Answer
Food can reduce or vary its absorption. Taking it consistently before the first meal helps produce more predictable thyroid-hormone levels.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Levothyroxine 25micrograms/5ml Oral Solution — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.