Vitamins and amino acids: distinguish diets from extra supplements
Prepared by TengRip · Sources checked: 2026-10-14
Menadione, vitamin D3, sodium selenite and DL-methionine can be nutrient sources. Check the full diet and additional intake rather than treating chemical names as poisons.
Other common names: 維生素與胺基酸：完整主食和額外補充品分開看, menadione, vitamin d3 supplement, sodium selenite, dl-methionine
Names and function
These are different nutrients. Complete-food labels can list several vitamin, mineral and amino-acid sources; WSAVA’s example includes vitamin D3, menadione and sodium selenite.
What the label can and cannot show
A list alone does not show deficiency, excess or overall adequacy. Check the complete-diet statement, life stage and nutritional analysis rather than deleting unfamiliar names.
A practical checking process
List all daily extras: pastes, multivitamins, urinary supplements and treats, including ingredients and amounts. Ask for typical analyses and check for duplicate nutrients across products with your vet.
Individual and evidence limits
Illness, growth, poor appetite and homemade feeding need a veterinary plan. A main-food ingredient name is not a supplement dose; do not add DL-methionine to alter urine acidity on your own.
Sources
- WSAVA — Interpreting Food Labels
- WSAVA — Guidelines on Selecting Pet Foods
- FDA — Animal Food Ingredients
For reference only, not medical advice. If poisoning is suspected, seek veterinary care immediately.
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