Can Guinea Pigs Eat Thyme? (How Much is Safe?)

Guinea pigs are adorable little furry potatoes that thrive on a variety of fruits and vegetables. As their owners, we must ensure that they have a balanced diet that meets their nutritional needs.

One question that often arises when it comes to feeding guinea pigs is whether or not they can eat thyme.

Guinea pigs can eat thyme in moderation as it is very rich in vitamins and minerals, especially vitamin C. However, thyme is incredibly high in calcium, so it should be fed sparingly to reduce the risk of bladder stone development.

Thyme is a popular herb commonly used in cooking and has numerous health benefits for humans. However, when it comes to feeding it to guinea pigs, there are some important factors to consider.

This article will explore the nutritional benefits and potential risks of feeding thyme to guinea pigs and guide you on safely incorporating it into their diet.

Nutritional Profile of Thyme

Thyme is a herb from the mint family and is commonly used in cooking. It is a rich source of essential vitamins and minerals that can benefit human health. Similarly, guinea pigs can also benefit from the nutritional properties of thyme.

Thyme is rich in vitamins C and K, essential for maintaining your guinea pig’s health. Vitamin C is crucial for guinea pigs as they cannot produce it independently, and a deficiency can lead to serious health problems. 

Additionally, thyme contains minerals such as calcium, iron, and manganese, which are important for bone health, oxygen transport, and antioxidant functions. A 100-gram serving of fresh thyme contains approximately 160 mg of vitamin C, 160 mg of magnesium, and 17.4 mg of iron, making it a great source of essential nutrients for guinea pigs.

NutrientAmount per 100g
Fat1.68 g
Carbohydrate24.4 g
Fiber14 g
Protein5.56 g
Vitamin C160 mg
Calcium405 mg
Phosphorus106 mg
Vitamin A, IU4750 IU
Iron17.4 mg
Magnesium160 mg
Manganese1.72 mg
Potassium609 mg
Sodium9 mg
Zinc1.81 mg
Source: USDA Food Database

Benefits and Risks of Thyme for Guinea Pigs

Thyme can provide several great benefits for guinea pigs. Still, it can also pose some risks if not given in moderation.


  • Rich in Vitamin C: This nutrient is essential for guinea pigs to help maintain their immune system, skin, and connective tissues.
  • Contains Vitamin K1: This nutrient plays a crucial role in blood clotting and bone health.
  • May Reduce Blood Pressure: Certain varieties of thyme have been shown in studies to reduce blood pressure and cholesterol levels.
  • Extremely Nutrient-Rich: Thyme provides many minerals such as calcium, iron, and manganese that are essential for your guinea pig’s overall health.
  • Antioxidant-Rich: Thyme also has many antioxidant properties that can help protect guinea pigs from cellular damage and reduce the risk of chronic diseases like cancer and heart disease.


  • Digestive Issues: Excessive consumption of thyme can lead to digestive issues such as diarrhea, bloating, and abdominal pain due to its natural essential oils.
  • High in Calcium: Thyme contains very high levels of calcium, and excessive intake of this mineral can lead to bladder stones in guinea pigs.
  • Guinea Pigs May Dislike it: Due to its intense flavor and taste, some guinea pigs may not like this fragrant herb.
  • Pesticides and Chemicals: Pesticides and herbicides used in commercially grown thyme can harm guinea pigs. It’s best to use organic thyme or grow it without chemicals. If that’s not possible, be sure to rinse the thyme thoroughly before feeding it to your piggies.
  • Allergies: Although uncommon, there is a chance your guinea pig may be allergic or have a bad reaction to thyme. It’s important to introduce all new foods gradually and watch for any adverse reactions before increasing the amount.

Thyme can be a healthy addition to a guinea pig’s diet if given in moderation and introduced gradually.

How Much and How Often Can Guinea Pigs Eat Thyme?

Guinea pigs can eat thyme, but it should be given in moderation. A few sprigs of fresh thyme once a week can provide your guinea pig with the nutrients they need without overloading them with calcium. However, if your guinea pig has had previous experiences with bladder stones or sludge, it’s best to avoid feeding thyme to them entirely.

