Cannabidiol

Best for

Reduce everyday pain intensity

Likely strong benefit · 45–600 mg/day for 1–9 weeks · 1 meta-analysis , n=378

12 papers · 11 claims · 47 outcomes scored · 7 positive

Outcomes

What cannabidiol actually does, by outcome

Each row is one outcome with effect size, evidence base, the dose that worked in trials, and time to first effect. Magnitude tiers come from native-unit MCID where available, Cohen's d otherwise.

Outcome Effect size Evidence Dose Weeks Rank

Reduce everyday pain intensity Likely strong benefit

Lower intensity, fewer flares, and longer stretches of relief.

6 meta-analyses n=378 45–600 mg 1–9 wk #6/55

36803360·40748522·40839290·41487518 +2 more

large

6 meta-analyses n=378 Meta-analyzed I²=97%

45–600 mg

1–9 wk

#6 /55

Reduce seizure frequency in epilepsy Likely modest benefit

Fewer episodes and steadier brain electrical activity day and night.

1 RCT n=149 50 mg/kg/day 16 wk

33346789

small

1 RCT n=149

50 mg/kg/day

16 wk

—

Lower day-to-day anxiety Not enough research

The background hum of worry that colors everything gets quieter.

4 meta-analyses n=129 50–600 mg 4 wk

31810437·32383271·35445839·40748522

trivial

4 meta-analyses n=129 Meta-analyzed I²=92%

50–600 mg

4 wk

—

Ease anxiety in older adults Not enough research

Quiets the health worries and body tension that build with age.

4 meta-analyses n=129 50–600 mg 4 wk

31810437·32383271·35445839·40748522

trivial

4 meta-analyses n=129 Meta-analyzed I²=92%

50–600 mg

4 wk

—

Reduce pre-competition anxiety Not enough research

Quiets the overthinking that hijacks execution right before you compete.

4 meta-analyses n=129 50–600 mg 4 wk

31810437·32383271·35445839·40748522

trivial

4 meta-analyses n=129 Meta-analyzed I²=92%

50–600 mg

4 wk

—

Reduce daily stress Not enough research

Everyday pressure stops running your nervous system hot.

2 RCTs n=48 50–600 mg 4 wk

31810437·35445839

trivial

2 RCTs n=48

50–600 mg

4 wk

—

Lift and steady your mood Not enough research

Good days come more often and bad ones feel less heavy.

1 RCT n=48 600 mg — #6/20

35445839

trivial

1 RCT n=48

600 mg

—

#6 /20

Improve overall sleep quality Not enough research

Deeper, less interrupted nights that leave you recharged by morning.

3 RCTs n=43 45–300 mg 8–9 wk

40357520·40839290·41487518

trivial

3 RCTs n=43

45–300 mg

8–9 wk

—

Ease depression symptoms Not enough research

Lowers the weight of sadness, low energy, and emotional numbness over weeks.

2 RCTs n=43 45–600 mg 4–9 wk

31810437·41487518

trivial

2 RCTs n=43

45–600 mg

4–9 wk

—

Ease winter depression symptoms Not enough research

Compensates for the sunlight deficit when days get short.

2 RCTs n=43 45–600 mg 4–9 wk

31810437·41487518

trivial

2 RCTs n=43

45–600 mg

4–9 wk

—

Ease depression tied to chronic pain Not enough research

When pain loosens its grip, mood follows.

2 RCTs n=43 45–600 mg 4–9 wk

31810437·41487518

trivial

2 RCTs n=43

45–600 mg

4–9 wk

—

Outcome	Effect	Evidence	Dose	Weeks	Rank
Reduce everyday pain intensity Likely strong benefit	large	6 meta-analyses n=378 Meta-analyzed	45–600 mg	1–9 wk	#6/55
Reduce seizure frequency in epilepsy Likely modest benefit	small	1 RCT n=149	50 mg/kg/day	16 wk	—
Lower day-to-day anxiety Not enough research	trivial	4 meta-analyses n=129 Meta-analyzed	50–600 mg	4 wk	—
Ease anxiety in older adults Not enough research	trivial	4 meta-analyses n=129 Meta-analyzed	50–600 mg	4 wk	—
Reduce pre-competition anxiety Not enough research	trivial	4 meta-analyses n=129 Meta-analyzed	50–600 mg	4 wk	—
Reduce daily stress Not enough research	trivial	2 RCTs n=48	50–600 mg	4 wk	—
Lift and steady your mood Not enough research	trivial	1 RCT n=48	600 mg	—	#6/20
Improve overall sleep quality Not enough research	trivial	3 RCTs n=43	45–300 mg	8–9 wk	—
Ease depression symptoms Not enough research	trivial	2 RCTs n=43	45–600 mg	4–9 wk	—
Ease winter depression symptoms Not enough research	trivial	2 RCTs n=43	45–600 mg	4–9 wk	—
Ease depression tied to chronic pain Not enough research	trivial	2 RCTs n=43	45–600 mg	4–9 wk	—

Buy well

Recommended Cannabidiol products

Real products that dose Cannabidiol where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.

Chosen for adequate Cannabidiol dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.

Sources

Generated August 14, 2026

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