A four-week cycle can help you reserve a moment for care and review how it fits your day. It does not mean every cosmetic should be finished at the end. A guide has a calendar; a bottle has a volume and a rate of use.
What happens over 28 days
Take a 50 ml format and assume consumption of 0.5 ml daily. Over 28 days, that would use 14 ml and leave 36 ml, if use stayed constant. This is neither a measurement nor a recommended dose. It simply makes the two calendars easier to distinguish.
The end of a week does not change the amount remaining. It also does not require another complete set when only one item needs replacing.
A weekly review in three questions
- Use: on how many days did I actually use this product?
- Practice: did my chosen time fit, or should I move it?
- Bottle: what do I know about the amount left and when it was opened?
A blank box is still information. If a week changes, adjust the organisation before assuming that more product or a longer routine is required.
Replace one item at a time
WOOD brings together NAREL, ALBA and IRIA; EARTH brings together EIRA, LUA and RAIGAL. Their sizes differ. A cleanser, a cream and an oil need not run out together. Keep one row per bottle, so you can separate what you want to continue using from what you already have.
The MEIGALLUM guided programme is in preparation. Four weeks describes its proposed content structure; it does not set bottle duration or pre-empt access terms that remain unconfirmed.
A simple record to return to
Note the opening date, product and frequency. Add one short observation at the end of the week. The purpose is a personal reference for replacement decisions, rather than turning an estimate into a compulsory date.