Do Groundnuts Cause Acne Breakouts?

Chidinma Prudence Eze | 5th year medical student and Freelance Health Writer. Medically reviewed by the DLHA Team. 

April 29, 2026.

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Picture of a small bag of groundnuts in shells spilled on a table. Image credit: Gemini AI. Click on image to enlarge.

 

Highlights 

• While there is no definitive scientific proof that groundnuts directly cause acne (pimples), individual inflammatory responses to groundnut proteins and high Omega-6 levels can trigger breakouts in some people.

• Groundnut products with added sugars (like commercial peanut butter) can spike insulin levels, increasing Insulin-like Growth Factor 1 (IGF-1), which stimulates oil production in the skin.

• Groundnuts have a high Omega-6 to Omega-3 ratio. Consuming them in excess without balancing them with Omega-3-rich foods (like salmon or walnuts) can lead to skin inflammation.

• Boiled groundnuts are generally safer for acne-prone skin than roasted ones, as they have a lower glycemic index and haven’t been subjected to oxidized fats from high-heat frying.

• There is no universal number for the quantity of groundnuts that can be taken before an acne breakout occurs, but experts suggest eating them in moderation (such as a small handful) and monitoring your skin’s specific reaction over a week to determine your personal threshold.

• To enjoy groundnuts without breakouts, stay hydrated, preferably eat the boiled variety or groundnut nut butter without added sugar, and ensure you balance your diet with anti-inflammatory Omega-3s.

 

Introduction

Acne or pimples is one of the most common skin diseases in Africa, and  ‘it can be severe in men and mild in women’  Dr Chetanna Anajem said.

In the past, common African myths were that acne is triggered by puberty. Now, people attribute it to lifestyle, and a yet popular opinion in some African countries, particularly in Nigeria and Ghana is that eating groundnuts causes pimples. If this is true, the question then should be: How many groundnuts can be consumed a day to trigger acne?

To clearly understand if there are any scientifically valid links between groundnut consumption and acne, a consultant dermatologist (Specialist skin doctor), Dr. Chetanna Anaje was interviewed to shed light on the biological triggers of acne breakouts and what to do as an individual if you associate eating groundnuts with acne. Read on.

 

Is it True that Groundnuts Cause Acne? 

A close-up photo of a hand reaching into a bowl of crunchy groundnuts; on the right, is a woman examining a small breakout in a bathroom mirror with a frustrated expression. Image credit: Gemini AI. Click on image to enlarge.

 

A cross-sectional study conducted at the Department of Dermatology and Allergy of the Ludwig-Maximilians-Universität (LMU), Munich, Germany,  found that foods like chocolate, fried foods, refined sugar, and milk were associated with acne, and vegetables, nuts, whole grains, tea, and fish were more beneficial to skin health [1]. 

Another meta-analysis discovered that diet and acne are directly linked with eating foods with high sugar content being linked to the development of acne [2].

According to Dr. Chetanna Anaje, there has not been any scientific evidence that eating groundnuts (peanuts) causes acne, but she always advises patients who complain of getting acne after eating groundnuts to avoid them.

Those who are prone to breakouts can have an inflammatory response to peanut protein. Hormonal imbalance and activation of the sebaceous glands due to androgens have been associated with acne. However, eating the right diet can help to get rid of acne.

 

Understanding IGF-1 and Sebaceous Gland Activity in Groundnut Breakouts

Groundnuts are not the direct cause of acne but there's more to it.

‎‎Groundnuts (peanuts) contain about 26g of protein, 49g of total fat, 7g of saturated fat, 24g of monounsaturated fatty acids (MUFA), and 16g of polyunsaturated fatty acids (PUFA). These nutrients are not harmful to the skin [3].

‎‎There is a scientific connection between Insulin-like Growth Factor 1 (IGF-1) and sebaceous gland activity. Insulin plays a key role in acne development by increasing the activity of sebocytes (sebaceous gland cells), which leads to more oil (sebum) production and inflammation.‎

‎This is why high glycemic index foods, like sugary snacks, white bread, and processed foods are often linked to acne. They cause a rapid spike in blood sugar, which triggers insulin release. This rise in insulin increases IGF-1 levels and, ultimately, sebum production [4, 5].‎

‎Now, how do groundnuts fit into this?‎

‎Groundnuts are not high-glycemic foods, so they don’t spike blood sugar in the same way. But they are calorie-dense and often eaten in large quantities or combined in Nigeria for example with other high-glycemic foods (like garri, bread, or sugary drinks). In these situations, they may contribute indirectly to increased insulin activity.‎

‎Also, individual responses matter. Some people may notice breakouts after eating groundnuts, possibly due to factors like portion size, overall diet, or personal sensitivity.

One of the scientific mechanisms linking acne to groundnut (peanuts) consumption is that high commercial peanut products like peanut butter contain some amount of sugar, which can cause a glucose spike and lead to an increase in the level of insulin in the blood.

 

Why the Omega-6 to Omega-3 Ratio in Groundnuts Matters

Groundnuts don’t only contain a significant amount of protein, they are also rich in fatty acids that, when consumed in excess, can promote inflammation.‎

‎They contain both Omega-6 and Omega-3 fatty acids, but it contains much more Omega-6 than Omega-3.‎

‎For healthy skin, your diet should contain more Omega-3 relative to Omega-6. When Omega-6 levels are disproportionately high, it can trigger an inflammatory response in the skin, contributing to acne. On the other hand, Omega-3 helps reduce inflammation and lowers triglyceride levels in the blood [5, 6].‎

‎This doesn’t mean you should completely avoid groundnuts. It simply means you need balance.‎

Incorporating more Omega-3–rich foods into your diet can help correct this imbalance and support clearer, healthier skin. 

