As cool as a cucumber
Known for its refreshing and crisp flavour, cucumber (Cucumis sativus) has been cultivated for over 3,000 years and is widely enjoyed in many culinary traditions. A member of the Cucurbitaceae family (alongside pumpkins and melon) it has also been used in Chinese and Indian medicine from ancient times, with the seeds being used to prevent constipation and the juice for skin irritations and to reduce swelling. It is even said to have wound healing properties.
Cucumber offers a range of benefits that make it a valuable addition to a balanced canine diet. Its low-calorie profile, coupled with essential vitamins and minerals, makes it suitable for various health needs, from hydration and weight management to bone and heart health. So, while perhaps not immediately obvious as a source of nutrition, the humble cucumber deserves its place in the Well Dog Pantry.
Main Nutrients
Fibre
Cucumber, while not as rich in fibre as other vegetables, still provides a modest amount that can aid in maintaining digestive health in dogs. Fibre helps regulate bowel movements and support gastrointestinal function, which is particularly beneficial for dogs prone to constipation.
Antioxidants
Cucumbers contain a variety of antioxidants, including flavonoids and tannins, which help neutralise free radicals and reduce oxidative stress. Cucumber polysaccharide has high antioxidant activity[1]. One study also investigated the antibacterial and anti-cancer activity of the phyto compounds in cucumbers[2].
Water Content
Cucumbers are high in water content (about 95% water, making them an excellent source of hydration, especially in warm weather. This high water content also helps keep dogs hydrated, supporting kidney function and maintaining healthy skin and coat.
Main Vitamins
Vitamin K
Cucumbers are a good source of vitamin K, which plays a vital role in blood clotting and bone health. Adequate intake of vitamin K is important for dogs to maintain strong bones and to prevent excessive bleeding from injuries.
B Vitamins (B1, B5, B7)
Cucumbers provide several B vitamins, including B1 (thiamine), B5 (pantothenic acid), and B7 (biotin). These vitamins are essential for energy metabolism, supporting nerve function, and maintaining healthy skin and coat in dogs.
Minerals
Potassium
Cucumber contains potassium, which is crucial for maintaining electrolyte balance, supporting muscle function, and promoting healthy heart activity. Adequate potassium levels are important for active dogs, helping to prevent muscle cramps and ensuring proper nerve function.
Magnesium
Magnesium in cucumber supports muscle and nerve function, aids in the absorption of other minerals, and helps maintain a healthy heart rhythm. It is essential for overall well-being, particularly in maintaining bone health and regulating blood sugar levels.
Benefits – Key Takeaways:
Hydration
Cucumber’s high water content makes it an ideal snack for keeping dogs hydrated, especially in hot weather or after exercise. Hydration is crucial for maintaining kidney function, promoting healthy skin and coat, and supporting overall cellular function. The natural hydrating properties of cucumber help prevent dehydration, which can be particularly beneficial for dogs that may not drink enough water.
Weight Management
Cucumber is low in calories, making it an excellent treat option for dogs that need to manage their weight. Its high water and fibre content contribute to a feeling of fullness, helping to control appetite without adding extra calories. This makes cucumber suitable for dogs on a weight management programme or those prone to obesity.
Digestive Health
The modest fibre content in cucumber aids in promoting regular bowel movements and supporting digestive health. This can be particularly beneficial for dogs that experience occasional constipation or digestive discomfort. The fibre in cucumber helps ensure smooth digestion and the overall well-being of the gastrointestinal tract.
Bone Health
The vitamin K content in cucumber supports bone health by aiding in the formation and maintenance of strong bones. This is particularly important for growing puppies and aging dogs, who may be more prone to bone-related issues. Vitamin K also plays a role in blood clotting, which is essential for dogs that are active and may sustain injuries.
Immune Support
Cucumber provides a range of vitamins and antioxidants that support the immune system. The presence of vitamin C, in particular, helps enhance the immune response, protecting dogs from infections and diseases. Additionally, the antioxidants in cucumber help reduce inflammation, supporting overall immune health and longevity.
Skin and Coat Health
The combination of B vitamins, particularly biotin, along with the hydration provided by cucumber, supports healthy skin and a shiny coat. Biotin (vitamin B7) is known to promote the health of hair follicles, and adequate hydration is crucial for maintaining skin elasticity and coat glossiness, making cucumber a beneficial addition to the diet of dogs with skin or coat concerns.
Heart Health
The potassium and magnesium found in cucumber contribute to cardiovascular health by supporting proper heart function, maintaining healthy blood pressure levels, and preventing muscle cramps.
Tip:
Cucumbers and cucumber juice can be easily incorporated in hydrating drinks and frozen treats.
Try these recipes:
Cucumber and courgette hydrating drink
References:
[1] Chen S, Huang H, Huang G. Extraction, derivatization and antioxidant activity of cucumber polysaccharide. Int J Biol Macromol. 2019 Nov 1;140:1047-1053. doi: 10.1016/j.ijbiomac.2019.08.203. Epub 2019 Aug 24. PMID: 31454644.
[2] A.A. Tuama, A.A. Mohammed. Phytochemical screening and in vitro antibacterial and anticancer activities of the aqueous extract of Cucumis sativus. March 2019. doi.org/10.1016/j.sjbs.2018.07.012
Want to know more? These studies may be useful:
- Uthpala, T. G. G., R. A. U. J. Marapana, K. Lakmini, and D. C. Wettimuny. 2020. Nutritional bioactive compounds and health benefits of fresh and processed cucumber (Cucumis sativus L.). Sumerianz J. Biotechnol. 3:75–82.
- Mukherjee PK, Nema NK, Maity N, Sarkar BK. Phytochemical and therapeutic potential of cucumber. Fitoterapia. 2013 Jan;84:227-36. doi: 10.1016/j.fitote.2012.10.003. Epub 2012 Oct 23. PMID: 23098877.
- Insanu M, Zahra AA, Sabila N, Silviani V, Haniffadli A, Rizaldy D, Fidrianny I. Phytochemical and Antioxidant Profile: Cucumber Pulp and Leaves Extracts. Open Access Maced J Med Sci [Internet]. 2022 Feb. 9 [cited 2024 Aug. 22];10(A):616-22. doi.org/10.3889/oamjms.2022.8337
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Nutritional information:
Cucumber, raw, with peel 100g

For full nutrient content see Food Data Central
Important Considerations:
- Always consult your veterinarian before making any significant dietary changes, particularly where there are pre-existing health conditions or dietary restrictions.
- If you are feeding commercial food, check the label for ingredients before giving more. Excessive intake of any foods can have adverse effects.
- Ensure (where possible) that you use high-quality, organic products specifically formulated for pets (or better still, human grade ingredients) to avoid any potential adverse effects.
- Introduce new foods gradually to avoid adverse effects such as gastrointestinal upset or diarrhoea.
- I provide nutritional information purely as a helpful guide. Nutritional information on ingredients is obtained from the US Department of Agriculture’s FoodData Central site (https://fdc.nal.usda.gov/index.html) and any nutritional information provided in recipes is based on an online calculator: calories and other information will vary based on brands, ingredients and other factors.
- Check nutrient levels and recommendations for your dog’s weight, age and activity. For example this nutritional guideline produced by FEDIAF.
- I am not a professional nutritionist. I am sharing recipes that I have created and tested in my kitchen and that have been tasted and approved by our doggy friends.