VetriScience Composure is a thiamine-forward calming chew that discloses its three actives per chew and is backed by manufacturer-hosted, product-specific study material — an unusual strength in this category. It contains no melatonin, so it targets daytime stress rather than sleep.
Ownership disclosure: This website is owned and operated by Pure Majesty Pets, which makes and sells a melatonin liquid for dogs that we mention in our comparisons. We rank and describe products using their labeled ingredients and published research, not paid placement — but you should read our owned-product coverage with that relationship in mind. Read the full disclosure.
What the current label lists
| Active | Per chew (3.2 g) |
|---|---|
| Thiamine (Vitamin B1) | 134 mg |
| Colostrum Calming Complex (biopeptide blend) | 22 mg |
| L-theanine | 21 mg |
Strengths
- Discloses each active with an exact amount — no proprietary blend hiding the numbers.
- Manufacturer has product-specific study material, which most competitors (including Pure Majesty) lack.
- L-theanine has supportive dog evidence for situational anxiety (Araujo 2010; Pike 2015).
Limitations
- Contains no melatonin, so it is not aimed at sleep-cycle support.
- A chew format offers fixed amounts, with less fine adjustment than a liquid.
- As with any finished blend, product-level results still vary by dog.
Always screen inactive ingredientsActives are only half the label. Read the inactive ingredients and reject anything containing xylitol (FDA), especially in flavored or human products.
Read alsoCompare this against other products — see where it lands in the full, same-unit calming comparison.
Read alsoHow melatonin evidence actually stacks up — understand what melatonin does and does not do before choosing a melatonin product.
Pure Majesty Pets Melatonin for Dogs — labeled actives per 1 mL
| Active ingredient | Per 1 mL |
|---|---|
| Melatonin | 3 mg |
| L-theanine | 50 mg |
| Alpha-casozepine | 25 mg |
| Water-soluble chamomile extract | 25 mg |
| Elemental magnesium | 5 mg |
| Vitamin B6 (as P5P) | 0.5 mg |
Pure Majesty publishes this six-active formula on its product page (labeled per 1 mL, updated July 2026); confirm the panel printed on the bottle you receive. Ingredient amounts describe what is in the bottle; they do not by themselves prove a calming or sleep outcome, and this exact six-active blend has not been tested in a published canine clinical trial.
Frequently asked questions
Does VetriScience Composure contain melatonin?
No. Its labeled actives are thiamine, a colostrum calming complex, and L-theanine. It targets daytime stress, not sleep.
Is VetriScience Composure backed by research?
The manufacturer hosts product-specific study material, which is a genuine advantage over most calming chews. Ingredient evidence for L-theanine also exists (Araujo 2010; Pike 2015).
How is it different from a melatonin product?
It has no melatonin; it relies on L-theanine and a colostrum peptide. For sleep-cycle or situational melatonin use, a melatonin product is a different tool.
Sources
- Araujo JA, de Rivera C, Ethier JL, et al. ANXITANE tablets reduce fear of human beings in a laboratory model of anxiety-related behavior. Journal of Veterinary Behavior. 2010;5(5):268–275. doi:10.1016/j.jveb.2010.02.003
- Pike AL, Horwitz DF, Lobprise H. An open-label prospective study of the use of L-theanine (Anxitane) in storm-sensitive client-owned dogs. Journal of Veterinary Behavior. 2015;10(4):324–331. doi:10.1016/j.jveb.2015.04.001
- U.S. Food & Drug Administration. Paws Off Xylitol; It’s Dangerous for Dogs. Consumer update. fda.gov
- VCA Animal Hospitals. Melatonin. Hamilton A, Gollakner R. vcahospitals.com
Veterinary disclaimer. This article is educational and is not a substitute for professional veterinary advice, diagnosis, or treatment. Melatonin and calming supplements are not approved drugs for treating anxiety or insomnia in dogs. Always talk to your veterinarian before starting any supplement, especially if your dog is pregnant, a puppy, older, on medication, or has a health condition. In a suspected poisoning, contact your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or the Pet Poison Helpline at (855) 764-7661.