31 Aug Should I see a dietitian or nutritionist to gain weight?
When people talk about nutrition, the conversation tends to turn to weight loss. Our feeds are filled with ads, quick-fixes, fad diets, “before and after” pictures, and diet hacks promising the ideal body, flat tummy, and thin, thin, thin. As dietitians who practice inclusive nutrition care and HAES (Health At Every Size) philosophy, much of our work is educating people about what healthy is. And, quite simply, some people struggle to put on the pounds. Whether due to illness, recovering from an eating disorder, a high metabolism, unexplained weight loss (go to the doctor!), or if you’re engaging in a new sport and can’t seem to keep on the pounds, weight gain is an important health goal.
If you’re wondering whether you should see a dietitian or nutritionist to help you gain weight, the short answer is: yes, absolutely. And here’s why.
What is the difference between a Dietitian and a Nutritionist?
First, a quick clarification. While the terms “dietitian” and “nutritionist” are sometimes used interchangeably, there’s a big difference. A Registered Dietitian Nutritionist (RDN) is a licensed healthcare professional who has completed a four-year degree in nutrition science, a supervised internship, and passed a national exam. They’re qualified to provide Medical Nutrition Therapy (MNT) — nutrition counseling that supports health conditions like eating disorders, digestive issues, chronic disease (like diabetes, metabolic syndrome), cancer support, cardiovascular nutrition therapy, weight-related concerns, and much, much more. They are licensed to work in hospital settings, clinics, schools, and their own dietitian practices.
A “nutritionist” on the other hand, well, anyone can technically call themselves one. This is not a technical healthcare title, and that can be confusing. Someone who works in a gym that’s taken an online course can call themself nutritionist. Likewise, someone who has a degree in nutrition sciences or a related field, but that hasn’t gone through the certification requirements, can call themself nutritionist. That’s not to say there aren’t knowledgeable nutritionists out there, but if you’re looking to gain weight for medical or recovery reasons, it’s best to work with a credentialed dietitian. The Academy of Nutrition and Dietetics has long emphasized the importance of evidence-based, individualized nutrition care — and that’s exactly what an RDN can provide.
Why Would Someone Need to Gain Weight?
Weight gain might be necessary for a number of reasons:
Recovery from an eating disorder:
Weight restoration is often a crucial part of healing from conditions like anorexia nervosa or ARFID. RDNs trained in eating disorder recovery understand that gaining weight isn’t just about eating more — it’s about re-learning how to nourish your body with compassion and consistency.
After illness or hospitalization:
Extended illness, surgery, or conditions like cancer can cause muscle wasting and unintended weight loss. Regaining weight is key to rebuilding strength and immunity.
Naturally thin body types:
Some people are genetically predisposed to be lean. And that’s okay! But if you’re struggling with low energy, irregular periods, or difficulty staying warm — all signs that your body might not be getting enough — a dietitian from our team can help assess whether weight gain could improve your health.
High metabolism or sports nutrition:
Some people simply burn calories faster or need more fuel due to their activity level, as is often the case with athletes. Quite simply, someone engaged in sports like cycling, running, swimming, wrestling, and more will have greater energy needs (calorie needs) than someone who is more sedentary. Without an individualized diet plan, an athlete is more at risk to injury, energy dips, and poor performance, as well as lengthier recovery times. Eating enough to keep up isn’t always easy, and that’s where structured guidance can help.
What Do Dietitians Recommend for Healthy Weight Gain?
Healthy weight gain isn’t about scarfing down pizza and milkshakes (although, hey — those can have a place!). It’s about sustainable, nutrient-dense eating that supports muscle, metabolic function, and overall wellness.
We work with patients from New York and all over the country, providing them with individualized support to help them gain weight. Though there is no one-size-fits-all program, here are some dietitian recommendations to gain weight:
-
Frequent meals and snacks: Eating every 2–4 hours keeps energy intake consistent and manageable.
-
Energy-dense foods: Think nut butters, avocado, olive oil, full-fat dairy, eggs, trail mix, smoothies with added protein or healthy fats.
-
Resistance training: Building muscle mass can support healthy weight gain and overall strength.
-
Addressing any digestive issues: If you’re bloated or uncomfortable after meals, an RDN can help pinpoint triggers or recommend foods that are easier to tolerate.
What Does Medical Nutrition Therapy (MNT) for Weight Gain Look Like?
MNT for weight gain is personalized — there’s no one-size-fits-all meal plan. An RDN will start by assessing your medical history, current eating patterns, and any symptoms you’re experiencing. From there, they’ll help you set realistic goals and create a structured eating plan that works with your lifestyle, not against it.
It’s also not just about food. A good dietitian will help you navigate diet culture, challenge the fear of weight gain (especially common in recovery), and help you reconnect with your body’s needs. And let’s be real — weight gain can be emotionally hard in a world that celebrates thinness. Health is about more than weight. It’s about nourishment, function, and quality of life.
Some people are naturally thin. That doesn’t automatically mean they’re unhealthy, just like being in a larger body doesn’t automatically mean someone’s unwell. But if your body is telling you it needs more — through fatigue, hair loss, cold hands, or just a gut feeling — listen.
Seeing a dietitian isn’t just for those trying to lose weight or manage chronic conditions. It’s also for those of us trying to feel more whole, to come back from a tough season, or to simply give our bodies what they need to thrive.
So yes — if you’re thinking about gaining weight, working with a registered dietitian could be one of the most powerful steps you take toward healing and strength. You don’t have to do this alone. And you shouldn’t. Contact us to get started.
Healthy Snacks to Reach Weight Gain Goals:
Start to feel healthier and more energetic, one bite at a time. Here are some healthy, budget-friendly, and easy-to-prepare snacks to keep your energy and calorie levels up during the day:
Nut Butter on Whole Grain Toast or Crackers (Add banana slices or honey for extra calories and flavor.)
Greek Yogurt with Granola & Berries (Choose full-fat yogurt for more calories and healthy fats.)
Trail Mix (Mix nuts, seeds, dried fruit, dark chocolate chips, and coconut flakes.)
Avocado on whole-wheat toast (Drizzle with olive oil and sprinkle with sea salt or hemp seeds.)
Smoothies with Add-ins (Blend whole milk or oat milk, banana, peanut butter, protein powder, and flaxseed.)
Cottage Cheese with Pineapple or Nut Butter (High in protein and customizable for sweet or savory.)
Hard-Boiled Eggs with Crackers and Cheese (A great protein-fat-carb combo for lasting energy.)
Hummus with Whole Grain Pita and Olives (Add a tahini for extra calories and creaminess — use garbanzo beans or white beans.)
Chia Pudding Made with Coconut Milk (Take a 1/4 cup of chia mixed with coconut milk (1 C) and Greek yogurt (1/2 C) and top with nuts, granola, or fresh fruits.)
Energy Bites (Made from oats, nut butter, honey, and add-ins like chocolate chips or seeds.)