First, the meaning is different.
1.health means: health; Medical treatment; Medical care; health
2. Health means health
Second, the usage is different.
1. Usage of health: The basic meaning can refer to both physical health (good or bad) and mental health, which is an uncountable noun. Sometimes it can also be used as a greeting, as an explanation of "I wish someone health", as an uncountable noun or a countable noun.
Example:
Fresh air and exercise are good for health.
Fresh air and exercise are good for health.
2.healthy usage: As an adjective, it basically means "healthy and strong", which means that people are in good physical and mental condition and rarely get sick. Extension can be interpreted as "(things) flourish and develop well."
Example:
Healthy shoots should form strong grafts.
Healthy shoots can grow into strong scions.
Third, the emphasis is different.
1. Health emphasis: indicates temporary health.
2. Health focus: refers to a long-term healthy state or process.