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All study protocols

Cranberry: study protocols

12 study groups say how much Cranberry participants took a day. These are the doses the studies gave. They are not a recommendation.

Cranberry: what the research found →

Dose per serving from products

322 products in our catalogue print how much Cranberry a serving holds.

Most common: 250 mg to 500 mg, 26% of 322 products.

Dose per servingProducts
10 mg or less
15
10 mg to 25 mg
25
25 mg to 50 mg
29
50 mg to 100 mg
67
100 mg to 250 mg
37
250 mg to 500 mg
84
500 mg to 1 g
44
1 g to 2.5 g
16
over 2.5 g
5

Dose per serving from research

8 study groups in 4 studies say how much Cranberry participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 500 mg to 1 g, 38% of 8 study groups.

Daily doseStudy groups
10 mg to 25 mg
1
25 mg to 50 mg
1
50 mg to 100 mg
1
100 mg to 250 mg
0
250 mg to 500 mg
2
500 mg to 1 g
3

Commonly used together

None of these 12 study groups took Cranberry with anything else.

12 study groups

Study
Suppression of Helicobacter pylori infection by daily cranberry intake: A double-blind, randomized, placebo-controlled trial
2021 · Group P-C (high-PAC encapsulated powder) · Adults aged 18–60 years with Helicobacter pylori infection
560 mg8 weeks76
Whole cranberry fruit powder supplement reduces the incidence of culture-confirmed urinary tract infections in females with a history of recurrent urinary tract infection: A 6-month multicenter, randomized, double-blind, placebo-controlled trial
2025 · Whole cranberry powder · Females aged 18–65 with a history of recurrent urinary tract infection
500 mg26 weeks75
Effectiveness of cranberry capsules to prevent urinary tract infections in vulnerable older persons: a double-blind randomized placebo-controlled trial in long-term care facilities
2014 · Cranberry, high UTI risk · Adults aged 65 and older living in long-term care facilities with diabetes, long-term catheterization, or at least one UTI in the preceding year
1 g1 year253
Effectiveness of cranberry capsules to prevent urinary tract infections in vulnerable older persons: a double-blind randomized placebo-controlled trial in long-term care facilities
2014 · Cranberry, low UTI risk · Adults aged 65 and older living in long-term care facilities, classified as low UTI risk
1 g1 year205
Suppression of Helicobacter pylori infection by daily cranberry intake: A double-blind, randomized, placebo-controlled trial
2021 · Group P-B (medium-PAC encapsulated powder) · Adults aged 18–60 years with Helicobacter pylori infection
280 mg8 weeks76
Consumption of a cranberry juice beverage lowered the number of clinical urinary tract infection episodes in women with a recent history of urinary tract infection
2016 · cranberry beverage · Women with a recent history of urinary tract infection; mean age 40.9 years
240 mL24 weeks185
Suppression of Helicobacter pylori infection by daily cranberry intake: A double-blind, randomized, placebo-controlled trial
2021 · Group J-B (low-PAC juice) · Adults aged 18–60 years with Helicobacter pylori infection
240 mL8 weeks74
Suppression of Helicobacter pylori infection by daily cranberry intake: A double-blind, randomized, placebo-controlled trial
2021 · Group J-D (high-PAC juice) · Adults aged 18–60 years with Helicobacter pylori infection
480 mL8 weeks74
Suppression of Helicobacter pylori infection by daily cranberry intake: A double-blind, randomized, placebo-controlled trial
2021 · Group J-C (medium-PAC juice) · Adults aged 18–60 years with Helicobacter pylori infection
240 mL8 weeks73
Dosage effect on uropathogenic Escherichia coli anti-adhesion activity in urine following consumption of cranberry powder standardized for proanthocyanidin content: a multicentric randomized double blind study
2010 · 36 mg PAC equivalents per day · Sexually active women aged over 18 years with normal renal function
36 mg1 day32