Green Coffee: Health Benefits, How to Consume & Side Effects

Key points
  • Green coffee contains high levels of chlorogenic acid, which helps manage blood sugar, lower cholesterol, and protect cells from antioxidant damage.
  • The caffeine in these unroasted beans provides a thermogenic effect that can support weight loss when combined with a balanced diet and regular exercise.
  • You should consult a healthcare professional before use, as excessive intake can cause side effects like anxiety, insomnia, or digestive issues.

Green coffee refers to unroasted coffee beams that may help manage blood sugar and lipid levels. These raw beans are frequently used as a natural supplement to support weight loss and metabolic health.

Because they are not roasted, these beans retain a high concentration of bioactive compounds like chlorogenic acid. This substance, along with caffeine, provides antioxidant and thermogenic properties that benefit the body.

Green coffee is available in several forms, including whole beans, powders, and concentrated capsule supplements. You should speak with a doctor or nutritionist before starting a regimen to ensure safe caffeine levels and avoid complications.

Green coffee beans spilling onto table

Health benefits

Green coffee may be beneficial for:

1. Supporting diabetes management

The chlorogenic acid found in green coffee helps reduce the absorption of sugar in the intestines after meals. This prevents rapid spikes in blood glucose levels, which can assist in the long-term management of diabetes.

However, it is important to note that more rigorous scientific studies are still needed to fully confirm the effectiveness of green coffee in controlling blood sugar.

2. Assisting with weight loss and management

Green coffee contains caffeine, a thermogenic substance that increases the body's caloric expenditure, even while at rest.

Additionally, green coffee may help limit the absorption of sugar and fats, supporting general weight control efforts.

For effective weight loss, it remains essential to maintain a balanced diet and engage in regular physical activity, as the thermogenic effect of green coffee is not strong enough to produce significant results on its own.

3. Improving blood lipid profiles

Chlorogenic acid can interfere with the way the body absorbs fat, potentially lowering cholesterol and triglyceride levels. This contributes to better heart health and a lower risk of developing cardiovascular diseases.

While there are promising signs of these benefits, the effectiveness of green coffee for improving blood lipids still requires confirmation through more comprehensive clinical research.

4. Fighting free radicals

Green coffee provides antioxidant benefits primarily through chlorogenic acid, caffeic acid, caffeine, and other polyphenols.

These compounds help protect healthy cells from damage caused by free radicals, which helps prevent premature aging and chronic inflammation.

5. Reducing fatigue

Due to its natural caffeine content, green coffee can help improve alertness and a sense of well-being while reducing feelings of sleepiness or exhaustion.

Does green coffee promote weight loss?

Green coffee can support weight loss due to its thermogenic effect, which increases energy expenditure and stimulates fat metabolism in the liver. These processes encourage the body to burn stored fat more efficiently.

However, green coffee by itself is not a magic solution for weight loss because its thermogenic impact is relatively mild.

To achieve sustainable weight loss, it is fundamental to follow a varied, balanced diet and participate in consistent physical exercise.

How to consume

Green coffee can be prepared as a tea by using approximately 4 to 5 beans for every 8 ounces (250 ml) of water, with a limit of two cups per day.

It is also available in powder form, which can be mixed into warm water, juices, or smoothies at a recommended serving of 1 to 2 grams per day.

Oral capsule supplements may be taken for up to 12 weeks, with typical dosages ranging from 50 to 400 mg daily. It is generally suggested to take half the dose at breakfast and the remaining half with lunch.

The appropriate dosage of green coffee varies based on the concentration of bioactive compounds and your specific health goals. For this reason, green coffee supplements should only be used under the direction and supervision of a physician or nutritionist.

Possible side effects

Possible side effects associated with excessive or long-term use of green coffee include:

  • Anxiety, irritability, and restlessness

  • Insomnia

  • Dehydration

  • Dizziness and tremors

  • Rapid heart rate (tachycardia)

  • Stomach pain

  • Nausea or diarrhea

Some individuals may experience headaches when they first start using the supplement due to the increased level of caffeine in the bloodstream.

Furthermore, extreme excess of green coffee can lead to severe complications such as seizures, vomiting, respiratory distress, tremors, and, in rare cases, death.

Because it contains caffeine, green coffee should not be consumed in the evening, as it can disrupt your sleep cycle and quality of rest.

Who should avoid it

Green coffee supplements should not be used by pregnant or breastfeeding women, children, or adolescents under the age of 19. It is also contraindicated for individuals with high blood pressure, acid reflux, stomach ulcers, or gastritis.

Due to the caffeine content, green coffee should be avoided by those suffering from insomnia, anxiety, migraines, tinnitus, or labyrinthitis, as it may worsen these conditions.

Green coffee should not be combined with other caffeine-containing supplements or foods, as this significantly increases the risk of adverse effects.

Additionally, individuals with existing heart disease or those taking other medications or dietary supplements should always consult their doctor before adding green coffee to their routine.