Biotin for Dogs: We explore the benefits, dosage, and side effects

October 27, 2022
Medically reviewed by Sara Ochoa, DVM

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Discovered in 1927, Biotin, from the B complex group, is a vitamin found in food. Biotin is an essential nutrient that is naturally present in some foods and available as a dietary supplement. Foods that contain the most Biotin include organ meats, eggs, fish, fungi, meat, seeds, nuts, and certain vegetables (such as sweet potatoes).

Biotin is also often called vitamin H, the “H” coming from the German words haar and haut (meaning hair and skin), and it is a popular supplement that promotes healthy hair and skin. However, at best, these claims are supported by only a few case reports and small studies. Biotin may be pointing toward a way to preserve beauty, but what does Biotin do to our dogs?

This blog “chews over” if dogs can take Biotin, Biotin deficiencies in dogs, the benefits for dogs, dosage tables, side effects, safety, and how to choose a Biotin supplement.


Dogs can take Biotin because it contains nutrients that improve a dog’s health, including hair and nails. Biotin is a safe, water-soluble vitamin. The excess vitamin is excreted in the urine and does not accumulate in the body. This process ensures the dog is getting the amount of Biotin it needs without any side effects.

Dog food manufacturers use Biotin as an additive in most formulas. If you look at your dog food bag, you will probably see the ingredient listed. The most popular dog food brands add Biotin to their formula because it has proven to be a safe and effective essential nutrient for dogs. Unfortunately, the amount of Biotin added into dogs’ food may not be enough for their daily intake. This is when supplements can play a role in your dog’s health but always consult your veterinarian.


Biotin deficiency in dogs appears as dry, flaky, crusty skin, hair loss, or dry hair, and brittle hair. Larger breeds and puppies that grow rather quickly can become Biotin deficient. Biotin can help older dogs maintain their energy levels and sustain their nervous system function.

Biotin is also an important part of processing fatty acids and carbohydrates; it can also help your senior dog maintain the muscle mass lost in the aging process. If you notice persistent skin, hair, and nail problems, talk to your veterinarian about Biotin deficiencies in dogs.

Biotin Deficiency Symptoms in Dogs

Biotin deficiency symptoms in dogs include:

  • Alopecia (Hair Loss)
  • Diaherra
  • Dull Coat
  • Flaky, Scaly Skin
  • Low Energy
  • Reduced Appetite
  • Slowed Growth Rate
  • Skin Lesions

Causes of Biotin Deficiency

Causes of Biotin Deficiency Include:

  • Antibiotics Interactions
  • Anti-Seizure Medications
  • Diet
  • Hereditary Disease
  • Hormonal Disturbances
  • Trauma
  • Metabolic Disorders


Biotin has benefits for the inside and the outside of your dog. For instance, a dog’s allergies, Alopecia, nails, and hair growth can benefit from supplementing Biotin in a dog’s diet.

If you're interested in adding Biotin to your dogs diet, take a look at our dog CBD chews. They contain Biotin and many other ingredients targeting skin health, like CBD oil and Wild Alaskan Salmon oil.

Biotin for dogs with allergies

As discussed earlier, Biotin is important for processing fatty acids and carbohydrates, downplaying an allergic response.

Biotin for Dogs with Alopecia

Alopecia is an autoimmune disorder that causes hair to come out and is thought to be caused by an abnormal response of the hair follicles to the normal hormonal changes that occur with changing day length. Breeds commonly affected include Boxer Dogs, Airedale Terriers, English Bulldogs, French Bulldogs, and Schnauzers. Affected dogs lose hair in well-demarcated areas, typically on the flanks (both sides of the abdomen, just in front of the rear legs).

Biotin for Dogs Nails

If your dog is experiencing brittle, cracked, or split nails, Biotin may be the solution. Dogs use their nails every day in a plethora of different ways. The nails do a lot of work for a canine such as, scratching, digging, holding, and playing. Maintaining those healthy nails is in accord with a healthy dog. Biotin promotes healthy cell growth and aids in the metabolism of protein-building amino acids that are essential for nail growth.

Biotin for Dogs Nails

  • Boost Energy and Mood
  • Brain Health
  • Connective Tissues
  • Digestion
  • Growth
  • Healthy Skin
  • Liver and nervous system health
  • Muscle Formation
  • Strengthens nails


Biotin Dosage For Dogs (Weight) Dosage (per day)
10 kg (22 lbs.) 5 mg
20 kg (44 lbs.) 10 mg
30 kg (66 lbs.) 15 mg
40 kg (88 lbs.) 20 mg
50 kg (110 lbs.) 25 mg


Biotin is a safe, water-soluble vitamin: there are no known adverse side effects. It is safe for continued long-term use if required. In the case of an overdose, the dog owner has nothing to worry about as Biotin exist the system fast.


  • Read labels to ensure product quality and safety
  • Look for a lot number on the product.
  • Choose brands with confirmed research
  • Be weary of to good to be true products
  • Don't buy human supplements for dogs, additional ingredients may have a negative impact
  • In general, the best options will be available through your veterinarian.

Biscuit's Story

I was unprepared for what would happen to my dog, Biscuit. 

Ever since she was a puppy, she’d spend her days running and playing. I’d take her on walks, to the beach, and dog parks.

Unfortunately, at age 10, she started to limp after trips to the beach. It broke my heart to see her in pain doing what she loved the most. I started feeding her a raw food diet and added high-quality supplements to ensure her nutritional needs were met. Unfortunately, while she loved the food, the limping persisted.

I went to the vet, who looked over Biscuit and said she was likely limping due to joint inflammation. She gave us something to help. This worked well at first. Biscuit was moving around more freely, and was limping less. 

However, a few days later, It was to my absolute shock that she…

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