Here's how to view / enter / edit health info (e.g., nutrition, sleep, vitals, etc.) to the Health app on your iPhone.

The Health app gives an easy-to-read dashboard of your health and fitness data.

The Health app requires iOS 8 or later on an iPhone 4S or later.

From the Home screen, tap

Health

Tap

Health Data

Tap the health data type then view, enter or select the appropriate health data into the applicable fields.

All

Access all the health data types on one screen.

Body Measurements

Fitness

Me

Nutrition

Reproductive Health

Results

Sleep

Vitals