The 90-Day Supplement Reset
Cycle supplements, pause, and reassess whether they still help
- Difficulty
- Easy
- Time to result
- ~months to results
- Steps
- 5
- Confidence
- 95%
The 90-Day Supplement Reset converts passive daily supplementation into a recurring experiment. Start by naming exactly why each supplement is being taken and what change would count as benefit. Remove items that have no clear purpose, then observe the remaining routine for roughly 90 days. At the review point, pause for two to four weeks where medically appropriate. Watch whether the original symptom remains improved, returns, or never changed; use blood testing when the supplement affects a measurable marker such as vitamin D. Then make a deliberate choice to restart, switch, or stop. The mechanism is contrast: continuous use makes it hard to know whether a supplement still matters, while a bounded pause creates information. The rule also limits wasted money and reduces the risk of carrying an outdated dose forward for years.
Origin
Pelz says patients used to arrive with bags of supplements they could not explain. Her clinic removed unclear products and adopted a golden rule of switching or reassessing supplements every 90 days.
Core principles
- 01Know the purpose of every supplement
- 02Do not continue a routine only from habit
- 03Use a fixed review interval
- 04Pause long enough to observe the difference
- 05Restart only when evidence supports it
How to run it
- 1
State the job
Write down why each supplement is being used and the symptom, behavior, or marker it is intended to change. If no purpose can be stated, remove it from the self-directed routine.
Pro tip Use one line per supplement: purpose, dose, start date, and target measure.
Watch out Do not discontinue prescribed treatment without the clinician who manages it.
- 2
Run the 90-day block
Use the supplement consistently for a bounded period and track the intended result. Avoid judging it through unrelated changes.
Pro tip Record a baseline before the block starts.
Watch out Stop and seek advice if adverse effects occur.
- 3
Take a reset break
After about 90 days, pause for two to four weeks when it is safe to do so. The break reveals whether the benefit persists without continued use.
Pro tip Change as little else as practical during the observation window.
Watch out Some deficiencies and medical conditions require ongoing treatment rather than a self-directed break.
- 4
Reassess the evidence
Compare symptoms and relevant measurements with the baseline and the on-supplement period. Retest blood markers when the dose can move a measurable level too high or low.
Pro tip Use the same test and conditions when comparing lab values.
Watch out Feeling different does not prove causation when several routines changed together.
- 5
Restart, switch, or stop
Resume the supplement if the target problem clearly returns and improves again, switch when the original intervention no longer helps, or stop when no need remains. Set the next review date immediately.
Watch out Do not let a temporary experiment quietly become another indefinite habit.
In the wild
Pelz describes starting vitamin D after a low result, then discovering on later blood work that the level had become too high. She stopped, tried relying on sunlight, retested, found the level too low again, and resumed supplementation.
→ Repeated testing replaced a fixed daily dose with an evidence-led adjustment.
A person takes a probiotic for bloating and improved bowel movements. After 90 days, they pause for several weeks and track whether symptoms return; if they do, they retry it and compare the result instead of assuming permanent need.
→ The pause clarifies whether continued spending and use are justified.
Common mistakes
Taking products without a purpose
A recommendation from a friend or social post is not a target outcome. Every product needs a defined job.
Skipping the off-period
Without a bounded pause, it is difficult to observe whether the supplement still changes anything.
Ignoring measurable excess
A dose that corrected a low marker can later push it too high. Retest instead of carrying the original instruction forward indefinitely.
Is it for you?
Best for
It is best for people with stable supplement routines who want a recurring evidence-based review.
Not ideal for
It is not ideal for prescribed treatments or clinician-directed deficiency correction without medical supervision.
From the transcript
“So, you take a supplement to make a difference in your body.”
“So, I my golden rule for me and my patients is every 90 days, we switch th those supplements.”
“if you went on a supplement, you noticed a difference, and then you stopped noticing a difference, get off of it for a couple of…”
From the episode
Episode 511: Dr. Mindy Pelz: Fix Your Metabolism with the Right Type of Fast
Dr. Mindy Pelz