Health Benefits Of Dark Chocolate And Its Nutritional Value

Experience more than just weight loss by adding this delicious treat to your daily diet!

Medically reviewed by Alexandra Dusenberry, MS, RDN Alexandra Dusenberry Alexandra DusenberryMS, RDN twitter_iconlinkedin_iconinsta_icon
Written by , BSc, Professional Certificate in Food, Nutrition and Health Ravi Teja Tadimalla BSc, Professional Certificate in Food, Nutrition and Health Experience: 8 years
Edited by , BA (Literature & Psychology), PG Diploma Arshiya Syeda BA (Literature & Psychology), PG Diploma Experience: 7 years
Fact-checked by , BEd, MSc (Microbiology), Diploma In Nutrition Aparna Mallampalli BEd, MSc (Microbiology), Diploma In Nutrition Experience: 5 years

Dark chocolate has a rich and delicious taste. In addition to its high nutritional value, it is a great source of antioxidants.

As per research, dark chocolate may help you lose weight. It may hinder fat digestion and absorption and make you feel fuller (1).

Dark chocolate may also promote good skin and heart health. Most of the benefits of dark chocolate come from cocoa flavanols. Flavanols are antioxidants that reduce inflammation and boost brain function. A typical cocoa solids bar contains 50-90% cocoa butter, sugar, and cocoa solids. Butter is likely to be found in it as well, though rarely.

This article discusses the benefits of dark chocolate, its nutritional profile, its potential side effects, and additional tips for choosing the best dark chocolate. Scroll down to read more.

protip_icon Know Your Ingredient: Dark Chocolate

What Is It?
A type of chocolate made of cocoa solids and butter and does not contain milk.

What Are Its Benefits?
It may promote weight loss, lower cholesterol levels, and reduce stress.

Who Can Consume It?
Anyone can consume this except people with diabetes, irritable bowel syndrome, and migraines.

How Often?
You can consume 30-60 grams per day.

Overconsumption can lead to nausea, anxiety, or skin rashes.

How Does Dark Chocolate Benefit You?

The cocoa flavanols in dark chocolate contribute to most of its benefits. These flavanols have antioxidant effects that promote heart health, help fight cancer, and boost brain function. Dark chocolate may also aid weight loss.

1. May Aid Weight Loss

Dark chocolate may aid weight loss
Image: Shutterstock

Moderate intake of dark chocolate may increase satiety and help with weight management.

Research suggests that dark chocolate may have a role to play in weight loss. It may decrease the expression of genes involved in fatty acid synthesis. This reduces the digestion and absorption of fats and carbs, thereby increasing satiety (1).

Consumption of dark chocolate could also be useful in the reduction of weight circumference in normal weight obese women (a condition that involves excess body fat with a normal body mass index) (2).

However, moderation is key. Just 100 grams of dark chocolate contains about 600 calories (3). Hence, do not have more than one cube of dark chocolate in a day.

protip_icon Did You Know?
Dark chocolate was first developed in South and Central America in 1900 BC, which is over 3000 years ago, as a drink.

2. May Protect Your Skin

The flavanols in dark chocolate can protect the skin against sun damage.

Studies show that dietary flavanols from cocoa offer photoprotection and improve dermal blood circulation (4).

This effect can be attributed to the antioxidants (especially flavanols) in dark chocolate (4).

3. May Boost Heart Health

Dark chocolate may boost heart health
Image: Shutterstock

Dark chocolate antioxidants may cut heart disease risk by preventing oxidation, lowering bad cholesterol levels, and elevating good cholesterol levels.

Habitual chocolate intake can lower the risk of coronary heart disease. Studies have suggested that dark chocolate may have more benefits than milk chocolate. One major reason for this effect could be the flavonoids in dark chocolate (5).

Some sources claim that dark chocolate may promote the production of nitric oxide, which relaxes the blood vessels and enhances blood flow. However, we need more research to establish this.

There is no evidence that those concerned with cardiovascular health must avoid dark chocolate (or chocolate, in general) (5).

Studies show that eating dark chocolate more than five times a week was associated with a 57% lower risk of coronary heart disease (6).

We know that dark chocolate is made of cocoa. As per a Japanese study, the polyphenols in cocoa powder may lower LDL (the bad cholesterol), elevate HDL (the good cholesterol), and suppress oxidized LDL (7).

It is not LDL but oxidized LDL that is a problem. The antioxidants in cocoa may prevent the LDL from getting oxidized (8).

