Nice list, but most of these are low hanging fruit and are already saturated with established players. The riches are still in the niches.
Example: instead of losing weight, I'd focus on helping people gain weight. It's a much smaller market, but there are lots of skinny guys wanting to gain weight in a healthy way (me included).
Example: instead of losing weight, I'd focus on helping people gain weight. It's a much smaller market, but there are lots of skinny guys wanting to gain weight in a healthy way (me included).