I’ve been eating on average 1000 calories a day but feel fine (not hungry, tired, moody). Lost 30 lbs over 6 weeks. Is this healthy?

Unhealthy WT loss. Hi, no, such low daily calorie intake (1000 cal/day) and very quick large weight loss is not healthy. It would be recommended that you pursue weight loss always under the guidance of a certified nutritionist/dietitian, adjusted to your needs, within healthy requirement range, and keeping in mind that healthy weight loss it is a progressive process.