4. May Promote Brain Function

The flavonols in dark chocolate may elevate mood and improve cognitive health in the elderly.

In a study conducted on five healthy subjects, intake of dark chocolate (with 70% cocoa content) was found to improve behavioral and brain health (9). Further research is in progress, however, to elaborate on these mechanisms.

In a second study conducted by the same team, dark chocolate was found to improve neural signaling and sensory perception (10).

Regular intake of cocoa flavanols may also be effective in improving cognitive health in the elderly with mild mental impairment (11).

Dark chocolate also promotes mood and may alleviate emotional stress. However, we need further research to understand the mechanisms involved (12).

Dark chocolate also contains a compound called epicatechin, which was found to reduce brain damage in the eventuality of a stroke (13). But not all dark chocolate is created equal. Hence, ensure you go through the list of ingredients.

5. Might Aid Cancer Prevention

Rat studies highlight a possible link between dark chocolate intake and colon cancer prevention (14). A diet including dark chocolate was found to reduce cell proliferation and inflammation.

Daily intake of small amounts of flavanols from dark chocolate and other sources may be a natural approach to potentially prevent colon cancer. However, we need more research in this regard (15).

According to the American Cancer Society, the flavanols in cocoa beans (dark chocolate) may help reduce damage to cells. But as per the report, the results don’t state if the anticancer effects could be attributed to dark chocolate, or if it’s the flavanols alone, which could be found in other foods as well (16).

Dark chocolate cocoa also contains high concentrations of catechinsi  A bioactive molecule with antioxidant properties that protect cells from damage due to free radicals (unstable atoms in the body). and procyanidinsi  A group of natural bioactive molecules found in fruits and vegetables that help protect the heart and improve vision. that may have a beneficial effect against oxidative stress and chronic inflammation, which both are risk factors for cancer (17).

6. May Aid Diabetes Treatment

Dark chocolate may aid diabetes treatment
Image: Shutterstock

Consuming dark chocolate may lower blood sugar levels, as per some studies.

It is possible that the cocoa polyphenols in dark chocolate can directly influence insulin resistance and reduce diabetes risk. They may induce the generation of pancreatic beta-cells and stimulate insulin secretion, thereby lowering blood sugar levels. More studies need to be performed to further analyze the anti-diabetic effects of dark chocolate (18).

However, reports hint that dark chocolate may have some adverse effects (although only rarely) on people who have diabetes. But this is yet to be validated by strong research.

7. May Enhance Vision

In a study, dark chocolate exhibited a better ability to improve visual acuity than its white counterpart. This effect was only temporary (for about two hours), however. The long-term effects of dark chocolate on vision health need further research (19).

8. May Promote Gut Health

The good microbes in the gut, namely Bifidobacterium and lactic acid bacteria, ferment dark chocolate and produce anti-inflammatory compounds (20).

In another study, the consumption of foods rich in cocoa flavanols could significantly improve the growth of beneficial gut bacteria (21). Although further research is required, this is a promising finding.

9. May Improve Hair Health

Dark chocolate may improve hair health
Image: Shutterstock

Dark chocolate is rich in cocoa. This cocoa contains proanthocyanidins, compounds that were known to promote hair growth in animal studies (22).

In mice, proanthocyanidins were found to induce the anagen phase of hair growth (23). Anagen is the active growth phase of hair follicles where the hair root divides rapidly, adding to the hair shaft.

Anna, a vlogger, shared her experience of using a dark chocolate mask for her hair in her video. She said, “My hair is super soft and shiny. I didn’t put any oil or leave-in conditioner in my hair last night (i).”

More research is warranted to understand if dark chocolate can actually have any impact on hair health.

protip_icon Trivia
When stored properly in a sealed container at 18-21°C / 65-70°F in a cool and dry place, dark chocolate may last up to 2 years.

We have seen some of the nutrients that make dark chocolate beneficial to human health. In the following section, we will further explore its nutritional profile.

What Is The Nutritional Profile Of Dark Chocolate?

