Nutritionist Cynthia Sass shares her five rules for putting on weight while optimizing health (because yes, there's an actual science to it).

By Cynthia Sass
October 05, 2011

Most of the people I meet ask for my advice about how to lose weight, but some of my clients are actually trying to pack on pounds, and it's not as simple as it may seem. Every once in a while I'll read about an actor who had to gain weight for a role, and they talk about how awesome it was to down pints of ice cream, pasta, bread, cheeseburgers, and doughnuts. That's one way to gain weight, but it's not the best way. (Related: More Women Are Trying to Gain Weight Through Diet and Exercise)

I sometimes work with clients who've lost weight due to dental surgery, a digestive problem, stress, or an illness, and are trying to get back to a healthy weight. And as a sports nutritionist, I also work with pro athletes who tend to lose weight over the course of a grueling season. In all of these cases, the goal is to gain weight while optimizing health-and there's a science to it. After all, the old phrase "you are what you eat" is absolutely true-nutrients from food are literally the raw materials your body uses to construct new cells. A junk food–filled diet devoid of nutrients doesn't give your body much to work with. I always say it's like constructing a house with cardboard and tape instead of bricks and mortar. In other words, it's not just about calories.

Here are five "good gain" rules I share with my clients:

1. Don't let more than four hours go by without eating.

Your body needs a continuous supply of energy since it's like an engine that's always turned on (your heart is always beating, blood is circulating, your brain and muscles are working). When you skip meals, you deprive your body of the fuel it needs to keep going. The result is a dip into your energy piggy bank, which unfortunately includes muscle mass. The best way to prevent your body from losing any important tissue is to eat regular meals, spaced about three to five hours apart. If you're trying to gain new muscle tissue, meal timing is especially critical. Sometimes my clients tell me they "eat all the time," but when they actually start keeping a food journal they realize just how erratic their patterns are. Consistency is key. (Related: The Muscle-Building Foods to Eat for More Definition)

2. Eat several foods at once.

Always aim for at least three food groups. Instead of just a banana or a handful of nuts, top a few slices of whole-grain toast with almond butter and banana slices (which, BTW, is Khloé Kardashian's go-to post-workout breakfast), along with a glass of organic skim milk or a milk substitute. A wider variety provides your body with a broader spectrum of nutrients to work with throughout the day.

3. Eat healthy, but dense foods.

The best way to rack up extra nutrition without having to eat huge quantities of food or resort to junk is to choose nutrient-rich foods that pack a lot of carbohydrates, protein, or fat into a small serving. Dried fruit is a great example. With the water removed, the portion shrinks by about 75 percent, so a cup of grapes turns into a quarter cup of raisins. Just be sure to look for dried fruits with no added sugar or preservatives. For another nourishing, power-packed snack, fold rolled oats, dark chocolate chips, and minced dried fruit into almond butter. Spoon out portions about the diameter of a quarter, roll them into little balls, wrap in waxed paper, and snack on them throughout the day. (Related: 3 Easy-to-Make Protein Ball Recipes That Will Replace Those Boring Bars)

4. Drink your food.

Liquids aren't as filling as solid food, so when you're trying to gain weight, they can add nutrition without making you feel stuffed or bloated. Good choices include 100 percent fruit juice, organic skim milk or milk alternatives (such as organic soy, or hemp), and smoothies. Smoothies are ideal (over milkshakes) because you can bolster them with all kinds of good stuff, like wheat germ, nut butter, carrot juice, and protein powder. (Try Emma Stone's high-calorie, post-workout smoothie for gaining lean muscle.)

5. Eat right before bed.

A lot of our healing, repair, and regeneration takes place while we sleep. It's like rush hour for building muscle and lean tissue, so eating a healthy snack right before bed ensures a fresh supply of nutrients that are available to "go to work" inside the body. A great option that won't leave you feeling stuffed might be a small bowl of pasta salad made with 100 percent whole-grain pasta (wheat or a gluten-free alternative), vinaigrette made with extra-virgin olive oil, chopped or shredded veggies, and a lean protein such as beans, chopped chicken breast, or an organic crumbled cheese.

Comments (7)

January 23, 2020
That is very fascinating. Many thanks for providing these details. Dietitian In Delhi
March 10, 2019
Hi, my name is Kate and I would like to share my story. A few years ago, my body was full of cellulite. I used to be disgusted at how much cellulite I had. But, with patience and determination (and a lot of research!), I managed to almost eliminate it. All it took, was the right exercise program and a way to manipulate estrogen metabolism. Read my story here ...==>
October 22, 2018
Presently we all are running after a way to lose weight, as it has become a top priority for few of us. However, to get enough and suitable weight naturally is equally a big challenge. You probably try ardently to put on weight to maintain your health and a fit body. However, sometimes you come across the failure................for more info visit:
October 12, 2018
Nice post. I’m new here .and I get something new .i think it would be very helpful to should sharing more tips about gain weight. How to Gain Weight Fast and Safely
September 15, 2018
Fantastic news, well done you! White jeans brilliant! It is an amazing feeling isn’t it? I am down 6lb and 3inches from my waist and this is week 4 for me, but people are already saying how good I look and I am into size 12 (UK size) trousers. thanks to the 2-week diet, watch the video here: =>
July 23, 2018
I was very cynical when a friend of mine suggested that a paleo diet worked for her but she told me that she bought a book that has good recipes that actually doesn't taste bad and she sent me the information, a few months later I thought I would give it a try since I could definitely see the difference it made on her and I have to say after trying it for about two months now it really seems to be working, I would definitely say that it is worth the 13 bucks I spent. I will leave the link that she sent me just in case anyone is interested in trying it too:
May 19, 2018
I am sharing my experience, Myself and my husband used Brain Diet weight loss guide it helped us to reduce more than 16 kg within few weeks, It’s working for both men & women. It’s really awesome one!!! No words to say about it. Watch the video here: