Supplement timing planner
Levothyroxine needs an empty stomach and four hours of clearance from calcium and iron. Fat-soluble vitamins need a meal with fat. Magnesium belongs at night and B vitamins in the morning. This planner applies 40 sourced timing rules across your whole stack, then flags any pair your arrangement has not separated far enough.
Build your day
6 items scheduled
Include medications and foods — they constrain timing most.
At a glance
- Items scheduled6
- Windows used3
- Spacing warnings1
- Off-window items0
- Duplicate nutrients0
The window logic
- Morning
On waking to late morning
- Midday
Lunch and early afternoon
- Evening
Dinner to early night
- Pre-bed
30-60 minutes before sleep
Spacing conflicts
- Levothyroxine × Iron bisglycinate0h apart, needs 4h
Levothyroxine and Iron bisglycinate are about 0h apart but need 4h. Move one of them to a different part of the day.
Your timeline
Windows run from waking to bedtime. Items that need an empty stomach sit before the first meal.
Morning
On waking to late morning- B-complex1 capsulewith food
B vitamins drive energy metabolism and can be activating. Take them in the morning with food to blunt any nausea, and never late in the day.
- Iron bisglycinate18-27 mg elementalempty stomach
Non-heme iron absorbs best on an empty stomach with vitamin C. Coffee, tea and calcium can halve absorption, so keep them two hours away.
- Levothyroxineper prescriptionempty stomach
Levothyroxine needs an empty stomach and gastric acid for full absorption. Take it 30-60 minutes before breakfast with plain water, and keep calcium, iron and coffee at least 4 hours away.
- Vitamin C500-1000 mgflexible
Vitamin C is best split across the day in 250-500 mg doses because absorption saturates. Take a dose with iron to multiply uptake.
Midday
Lunch and early afternoon- Calcium citrate500 mg elementalwith food
Calcium absorbs better with food and in doses at or below 500 mg. Take it with vitamin D3, and separate it from iron, zinc and thyroid medication.
Evening
Dinner to early night- Magnesium glycinate200-400 mg elementalflexible
Magnesium supports parasympathetic tone and muscle relaxation, so evening dosing also helps sleep. Keep it two hours from antibiotics and thyroid medication.
Pre-bed
30-60 minutes before sleepNothing scheduled in this window.
Deliberate pairings
These items are more effective taken together, so the schedule places them in the same window.
- Iron bisglycinate + Vitamin C
Take 100-500 mg vitamin C with your iron dose. This is the single most effective pairing for iron.
Windows, not exact times.
Exact clock times are brittle — nobody eats at the same minute every day. The planner works in four windows and checks whether your arrangement satisfies each rule's minimum interval. Then it tells you which item to move, not just that something is wrong.