Exploring the Link Between Weight Gain and Relationship Health: Insights from Experts
“When a woman feels safe with her partner, the level of cortisol—the body’s primary stress hormone—drops. At the same time, the production of oxytocin and serotonin increases. This shift helps the body relax, conserve energy, and prepare for potential pregnancy. During this process, metabolism slows and appetite often rises. These changes are completely natural,” says Kate Novaya, an integrative doctor and self-described 'biohacker' who goes by @doctor.novik on Instagram.
Kate’s now-viral Instagram post, where she claimed that women tend to gain weight in healthy relationships, has triggered a fierce online debate. She further suggested that if a woman loses a significant amount of weight during a relationship, there’s a 90% chance she may not be in a secure or happy one. While some followers agreed with her perspective, others vehemently disagreed, arguing the opposite may be true.
As comfort and intimacy build over time, so do shared meals, movie-night snacks, and the occasional indulgence. Food often becomes a shared love language—ordering extra fries simply because your partner wants them isn’t uncommon. But can your weight really reveal the health of your relationship?
“Happy, secure couples often change their lifestyle habits,” he explains. “They might eat out more, consume comfort food, or exercise less. It’s not universal, but it’s backed by research.”
Singh references the “relationship weight gain” theory: people in committed, stable partnerships are typically less concerned with physical appearance than when they were single. Feeling emotionally secure may lead to a more relaxed attitude toward fitness and food.
Dining Out More: Couples explore new cuisines, dine out frequently, and share high-calorie meals—all of which contribute to weight gain.
Increased Alcohol Intake: Socializing together may include drinking alcohol, which adds extra calories.
Less Physical Activity: Time once spent at the gym may now be spent binge-watching shows together or lounging at home.
Adopting Partner’s Habits: If one partner skips breakfast or eats less nutritious food, the other may adjust their eating patterns to match, affecting diet quality.
Dr. Rajiv Kovil, head of diabetology at Zandra Healthcare and a weight loss specialist, agrees that new relationships may lead to weight gain, but emphasizes that couples must actively work toward maintaining a healthy lifestyle.
“When you’re in a secure, happy relationship, your body produces feel-good hormones like oxytocin, dopamine, and serotonin,” Dr. Kovil explains. “These reduce stress and emotional eating. On the other hand, toxic or stressful relationships elevate cortisol, which increases cravings, fat storage, and ultimately leads to weight gain.”
Experts agree that a temporary weight increase is normal in a new relationship. But if weight gain persists—despite a balanced diet and regular exercise—it may signal elevated stress levels due to relationship issues. That’s where the now-popular phrase, “If your body is rejecting your partner,” begins to make sense.
A study involving over 8,000 participants found that, on average, married women gained 24 pounds within the first five years of marriage. Women cohabiting without marriage gained about 8 kg, while those in committed but non-cohabiting relationships gained roughly 6.8 kg.
Men weren’t exempt either. Interestingly, researchers noted little difference in weight gain between married men and those simply living with their partners.
The study concluded that happy couples are often less motivated to maintain a certain weight because they’re no longer seeking a partner. Emotional security lowers the urgency to maintain external appearances.
If you’re eating well and exercising but still gaining weight, your relationship could be contributing to elevated cortisol levels. In such cases, it may be time to look beyond the scale and reassess the emotional dynamics of your partnership.
For couples, the solution lies in balance: maintain healthy eating, stay active together, and create an environment where both physical and emotional well-being are prioritized.
Kate’s now-viral Instagram post, where she claimed that women tend to gain weight in healthy relationships, has triggered a fierce online debate. She further suggested that if a woman loses a significant amount of weight during a relationship, there’s a 90% chance she may not be in a secure or happy one. While some followers agreed with her perspective, others vehemently disagreed, arguing the opposite may be true.
Relationship Weight Gain: A Common Phenomenon
Kate’s post touched a nerve because it highlights a widely observed yet rarely discussed reality—couples often “grow together,” and sometimes that includes weight gain. From viral Reels showing women eating like birds on a first date to indulging wholeheartedly a year in, the shift is relatable.As comfort and intimacy build over time, so do shared meals, movie-night snacks, and the occasional indulgence. Food often becomes a shared love language—ordering extra fries simply because your partner wants them isn’t uncommon. But can your weight really reveal the health of your relationship?
What the Experts Say
Kushal Pal Singh, a fitness and performance coach at Anytime Fitness, believes that relationship-related weight gain is real—but highly individual.“Happy, secure couples often change their lifestyle habits,” he explains. “They might eat out more, consume comfort food, or exercise less. It’s not universal, but it’s backed by research.”
Singh references the “relationship weight gain” theory: people in committed, stable partnerships are typically less concerned with physical appearance than when they were single. Feeling emotionally secure may lead to a more relaxed attitude toward fitness and food.
Why Relationship Weight Gain Happens
Here are some reasons experts cite:- Less Emphasis on Physical Appearance: Early dating often inspires people to look their best. Over time, that pressure eases, and staying fit may become less of a priority.
The Hormone Connection: Stress and Weight
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Dr. Rajiv Kovil, head of diabetology at Zandra Healthcare and a weight loss specialist, agrees that new relationships may lead to weight gain, but emphasizes that couples must actively work toward maintaining a healthy lifestyle.
“When you’re in a secure, happy relationship, your body produces feel-good hormones like oxytocin, dopamine, and serotonin,” Dr. Kovil explains. “These reduce stress and emotional eating. On the other hand, toxic or stressful relationships elevate cortisol, which increases cravings, fat storage, and ultimately leads to weight gain.”
Experts agree that a temporary weight increase is normal in a new relationship. But if weight gain persists—despite a balanced diet and regular exercise—it may signal elevated stress levels due to relationship issues. That’s where the now-popular phrase, “If your body is rejecting your partner,” begins to make sense.
Newlywed Weight Gain : The Numbers Don’t Lie
The phenomenon is even more pronounced among newlyweds.A study involving over 8,000 participants found that, on average, married women gained 24 pounds within the first five years of marriage. Women cohabiting without marriage gained about 8 kg, while those in committed but non-cohabiting relationships gained roughly 6.8 kg.
Men weren’t exempt either. Interestingly, researchers noted little difference in weight gain between married men and those simply living with their partners.
The study concluded that happy couples are often less motivated to maintain a certain weight because they’re no longer seeking a partner. Emotional security lowers the urgency to maintain external appearances.
A Healthy Balance Is Key
The bottom line? A little weight gain in a secure relationship is normal, even expected. But significant or sustained changes could be your body’s way of telling you something.If you’re eating well and exercising but still gaining weight, your relationship could be contributing to elevated cortisol levels. In such cases, it may be time to look beyond the scale and reassess the emotional dynamics of your partnership.
For couples, the solution lies in balance: maintain healthy eating, stay active together, and create an environment where both physical and emotional well-being are prioritized.
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