Calorie Information
Amounts Per Selected Serving%DV
Calories605(2533 kJ)30%
From Carbohydrate185(775 kJ)
From Fat388(1624 kJ)
From Protein31.5(132 kJ)
From Alcohol~(0.0 kJ)
Amounts Per Selected Serving%DV
Total Carbohydrate46.3 g15%
Dietary Fiber11.0 g44%
Sugars24.2 g
Fats & Fatty Acids
Amounts Per Selected Serving%DV
Total Fat43.1 g66%
Saturated Fat24.7 g124%
Monounsaturated Fat12.9 g
Polyunsaturated Fat1.3 g
Total trans fatty acids0.0 g
Total trans-monoenoic fatty acids0.0 g
Total trans-polyenoic fatty acids0.0 g
Total Omega-3 fatty acids34.3 mg
Total Omega-6 fatty acids1230 mg
Protein & Amino Acids
Amounts Per Selected Serving%DV
Protein7.9 g16%
Amounts Per Selected Serving%DV
Vitamin A39.4 IU1%
Vitamin C~~
Vitamin D~~
Vitamin E (Alpha Tocopherol)~~
Vitamin K7.4 mcg9%
Thiamin0.0 mg2%
Riboflavin0.1 mg5%
Niacin1.1 mg5%
Vitamin B60.0 mg2%
Vitamin B120.3 mcg5%
Pantothenic Acid0.4 mg4%
Amounts Per Selected Serving%DV
Calcium73.7 mg7%
Iron12.0 mg67%
Magnesium230 mg58%
Phosphorus311 mg31%
Potassium722 mg21%
Sodium20.2 mg1%
Zinc3.3 mg22%
Copper1.8 mg89%
Manganese2.0 mg98%
Selenium6.9 mcg10%

*Values sourced from USDA, Chocolate, dark, 70-85% cacao solids

A bar of dark chocolate (100 grams) with 70-80% cocoa content contains about 600 calories. That is a lot, but obviously, you aren’t going to consume 100 grams of dark chocolate every day (we don’t recommend you do that either).

One ounce of dark chocolate (28 grams) contains about 3 grams of fiber, 27% DV of manganese, 25% DV of copper, 19% DV of iron, and 16% DV of magnesium.

The much-discussed goodness of dark chocolate comes from its cocoa content. Cocoa is replete with plant chemicals (called flavanols) that may protect the heart. It contains two to three times more flavanol-rich cocoa solids than its milk cousin.

The other important nutrients in dark chocolate include iron, magnesium, copper, zinc, and phosphorus – all of which contribute to your overall health (3).

Dark chocolate is a delicious and versatile ingredient. Here are some easy and lip-smacking recipes you can experiment with to satisfy your sweet tooth.

Decadent Dark Chocolate Recipes To Try

1. Dark Chocolate-Covered Strawberries

Dark chocolate-covered strawberries
Image: Shutterstock


  • 8-10 fresh strawberries
  • ½ cup of dark chocolate, chopped
  • 1 tablespoon of butter

How To Prepare

  1. Add dark chocolate and butter to a bowl and microwave for 30 seconds.
  2. Dip each strawberry into the melted chocolate and place them on parchment paper.
  3. Refrigerate for 30 minutes and enjoy!

2. Spicy Hot Dark Chocolate

Spicy hot dark chocolate
Image: Shutterstock


  • ½ cup of dark chocolate, chopped
  • 1 cup of milk
  • ¼ cup of heavy cream
  • 1 teaspoon of vanilla extract
  • ½ teaspoon of cinnamon

How To Prepare

  1. Add the heavy cream and milk to a saucepan and bring it to a boil.
  2. Simmer and add vanilla extract, dark chocolate, and cinnamon.
  3. Boil for another 2-3 minutes.
  4. Pour into a mug and enjoy.

As we discussed, not all dark chocolate is created equal. The market is flooded with different brands. How do you pick the best of the lot?

How To Choose The Healthiest Dark Chocolate

Not every dark chocolate is created equal. There are a few things to keep in mind before you go ahead and pick your bar of dark chocolate.

Though beneficial, dark chocolate can cause certain undesirable effects.

What Are The Side Effects Of Dark Chocolate?

  • Anxiety

Owing to the caffeine in dark chocolate (and chocolate, in general), excess intake can lead to anxiety issues (24). Hence, consume it in moderation.

  • Heart Arrhythmia

Dark chocolate does have great benefits for the heart. But the caffeine it contains may cause irregular heartbeat in susceptible individuals. Some research shows a link between chocolate, caffeine, and arrhythmia (25). Hence, moderation is key.

  • Diabetes

Cocoa might interfere with blood sugar control in diabetes patients (26). More research is ongoing in this regard. Please check with your doctor if you can have dark chocolate if you have diabetes.

  • Pregnancy And Breastfeeding

For pregnant and breastfeeding women, dark chocolate (and other chocolate, in general) is safe in normal amounts. Don’t go overboard (due to its caffeine content) (27). Consume in moderation.

