The 13 Healthiest Foods to Eat on a Keto Diet

What do Halle Berry, Lebron James, Kim Kardashian and Tim Tebow have in common? Well, aside from their seven-figure follower counts, they've all jumped on the keto diet bandwagon at one point or another.

The high-fat, ultra-low-carb regimen rose to fame for its fat-burning effects, although it was initially developed and used clinically in the treatment of epilepsy. Going keto isn't for everyone, and you'll want to consult your doctor or a dietitian before you dive head-first into this eating plan.

Once you've got the all-clear, prioritize the most nutritious foods to avoid making classic keto diet mistakes. Keep these must-have healthy keto diet foods in mind next time you head to the grocery store.

Avocado is a keto-diet staple and, given the nutrients this fruit packs (yes, avocado is a fruit), it's no surprise. Avocados are high in healthy, unsaturated fats, which can help lower LDL cholesterol if they replace saturated fats, according to Harvard Health Publishing.

This popular fruit is also high in fiber, a crucial nutrient that can help lower your risk of heart disease and diabetes, according to the Mayo Clinic. Fiber will also keep your digestion regular, which is an issue that many people face when following the keto diet.

Avocado carb counts, according to the USDA:

• Total c**arbs per serving:** 2.4 grams
• Net carbs per serving: 0.5 grams

Salmon is an excellent source of both protein and unsaturated fat, which can help you feel satiated, according to Frances Largeman-Roth, RDN. A 3-ounce serving of salmon provides about 17 grams of protein, with about 3.4 grams of fat, according to the USDA.

This fish is also high in omega-3 fatty acids, Largeman-Roth adds. These fats (which are also found in walnuts) are beneficial for your brain and eye health, yet most Americans don't get enough. Omega-3s can also help ease inflammation, according to the Mayo Clinic.

Salmon carb counts, according to the USDA:

• Total carbs per serving: 0 grams
• Net carbs per serving: 0 grams

In moderation, red meat is totally OK on a nutritious keto diet. Beef is high in protein and can add some variety to your weekly menu. But whenever possible, pick grass-fed cuts. Grass-fed beef (rather than grain-fed) is generally higher in omega-3 fatty acids and antioxidants like vitamin E, according to the Mayo Clinic.

Grass-fed beef carb counts, according to the USDA:

• Total carbs per serving: 0 grams
• Net carbs per serving: 0 grams

Keto diet or not, eggs are a great way to kick your morning off with a nutritional start. While eggs do contain cholesterol, having an egg a day is safe — yolk included — for just about everyone.

With fewer than 100 calories each, eggs are a great source of fat and protein, according to the USDA. They're also high in choline, a nutrient that helps your body digest fat and keeps your nervous system functioning properly, according to the National Institutes of Health (NIH).

Egg carb counts, according to the USDA:

• Total carbs per serving: 0.4 grams
• Net carbs per serving: 0 grams

If you're following a keto diet, there's no reason to go with low-fat cheese options. Instead, opt for a whole-milk feta. Feta is generally low in calories — with only about 75 per ounce — and full of nutrients like calcium and vitamin B12, according to the USDA.

Although it doesn't get as much attention as vitamins C or D, your body needs vitamin B12 for red blood cell formation, according to the NIH. This vitamin is also important for healthy brain function.

Feta cheese carb counts, according to the USDA:

• Total carbs per serving: 1.1 grams
• Net carbs per serving: 1.1 grams

Like cheese, yogurt made with whole milk is a great source of protein and fat — plus, it makes for a convenient snack, Largeman-Roth says.

Because it's fermented, yogurt is also a great source of probiotics, according to the Mayo Clinic. Probiotics are good-for-you bacteria that support your gut microbiome, which keeps digestion healthy and can even affect your mood.

Yogurt carb counts, according to the USDA:

• Total carbs per serving: 11.4 grams
• Net carbs per serving: 11.4 grams

Butter is a standard keto go-to and can fit into a healthy keto diet — especially in baked goods, Largeman-Roth says — but you'll need to eat it in moderation, as it contains saturated fats.

As with beef, consider choosing grass-fed or organic butter when possible. Grass-fed and organic varieties generally contain a higher ratio of healthy, unsaturated fats, according to an April 2017 study published in Foods. Plus, organic butter may also be higher in omega-3 fatty acids.

You can also try ghee, Largeman-Roth says, a clarified butter that's shelf-stable and free of lactose. Like butter, you'll want to use ghee in moderation, as it's high in calories and contains some saturated fats.

Butter carb counts, according to the USDA:

• Total carbs per serving: 0 grams
• Net carbs per serving: 0 grams

Coconut oil is used in plenty of keto recipes as a way to boost the fat content of your meals, according to Largeman-Roth. If you're new to the keto diet, you'll probably want to have a jar of coconut oil in your pantry.

But don't overload every meal with this keto-diet staple. "While these fats are fine in moderation, coconut oil contains saturated fat, which several studies show can lead to heart disease," Largeman-Roth says.

Coconut oil carb counts, according to the USDA:

• Total carbs per serving: 0 grams
• Net carbs per serving: 0 grams

With less than 4 grams of total carbs and about 20 grams of fat per serving, according to the USDA, pecans are definitely a keto-friendly nut.

Pecans are also a good source of zinc, providing about 12 percent of your daily recommended amount. Zinc supports your immune system and may even shorten the length of a cold, according to the Mayo Clinic.

Pecan carb counts, according to the USDA:

• Total carbs per serving: 3.9 grams
• Net carbs per serving: 1.2 grams

Along with nuts, seeds are another low-carb, high-fat snack that fit perfectly onto the list of healthy keto diet foods. Pine nuts — they're actually seeds, despite the name — have only about 5 grams of carbs and 17 grams of fat per ounce, according to the USDA.

A one-ounce serving will also supply about 16 percent of the magnesium you need. Magnesium supports healthy nerve and muscle function, according to the NIH, and also helps your body properly process protein.

Pine nut carb counts, according to the USDA:

• Total carbs per serving: 5.5 grams
• Net carbs per serving: 2.5 grams

While the keto diet is fat-dominant, you shouldn't neglect leafy, non-starchy vegetables. Leafy greens are not only low in carbs, but they provide plenty of essential nutrients that promote brain function and heart health.

Kale is definitely worth adding to your shopping cart when you're hunting for the healthiest keto foods, Largeman-Roth says. Kale is particularly high in vitamin K, which promotes healthy blood flow throughout the body, according to the NIH.

Kale carb counts, according to the USDA:

• Total carbs per serving: 0.7 grams
• Net carbs per serving: 0 grams

Brussels sprouts are another low-carb veggie option for people following a keto diet, Largeman-Roth says. Brussels sprouts are a great way to get some vitamin C into your diet, providing about 83 percent of the daily recommended value in one cup, according to the USDA.

We always hear that vitamin C can support healthy immune function. But it also helps your body restore other antioxidants, according to the NIH. And with fewer carbs that vitamin C-packed fruits, Brussels are a more keto-friendly way to get a dose of this important antioxidant.

Brussels Sprouts carb counts, according to the USDA:

• Total carbs per serving: 7.9 grams
• Net carbs per serving: 4.6 grams

While high-carb fruits like apples, oranges and bananas are pretty much off-limits on a keto diet, blueberries are low on the glycemic index, meaning they're low in sugar and carbs, according to the New Hanover Regional Medical Center.

Blueberries are also a good source of vitamin C and K, providing about 16 percent and 24 percent of your daily recommended amounts respectively, according to the USDA.

Blueberry carb counts, according to the USDA:

• Total carbs per serving: 21.4 grams
• Net carbs per serving: 17.8 grams