It’s essential to remember that thyme should not be your guinea pig’s primary food source; their diet should consist mainly of hay, fresh vegetables, and a small number of pellets. Overfeeding thyme or any other food can lead to digestive issues such as diarrhea, bloating, and abdominal pain.

Additionally, guinea pigs should have access to clean and fresh water at all times, and their food and water dishes should be cleaned daily to avoid contamination. You can ensure their health and well-being by providing your guinea pig with a balanced and varied diet.

Incorporating Thyme into Your Guinea Pig’s Diet

If you want to incorporate thyme into your guinea pig’s diet, there are a few things you need to keep in mind to ensure their safety and well-being.

  • Introduce Thyme Gradually: Guinea pigs can have sensitive digestive systems, so it’s best to introduce thyme gradually to avoid any digestive issues. Start by giving them a small amount of thyme and monitor them for any signs of discomfort or digestive issues.
  • Use Fresh Thyme Only: Fresh thyme is a better option than dried thyme as it contains more nutrients and is less likely to be contaminated by chemicals. Wash the thyme thoroughly before feeding it to your guinea pig.
  • Limit the Amount: Thyme should not be the primary food source for guinea pigs and should only be given as a supplement. A few sprigs of fresh thyme once every week or two provides them with the nutrients they need without overloading them with calcium.
  • Try Growing Your Own Thyme! This herb is easy to grow in planters and it’s also perennial, meaning it will grow back each year when planted in the garden. Growing thyme is a fun project that can provide you with an evergrowing source of organic produce for you and your piggies.

Incorporating thyme into your guinea pig’s diet can provide them with essential vitamins and minerals. Still, it should be done with caution and in moderation. Following these guidelines, you can safely introduce thyme into your guinea pig’s diet and ensure their well-being.

Other Herbs and Foods Suitable for Guinea Pigs

Besides thyme, several other herbs and foods are suitable for guinea pigs. These include:

TJ with some curly parsley.
  • Parsley: Rich in vitamin C and iron, parsley can be given to guinea pigs in moderation.
  • Basil: A good source of vitamin C and antioxidants, basil can be fed to guinea pigs in small amounts due to its high calcium levels.
  • Cilantro: High in vitamin C and fiber, cilantro can be given to guinea pigs in moderation.
  • Mint Leaves: These aromatic leaves can be offered to guinea pigs once a week.
  • Dill: This leafy green herb is vitamin-rich and very popular with guinea pigs!
  • Dandelion Greens: Rich in vitamin A, calcium, and antioxidants, dandelion greens can be given to guinea pigs in small amounts.
  • Clover: This green leafy forage is often found outside and can be fed to guinea pigs sparingly.
  • Carrots: A good source of vitamin A, carrots can be fed to guinea pigs as a treat in moderation.

Herbs in particular are very nutrient-rich but generally also high in calcium. They are easy to grow and make a great addition to your guinea pig’s diet in moderation. For a thorough list of herbs you can feed your piggy, check out our complete list of safe herbs for guinea pigs.

It’s important to remember that any new food introduced to a guinea pig’s diet should be done gradually and in small amounts to avoid digestive issues. Additionally, some foods may be high in calcium or phosphorus, so it’s essential to balance their diet with various foods to meet their nutritional needs.

Final Thoughts

While thyme can be a fantastic and nutrient-rich addition to your guinea pig’s diet, it’s crucial to be aware of the downsides before feeding it. Calcium in particular can be dangerous to guinea pigs, as piggies absorb a higher percentage of calcium from their foods and require much less of it than humans and many other animals.

For every high-calcium food you offer your guinea pig, it’s important to feed at least 2-3 low-calcium fruits or veggies to balance out the calcium levels. For a list of good options, you can check out our list of the 21 best low-calcium foods for guinea pigs.

You can also read through the Guinea Pig Food Chart to get calcium and Vitamin C levels of every food your guinea pig can eat for easy comparison.

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