Truly Personalized Nutrition
Build nutrition choices from causes, context, goals, and current data
- Difficulty
- Advanced
- Time to result
- ~months to results
- Steps
- 6
- Confidence
- 97%
Truly Personalized Nutrition treats every measurement as one input in a causal investigation rather than a direct prescription. Start with what the person eats and avoids, then ask why those choices occur. Add symptoms, relevant blood work, optional genetics, goals, and practical constraints. Investigate multiple explanations for abnormal markers before choosing an intervention; low iron, for example, can have causes that an iron pill would conceal rather than solve. Convert the evidence into several workable choices across food and supplements, then monitor whether the selected plan changes the intended outcome. The mechanism is context plus cause plus measurement: richer inputs identify the likely constraint, an individually workable intervention addresses it, and follow-up data shows whether it actually worked.
Origin
Ashley Koff contrasts her 25 years of personalized nutrition practice with services that turn a short quiz or isolated blood test directly into a supplement sale.
Core principles
- 01A result is a clue, not a diagnosis
- 02Ask why before prescribing what
- 03Combine intake, behavior, goals, and biomarkers
- 04Offer choices the person can sustain
- 05Retest instead of assuming success
How to run it
- 1
Map current intake
Document what the person consumes, avoids, and repeats. Include supplements rather than treating them as separate from the nutrition picture.
Pro tip Look for patterns across an ordinary day, not an idealized day.
Watch out A recommendation made without knowing current intake can duplicate or overload nutrients.
- 2
Ask why
Identify the motives, constraints, symptoms, preferences, and routines behind each important choice.
Pro tip Ask what makes a choice convenient or sustainable.
Watch out Knowing only what someone eats does not explain what they can realistically change.
- 3
Add personal evidence
Review relevant labs, symptoms, goals, and, when useful and affordable, genetics. Treat every marker as evidence requiring interpretation.
Pro tip Use several related markers when one surface-level value has multiple causes.
Watch out Do not translate one low marker directly into one supplement.
- 4
Find the likely cause
Generate plausible reasons for the result and investigate which fits the person's full context. Address underlying health issues before masking a marker.
Pro tip Ask what else would be true if each explanation were correct.
Watch out Supplementing the number can miss the health issue producing it.
- 5
Design workable choices
Offer food, supplement, or combined routes that serve the goal and fit the person's preferences and life.
Pro tip Let the person choose among options that meet the same nutritional objective.
Watch out A technically optimal plan that cannot be followed is not personalized.
- 6
Measure and revise
Set a follow-up point and evaluate whether the intervention changed the intended marker, symptom, or behavior. Adjust from the new evidence.
Pro tip Define the result and review date before starting.
Watch out Do not equate taking something with benefiting from it.
In the wild
A client has a low iron marker. Instead of automatically adding iron, the practitioner reviews five related blood measures, food intake, symptoms, and possible causes. The plan addresses the explanation supported by the combined evidence and schedules follow-up testing.
→ The intervention targets the likely cause rather than merely changing one number.
Testing identifies a nutrient insufficiency in someone whose medication suppresses appetite. The practitioner explains the requirement, then offers a food plan, a supplement option, or a combination based on what the person can consume.
→ The client gets a feasible plan tied to measured need.
Common mistakes
Prescribing from one marker
A single lab value can have many causes. Treating the value directly may hide the underlying problem.
Ignoring current choices
Genetic or blood data alone does not show what a person already consumes or why they consume it.
Skipping follow-up
Without a defined reassessment, nobody knows whether the personalized intervention helped.
Is it for you?
Best for
People making nutrition decisions from symptoms, labs, genetics, or supplement recommendations.
Not ideal for
Anyone seeking a universal prescription without sharing behavior, context, or follow-up data.
From the transcript
“I don't just need to ask what are you eating I need to ask why because if I don't know the why behind what you're…”
“true personalization looks at what you're consuming what you're not consuming what those levels are and maybe if we have the option which you know…”
“if I just have information on who you are and what your body needs today I can design a plan to start to and I…”
From the episode
Episode 303: Ashley Koff: Personalized Nutrition Expert on Diet, Nutrition, and Supplements
Ashley Koff