You don’t have to spend a lot of money, follow a very strict diet, or eat only specific types of food to eat healthy. Healthy eating is not about skipping meals or certain nutrients. Healthy eating is not limited to certain types of food, like organic, gluten-free, or enriched food. It is not limited to certain patterns of eating, such as high protein.
It's trendy to think "food should be fuel" or that food is something that helps you lose (or, ahem, gain) weight. But thinking only in terms of number on the scale takes away a huge part of what eating is about: pleasure. "If you think of eating as something enjoyable and something you do without guilt or without judging yourself, and you stay active, you're less likely to overeat, have a better diet, and maintain any weight loss for the long haul," says Zied. It's true: feeling guilty about your food choices can undermine weight loss—and even pack on the pounds—while a celebratory mindset gives you more control over your diet and can thwart weight gain, found a 2014 study in the journal Appetite.
Calorie density. Junk foods are designed to convince your brain that it is getting nutrition, but to not fill you up. Receptors in your mouth and stomach tell your brain about the mixture of proteins, fats, and carbohydrates in a particular food, and how filling that food is for your body. Junk food provides just enough calories that your brain says, “Yes, this will give you some energy” but not so many calories that you think “That’s enough, I’m full.” The result is that you crave the food to begin with, but it takes quite some time to feel full from it.
According to US & Canadian Dietary Reference Intake guidelines, the protein Recommended Dietary Allowance (RDA) for adults is based on 0.8 grams protein per kilogram body weight. The recommendation is for sedentary and lightly active people. Scientific reviews can conclude that a high protein diet, when combined with exercise, will increase muscle mass and strength, or conclude the opposite. The International Olympic Committee recommends protein intake targets for both strength and endurance athletes at about 1.2-1.8 g/kg body mass per day. One review proposed a maximum daily protein intake of approximately 25% of energy requirements, i.e., approximately 2.0 to 2.5 g/kg.
Some people choose their cheat days to actually be cheat meals. So, one day they could have a cheat breakfast (i.e. pancakes), then a cheat lunch on another day and then a cheat dinner or dessert, and so on. While this works for some people, I found this allows me too much flexibility in my eating schedule and I start to cheat more and more because I justify it’s a cheat meal. Rather, on a cheat day, I have the whole day to get it out of my system and then move on. And it’s pretty darn glorious, let me tell you.
When it comes to omega-3 fatty acids (omega = ω) such as EPA and DHA, children may be given cod liver oil and served fish and/or other seafood 2-3 times a week. It is important to check the dose of vitamin A supplied, as it can be toxic in high doses, especially for children. One problem with cod liver oil today is that vitamin D has been removed during processing, thus changing the natural ratio of the two vitamins so that we ingest relatively too much of vitamin A. 
You don't have to hunt and skin your supper, but if your chicken has been molded into a nugget, who knows what you're really chewing. And when you choose meat that's been processed into sausage, strips or slices, you're downing sodium and preservatives instead of healthy nutrients, says Adam Drewnowski, Ph.D., director of the nutritional sciences program at the University of Washington at Seattle. Stick to unfussed-with cuts straight from the butcher.
The United States Food and Drug Administration, Office of Inspections, Compliance, Enforcement, and Criminal Investigations, monitors supplement products for accuracy in advertising and labeling, and when finding violations, warns manufacturers of impending enforcement action, including search and seizure, injunction, and/or financial penalties, such as for a Maine supplement company in 2017. The United States Federal Trade Commission, which litigates against deceptive advertising, established a consumer center to assist reports of false health claims in product advertising for dietary supplements, and, in 2017, successfully sued nine manufacturers for deceptive advertising of dietary supplements.
In 2015, the Australian Government's Department of Health published the results of a review of herbal supplements to determine if any were suitable for coverage by health insurance. Establishing guidelines to assess safety and efficacy of botanical supplement products, the European Medicines Agency provided criteria for evaluating and grading the quality of clinical research in preparing monographs about herbal supplements. In the United States, the National Center for Complementary and Integrative Health of the National Institutes of Health provides fact sheets evaluating the safety, potential effectiveness and side effects of many botanical products.