Field notes
from the body.
Reading your bloodwork alongside user-authorized fitness and wellness data from Apple Health, Depth's only current health-data connection, and what the signals can tell you on one timeline.
Approach 
How to combine wearable data with blood work
How to compare wearable data with blood work, plus how Depth reads supported fitness and wellness records from Apple Health.
Raghav Dua Latest
Science Why doctors don't test fasting insulin
Why don't doctors recommend fasting insulin tests? The honest answer: guidelines, reimbursement, and assay variability target glucose and HbA1c instead.
Prithvish Baidya 
Science Why don't doctors test ApoB yet?
Why don't doctors test ApoB? The standard panel, guideline lag, and Medicare's LDL-C rules explain the gap, and why a single ApoB draw still matters.
Prithvish Baidya 
Product How to choose an at-home longevity blood test
A neutral guide to comparing at-home blood tests for longevity markers: what to ask about the panel, sample collection, repeat testing, and results.
Prithvish Baidya 
Product Introducing the Founders Edition
The first 1,000 people to join Depth become Founders: a numbered card, a free Recap on day one, and first access to everything that ships after.
Raghav Dua 
Product AI health coach for your wearable data
How an AI health coach can compare wearable signals, and how Depth currently reads supported fitness and wellness records from Apple Health.
Raghav Dua 
Product An app for blood biomarkers and fitness-tracker data
What to look for in an app for labs and fitness-tracker data, and how Depth currently uses supported Apple Health records.
Raghav Dua Science 6
See all Science Why doctors don't test fasting insulin
Why don't doctors recommend fasting insulin tests? The honest answer: guidelines, reimbursement, and assay variability target glucose and HbA1c instead.
Prithvish Baidya Science Why don't doctors test ApoB yet?
Why don't doctors test ApoB? The standard panel, guideline lag, and Medicare's LDL-C rules explain the gap, and why a single ApoB draw still matters.
Prithvish Baidya 
Science Why low ferritin drains you when sleep is good
Wondering why your ferritin is low but sleep is good and you're still tired? Low iron stores sap energy before anemia shows. The thresholds and what to do.
Prithvish Baidya Product 7
See all Product How to choose an at-home longevity blood test
A neutral guide to comparing at-home blood tests for longevity markers: what to ask about the panel, sample collection, repeat testing, and results.
Prithvish Baidya Product Introducing the Founders Edition
The first 1,000 people to join Depth become Founders: a numbered card, a free Recap on day one, and first access to everything that ships after.
Raghav Dua Product AI health coach for your wearable data
How an AI health coach can compare wearable signals, and how Depth currently reads supported fitness and wellness records from Apple Health.
Raghav Dua Approach 3
See all
Approach What health trends add between annual physicals
An annual physical is one important check-in. Fitness and wellness trends between visits can add context to the next conversation with your clinician.
Raghav Dua 
Approach Your body is a time series: reading labs and wearables over time
Reading your labs and wearables one at a time treats your body as a still photo. Read as a trend over time, the signal is in the motion between frames.
Prithvish Baidya 
Approach Normal HbA1c but rising? Why the trend beats the threshold
A threshold tells you when you've already crossed a line. A trend tells you you're heading for it, while there's still time to turn.
Raghav Dua