Kelp contains over 60 different vitamins, minerals, and trace elements as well as 21 amino acids. Kelp is also a complex carbohydrate and a natural source for numerous growth hormones.

What kelp is most known for is its iodine content which helps to support your dog’s glandular system as well as his metabolism.

Some of the other benefits associated with kelp include the following:
• Regulates glandular activity in the adrenal, pituitary, and thyroid glands.
• Great for skin allergies, as it helps reduce itching and inflammation.
• Contains protein and amino acids that help tissue repair.
• Iodine content helps to stimulate thyroid activity, speeding metabolism and weight loss.
• Improves glandular activity and healthy metabolism.
• High-fiber content helps digestion.
• Can help reduce dental plaque and tarter buildup.

Here’s a useful link to more information if you’re interested:
Benefits of Kelp