‎

Boiled vs Roasted Groundnuts for Acne: Does Cooking Method Matter?

Two white bowls side-by-side: one filled with pale, moist boiled groundnuts and the other with glistening, oily roasted peanuts. Image credit: Gemini AI. Click on image to enlarge.

 

When groundnuts are fried, the oil is oxidized, and it increases the glycemic index of roasted groundnuts. Also, the oxidized fats are more likely to trigger an inflammatory response than boiled groundnuts. 

Secondly, boiled groundnuts have not been subjected to high-heat oil changes, so they retain their natural moisture and have a glycemic index that's low. If consuming foods with groundnut oil and having an acne breakout is a struggle for you, it is best to switch to boiled groundnuts, which align with the low glycemic food index and acne prevention [7].

 

Aflatoxin and Skin Inflammation: The Hidden Danger of Poor Storage

 The presence of Aflatoxin in groundnuts can cause skin inflammation. Aflatoxins are toxic molds that can be seen in groundnuts that are stored in a warm, humid environment. Aflatoxins cause a low-level chronic inflammatory response to peanut protein, which are seen less in fresh and high-quality groundnuts.

In some local markets across Ghana, Aflatoxin was found in some randomly selected groundnuts and their by-products, such as the paste, and all of this is a result of either poor manufacturing practices or poor storage practices [8].

Therefore, it's important to look out for high-quality groundnuts without the presence of molds.

 

The Verdict: Does Groundnut Consumption Trigger Acne?

A handful of roasted groundnuts in a cupped palm with a bowl of roasted groundnuts in the background. Image credit: Gemini AI. Click on image to enlarge.

 

There are no scientific evidence that support a direct cause and effect link between groundnut consumption and acne breakout. Some claims of association may actually be a result of allergy.

If however, based on your experience, you are inclined to believe that you get acne breakout whenever you eat groundnuts, you will do well to talk with your healthcare provider.

 

How to Prevent Groundnuts Associated Acne 

A photo of a glass of water with a lemon slice next to a small bowl of groundnuts. Image credit: Gemini AI. Click on image to enlarge.

 

If you still break out with acne whenever you eat your favourite groundnuts, here are some ways to manage the situation: 

• Drinking enough water will help your body manage inflammation
• You can quit eating groundnuts for 2-3 weeks to know if it's the trigger
• Balance it with other healthy and Omega-3 rich foods such as salmon flaxseeds, and walnuts. to reduce the high Omega-6 content found in groundnuts.
• Eat groundnuts in moderation 
• Visit your dermatologist if all efforts fail to stop the acne

 

Conclusion

How groundnuts affect your skin isn’t just about how many you eat, it also depends on how they’re prepared and how your body responds, especially in relation to IGF-1.‎

‎Groundnuts are high in Omega-6, which means that when consumed in excess, they may trigger inflammation and contribute to acne, particularly in acne-prone individuals. That’s why it’s important to stick to a moderate, safe amount.‎

‎Whether you eat them boiled or roasted, or you’re trying to balance them with more Omega-3–rich foods, always pay attention to your skin.‎

‎And if your acne persists, don’t hesitate to see a dermatologist (specalist skin doctor).‎

‎Most importantly, don’t let the fear of pimples stop you from enjoying your favourite snack. Just eat mindfully and stay aware of how your skin responds.

‎

 

References:

1. Meixiong J, Ricco C, Vasavda C, Ho BK. Diet and acne: A systematic review. JAAD Int. 2022 Jun;7:95-112. doi: 10.1016/j.jdin.2022.02.012. Available from here. 

2. Guertler A, Volsky A, Eijkenboom Q, Fiedler T, French LE, Reinholz M. Dietary Patterns in Acne and Rosacea Patients—A Controlled Study and Comprehensive Analysis. Nutrients 2023;15(20):4405. doi: 10.3390/nu15204405. Available from here.   

Kim Y, Keogh JB, Clifton PM. Benefits of nut consumption on insulin resistance and cardiovascular risk factors: multiple potential mechanisms of action. Nutrients. 2017 Nov 22;9(11):1271. doi: 10.3390/nu9111271. Available from here.

Baldwin H, Tan J. Effects of Diet on Acne and Its Response to Treatment. Am J Clin Dermatol. 2021 Jan;22(1):55–65. doi: 10.1007/s40257-020-00542-y. Available from here. 

5. Okoro OE, Camera E, Flori E, Ottaviani M. Insulin and the sebaceous gland function. Front Physiol. 2023 Sep 1;14:1252972. doi: 10.3389/fphys.2023.1252972. Available from here.

6. Cudmore D. The Omega 3 to 6 Fat Ratio of Common Nuts [Data] [Internet]. VegFAQs; 2025 Jun 30. Available from here.

7. Ajmera R. Glycemic Index: What It Is and How to Use It [Internet]. Healthline. 2025 Jan 14 [cited 2026 Mar 16]. Available from here. 

8. Kortei NK, Annan T, Akonor PT, Richard SA, Annan HA, Wiafe-Kwagyan M, et al. Aflatoxins in randomly selected groundnuts (Arachis hypogaea) and their products from some local markets across Ghana: Human risk assessment and monitoring. Toxicol Rep. 2021 Jan 8;8:186-195. doi: 10.1016/j.toxrep.2021.01.002. Available from here. 

 

 

Related: 

Food Allergies and Intolerance in African Adults: Causes, Diagnosis and Prevention

How to Manage Acne in African Skin: Tips and Natural Remedies

The Challenges of Acne Treatment in Africans

Treatment of Acne in Africans

How Acne Can Affect You as An African

 

 

Published: April 29, 2026

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