Theobromine

Cocoa theobromine

Snapshot

Indications	Contraindications
LDL cholesterol lowering¹ Vascular function markers² Exercise performance³	Pregnancy or nursing⁴ Under 18 years⁴ High blood pressure⁴ Heart disease⁴ Antidepressant use⁴

Theobromine (3,7-dimethylpurine-2,6-dione) is a methylxanthine related to caffeine and present in high levels in cocoa⁵. Supplementation has been studied for mood and alertness; in healthy volunteers, low doses had limited effects while higher doses worsened mood and raised heart rate⁵. It is also tested for persistent cough and for enamel remineralization.

The evidence is mixed. In healthy adults, lower doses produced limited subjective effects, higher doses produced negative mood effects, and heart rate rose with dose⁵. A crossover trial found LDL cholesterol fell while postprandial glucose and insulin responses worsened. Blood pressure findings split: theobromine-enriched cocoa raised 24-hour ambulatory systolic pressure while lowering central systolic pressure⁶. A persistent cough trial missed its primary endpoint⁷. A 2024 meta-analysis of in vitro studies found theobromine increased enamel microhardness after demineralization, comparable to fluoride, without human data⁸. Products listing theobromine number 2577, mostly powders with some capsules; see Form comparison.

The cardiovascular signals explain the label cautions.⁴ Product labels warn against use, or ask for physician consultation, in people with high blood pressure, heart disease, or antidepressant use⁴.

Last updated October 17, 2026. Read how we make monographs.

In the full monograph

35 sources, 25 studies

When to useThe situations practitioners use it for, each with the reason and the study behind it.
SafetyWho should avoid it, who needs extra care, and the side effects reported in studies.
InteractionsThe medicines and supplements it interacts with, the effect of each, and what labeling says to watch.
Protocol notesThe doses used in studies, how and when they were taken, and how the forms on the market compare.
How it worksWhat it is and how it works in the body, in plain terms.
Published studiesThe studies behind each use, popular claims checked against them, and trials still under way.
Word of mouthWhat patients and practitioners report online, kept separate from the clinical evidence.
Clinical perspectiveA closing read of where the evidence is solid, where it is thin, and what has not been studied.

Snapshot

In the full monograph

Sources