics: the only oil here made entirely from USDA certified organic ingredients, and the longest guarantee at 90 days.
- cbdMD: the most CBD in a single 1 mL serving, 250 mg in its 7,500 mg bottle, against 166.7 mg per mL in Canna River's Ultra.
- Medterra: the page says its products are US Hemp Authority certified, and it lists four named cannabinoids plus terpenes on the label.
- Canna River: every Canna River bottle, even the 15 mL, costs less per milligram than any bottle from the other three, and shipping is free with no minimum. Forbes Health named Canna River CBD Classic Tincture the Best Broad-Spectrum CBD Oil of 2026.
Frequently asked questions
Which broad spectrum CBD oil is cheapest per milligram?
Of these four, Canna River's 120 mL Ultra Classic Tincture, at 20,000 mg for $100, or 0.50 cents per mg. The cheapest from each of the others is cbdMD's 7,500 mg bottle at 1.80 cents, Joy Organics' 2,250 mg at 4.00 cents and Medterra's 1,000 mg at 6.50 cents.
Are all four THC-free?
All four are sold as broad spectrum without THC. cbdMD says each batch is tested to ensure no detectable THC, and Joy Organics labels its extract 0.0% THC. "Non-detect" has a precise meaning on a lab report; our post on what Non-THC means explains it. Check the batch report for the bottle you actually buy.
How much CBD is in one dropper?
It depends entirely on the strength. A 1 mL serving holds 100 mg in any Canna River Classic bottle, 166.7 mg in the Ultra, and 50 to 250 mg in cbdMD's range. Joy Organics and Medterra state servings in milligrams: 30 to 75 mg and 33 mg.
Which carrier oil is better, MCT or olive oil?
Either works as a carrier, because CBD dissolves in fats and oils rather than water. The carrier doesn't change how many milligrams are in the bottle, so treat it as a taste and ingredient preference: MCT oil is close to flavorless, and olive oil tastes of olive. Our MCT oil explainer covers what MCT oil is.
Are these prices current?
They were checked on each brand's site on October 25, 2026. Prices change, so redo the division with the price you see on the day: price divided by total milligrams.
Canna River products are intended for adults 21 and over. These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat or cure any disease.
