Is Kirkland Signature Allergy Medicine Diphenhydramine HCI Antihistamine Vegetarian?
Why it's a maybe for vegetarian
- magnesium stearate
- polyethylene glycol
- dibasic calcium phosphate dihydrate
magnesium stearate
Dietitian noteMagnesium stearate (e572) refers to the magnesium salt of stearic acid. It may be derived from animal fat.
Note by Rhyan Geiger, RDN
Every flagged ingredient, explained
Notes and swaps for all 3 flagged ingredients, plus vegetarian products to buy instead.

Ingredients
Diphenhydramine HCI Antihistamine, Corn starch, D&C Red #27 Aluminum Lake, dibasic calcium phosphate dihydrate, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polyvinyl alcohol, silicon dioxide, stearic acid, talc, titanium dioxide.
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What is a Vegetarian diet?
A vegetarian diet eliminates meat, poultry, and fish but typically includes dairy, eggs, and plant-based foods. People adopt it for ethical, environmental, or health reasons. This diet emphasizes fruits, vegetables, legumes, grains, nuts, and seeds as key nutrient sources. Vegetarians often get protein from eggs, tofu, beans, and lentils. It can offer health benefits such as reduced risk of heart disease and improved weight management, though attention should be given to nutrients like iron, zinc, and vitamin B12. With proper planning, a vegetarian diet can be both nutritionally complete and sustainable.
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Often paired with Vegetarian
This product may or may not be vegan as it lists 3 ingredients that could derive from animals depending on the source. We recommend contacting the manufacturer directly to confirm.
Details →Yes! We believe this product is dairy free as there are no dairy ingredients listed on the label.
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