  • Other Possible Issues With Caffeine

The caffeine in dark chocolate may also aggravate the following conditions (individuals with these conditions must consume dark chocolate in moderation):

  • Diarrhea
  • Glaucoma
  • High blood pressure
  • Irritable bowel syndrome
  • Osteoporosisi  A bone disease that causes a loss of bone density, weakening bones and increasing the risk of fractures.

However, there is less information if dark chocolate by itself may cause any of these issues. Please consult your doctor in case you have any of the health conditions.

The nutrients in dark chocolate support health in various ways, ultimately improving the longevity of life. Dark chocolate is a rich source of antioxidants. The flavonolsi  Bioactive compounds found in higher concentrations in plant-based foods that help reduce the risk of several chronic diseases. and polyphenols in dark chocolate benefit your health in several ways. Consumption of dark chocolate may aid weight loss, reduce the risk of heart disease and diabetes, improve brain function, and protect your skin from the sun. However, excess intake may lead to anxiety, heart arrhythmia, diarrhea, and high blood pressure. Hence, consume dark chocolate in moderation to reap all its benefits and boost your happiness levels!

Frequently Asked Questions

How is dark chocolate different from milk chocolate?

While dark chocolate contains the most cocoa content, milk chocolate is primarily made of milk solids. Dark chocolate also tastes slightly bitter, as opposed to its cousin that tastes milky.

What is the better option between dark chocolate and milk chocolate?

If chocolate is your guilty pleasure, then dark chocolate is the better option owing to its magnificent nutritional profile, low added sugar, and health benefits. Milk chocolate has calcium but it also contains high amounts of added sugar.

Does dark chocolate contain caffeine?

Yes. In fact, it contains more caffeine than regular milk chocolate. This is because of the high cocoa content in dark chocolate.

How much dark chocolate can you eat in a day?

You may want to stick to 1 to 2 ounces of dark chocolate per day. This can translate to 1 to 2 chocolate ‘squares’ in a dark chocolate bar.

Can you eat dark chocolate at night?

Yes, you can eat dark chocolate at night. There are no contraindications.

Is chocolate bad for the kidneys?

Chocolate usually contains potassium. If you have an advanced stage of kidney disease, check with your doctor before consuming chocolate as potassium could stress the kidneys. Otherwise, chocolate is not bad for the kidneys.

Does dark chocolate cause pimples/acne?

There is no research stating that chocolate may cause acne or pimples. A high-sugar or a high-fat diet may increase sebum production and the chances of acne. If you have acne, you may want to limit your intake of chocolate, among other foods that are high in sugar or fat.

Can dark chocolate cause weight gain?

If consumed in excess, it may add to your weight. Dark chocolate is high in calories. We suggest you stick to an ounce or less of dark chocolate a day.

Is dark chocolate good for babies?

Usually, yes, but in moderation. However, your baby may not like the bitter taste of dark chocolate.

Does dark chocolate help you sleep?

It depends on when it is consumed. There is no general consensus on dark chocolate’s impact, as it contains stimulants like theobromine and caffeine, which inhibit sleep, and a high magnesium content that may aid in promoting sleep (26).

Does dark chocolate improve eyesight?

Possibly not. According to research, there is a lack of evidence that dark chocolate may significantly improve eyesight (27).

Key Takeaways

  • Dark chocolate helps improve hair health and vision.
  • It helps improve heart health, aids in weight loss, and boosts mood.
  • Excess intake of dark chocolate may cause anxiety or arrhythmia.
  • Dark chocolate possesses caffeine, which may further worsen the symptoms of irritable bowel syndrome.

benefits of dark chocolate

Image: Stable Diffusion/StyleCraze Design Team


Articles on StyleCraze are backed by verified information from peer-reviewed and academic research papers, reputed organizations, research institutions, and medical associations to ensure accuracy and relevance. Read our editorial policy to learn more.

