If your minimum is 1700 and you ate 1500 today, that's probably not an issue. It may not even be an issue if you eat 1500 fairly regularly.
If your minimum is 1200 and you eat less than that on a regular basis, that IS an issue.
Also, if your minimum is already unrealistically low because you've told the site you want impossibly fast weight loss for your current weight, that would be a problem too. Eg if you have 10lbs to lose, you cannot lose that at 2lb/week, even though the site lets you set it as a goal. If you had a range like 1300-1600 and a goal that was simply too aggressive, it wouldn't really matter if you did get still at least 1200 calories, the range is too low anyway so eating below it is definitely an issue.
Ultimately - you might have to share more info.
How much do you weigh now, what's your goal weight, what date is your goal date, how many calories is your minimum in your Spark range now, how many do you eat, and how often (like, pretty much every day, or once a week)?
Did you meet ALL of your other minimums? Did you get 100% of your calcium? Did you get at least 25g of fiber? Did you meet at least the low end of your range for carbs, fat, and protein? Did you eat at least 5 servings of vegetables and/or fruit?
If you got all of the nutrients you need, from food (supplements don't count), then you don't need more food. But women can rarely meet all their targets with less than about 1300-1400 calories. (Even expert dietitians can't do it with less than 1200.)
Less than 1200 for a female is a bad idea because it's very hard for most people to get in all the nutrients they need eating less than that. Also, eating too far below your BMR for an extended amount of time can make your body think food is scarce and start to slow down your metabolism in order to be able to operate more efficiently on less food (what people call starvation mode).
Healthy but calorie dense foods can be used to up your calories....good quick and easy options are nuts, avocados and bananas.
Also make sure that your calories are calculated correctly. If you have a lot of weight to lose you may want to ask one of the SP experts what range you should be using because the calculator isn't very accurate for those trying to lose a lot because it's calculated based on averages and tends to end up giving higher than necessary numbers for some people.
Also, is okay if it happens sometimes but if you find yourself too low every day or most days then figure out how to eat more.
SparkPeople, SparkCoach, SparkPages, SparkPoints, SparkDiet, SparkAmerica, SparkRecipes, DailySpark, and other marks are trademarks of SparkPeople, Inc. All Rights Reserved.
SPARKPEOPLE is a registered trademark of SparkPeople, Inc. in the United States, European Union, Canada, and Australia. All rights reserved.