This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. comparative form of healthy: more healthy

adj. improved in health or physical condition

"Many in the medical community are shifting their focus off of weight to advocate healthier eating and increased activity, and are finding that even though these changes do not result in fat people becoming *thin*, they do result in fat people becoming *healthier* as indicated improvements in BP, blood sugar, RHR, cholesterol levels, etc."

better   

stealthier    wealthier