  1. Dark chocolate: an obesity paradox or a culprit for weight gain?, Phytotherapy Research, US National Library of Medicine, National Institutes of Health.
  2. Effects of dark chocolate in a population of Normal Weight Obese women: a pilot study, European Review for Medical and Pharmacological Sciences.
  3. Chocolate, dark, 70-85% cacao solids, FoodData Central, U.S. Department of Agriculture.
  4. Habitual chocolate consumption and risk of cardiovascular disease among healthy men and women, Heart, British Medical Journals.
  5. Chocolate Consumption is Inversely Associated with Prevalent Coronary Heart Disease: The National Heart, Lung, and Blood Institute Family Heart Study, Clinical Nutrition, US National Library of Medicine, National Institutes of Health.
  6. Plasma LDL and HDL cholesterol and oxidized LDL concentrations are altered in normo- and hypercholesterolemic humans after intake of different levels of cocoa powder, The Journal of Nutrition, US National Library of Medicine, National Institutes of Health.
  7. Daily cocoa intake reduces the susceptibility of low-density lipoprotein to oxidation as demonstrated in healthy human volunteers, Free Radical Research, US National Library of Medicine, National Institutes of Health.
  8. Dark chocolate (70% organic cacao) increases acute and chronic EEG power spectral density (μV2) response of gamma frequency (25–40 Hz) for brain health: enhancement of neuroplasticity, neural synchrony, cognitive processing, learning, memory, recall, and mindfulness meditation, The FASEB Journal.
  9. Dark chocolate (70% cacao) effects human gene expression: Cacao regulates cellular immune response, neural signaling, and sensory perception, The FASEB Journal.
  10. Benefits in cognitive function, blood pressure, and insulin resistance through cocoa flavanol consumption in elderly subjects with mild cognitive impairment: the Cocoa, Cognition, and Aging (CoCoA) study, Hypertension, US National Library of Medicine, National Institutes of Health.
  11. The neuroprotective effects of cocoa flavanol and its influence on cognitive performance, British Journal of Clinical Pharmacology, US National Library of Medicine, National Institutes of Health.
  12. The flavanol (-)-epicatechin prevents stroke damage through the Nrf2/HO1 pathway. Journal of Cerebral Blood Flow and Metabolism, US National Library of Medicine, National Institutes of Health.
  13. Effects of dark chocolate on azoxymethane-induced colonic aberrant crypt foci, Nutrition and Cancer, US National Library of Medicine, National Institutes of Health.
  14. Preventive Effects of Cocoa and Cocoa Antioxidants in Colon Cancer, Diseases, US National Library of Medicine, National Institutes of Health.
  15. Is Chocolate Good for You?, American Cancer Society.
  16. Cancer protective properties of cocoa: a review of the epidemiologic evidence, Nutrition and Cancer, US National Library of Medicine, National Institutes of Health.
  17. Use of dark chocolate for diabetic patients: a review of the literature and current evidence, Journal of Community Hospital Internal Medicine Perspectives, US National Library of Medicine, National Institutes of Health.
  18. Effects of Milk vs Dark Chocolate Consumption on Visual Acuity and Contrast Sensitivity Within 2 Hours, JAMA Ophthalmology.
  19. The precise reason for the health benefits of dark chocolate: mystery solved, American Chemical Society.
  20. Prebiotic evaluation of cocoa-derived flavanols in healthy humans by using a randomized, controlled, double-blind, crossover intervention study, The American Journal of Clinical Nutrition.
  21. Complementary and Alternative Treatments for Alopecia: A Comprehensive Review, Skin Appendage Disorders, Karger.
  22. Procyanidin oligomers selectively and intensively promote proliferation of mouse hair epithelial cells in vitro and activate hair follicle growth in vivo, The Journal of Investigative Dermatology, US National Library of Medicine, National Institutes of Health.
  23. Caffeine Concentrations in Coffee, Tea, Chocolate, and Energy Drink Flavored E-liquids, Nicotine & Tobacco Research, US National Library of Medicine, National Institutes of Health.
  24. Supraventricular tachycardia induced by chocolate: is chocolate too sweet for the heart?, The American Journal of Emergency Medicine, US National Library of Medicine, National Institutes of Health.
  25. Effects of Cocoa Antioxidants in Type 2 Diabetes Mellitus, Antioxidants, US National Library of Medicine, National Institutes of Health.
  26. Influence of Dietary Intake on Sleeping Patterns of Medical Students, Cureus, US National Library of Medicine, National Institutes of Health.
  27. Effects of Flavanol-Rich Dark Chocolate on Visual Function and Retinal Perfusion Measured With Optical Coherence Tomography Angiography, JAMA Ophthalmology, US National Library of Medicine, National Institutes of Health.
Was this article helpful?
Alexandra Dusenberry is a registered dietitian nutritionist and a certified personal trainer based in San Diego, California. She has 6 years of experience and works with clients around the world to help them reach their health and fitness goals. She believes that food is medicine and proper nutrition is healing and essential for wellbeing and quality of life. Alexandra full bio

Latest Articles