How flavour science can help people stick to low-salt diets

Taste satisfaction, not just physical fullness, determines whether people can stick to low-sodium diets over the long term — and nutrition experts say rebuilding flavour intelligently is the key to making healthier eating habits last.

Why low-sodium diets often fail

Anuja Agarwala, former Dietitian at the All India Institute of Medical Sciences (AIIMS) and Vice President of the Indian Dietetic Association, told HT Lifestyle that dietary failure is rarely about a lack of knowledge. People often understand the health risks associated with excess sodium — including high blood pressure and heart disease — but still struggle to maintain change when food starts to feel bland.

"When we talk about eating behaviour, satiety is about much more than just physical fullness, it is also about emotional and sensory satisfaction," Agarwala said. "People don't choose food based on nutrition alone; they return to meals that feel comforting, enjoyable and complete. This is one of the biggest reasons low-sodium diets often fail. Even when people understand the health risks associated with excess sodium, sustaining dietary change becomes difficult if food starts to feel bland or less satisfying."

The cultural dimension of taste in India

Agarwala noted that in India, this challenge is particularly pronounced, as food is deeply connected to culture, tradition, and memory. Simply removing salt without replacing it with something equally satisfying is not enough.

"In India especially, taste is deeply connected to culture, habit and memory, making satisfaction a key driver of long-term adherence," she said. "The real opportunity lies in shifting the conversation from simply reducing salt to rebuilding taste intelligently. This can be achieved through thoughtful taste design, ingredient combinations, cooking techniques, and taste enhancers such as umami-rich ingredients. The goal is to ensure healthier meals remain deeply satisfying, making it easier for people to adopt and sustain better dietary habits."

The science of umami and taste design

Eram Rao, Professor of Food Technology at Bhaskaracharya College of Applied Sciences, University of Delhi, said taste is one of the most powerful predictors of dietary success. Reformulating food to be both healthier and flavoursome, she told HT Lifestyle, is now a growing priority in public health nutrition.

"Taste is one of the strongest predictors of whether people will accept and sustain dietary changes, which is why taste science and food reformulation are becoming increasingly important in public health nutrition," Rao said. "The goal is not to take taste away, but to use science to build it back in smarter ways."

Rao pointed to umami — widely recognised as the fifth basic taste — as a particularly valuable tool. Driven by amino acids such as glutamate, umami enhances savouriness, depth, and mouthfeel in ways that make food feel richer and more satisfying, even with reduced salt.

Ingredients and techniques that preserve flavour

Rao outlined a range of ingredients and cooking approaches that can help retain taste while cutting sodium. These include umami-rich foods such as tomatoes, mushrooms, and aged cheeses, as well as fermented foods and seasonings like monosodium glutamate (MSG), herbs, and spices such as pepper, cumin, and curry leaves.

"Umami-rich ingredients and taste-enhancing techniques such as tomatoes, mushrooms, aged cheeses, fermented foods, and seasonings like MSG, herbs, spices, and condiments such as pepper, cumin, and curry leaves, can help retain taste even when sodium is reduced, allowing nutritious foods to remain appealing without compromising taste," Rao said. "Additionally, naturally occurring acidulants such as tartaric acid and citric acid can enhance the palatability of food containing less sodium."

Indian research backs sodium reduction through flavour science

Research conducted in India supports this approach. A study by the CSIR–Central Food Technological Research Institute (CFTRI) found that optimised combinations of salt and MSG in common Indian foods can reduce sodium content by approximately 22–32% without any meaningful loss of taste or consumer acceptability, Rao noted.

Health and enjoyment can work together

Both experts agreed that meaningful dietary change is most achievable when it does not come at the expense of pleasure. As nutrition science evolves, the emphasis is increasingly shifting away from restriction and towards satisfaction — making nutritious food just as enjoyable as it is beneficial.

"Ultimately, meaningful dietary change happens when health and enjoyment work together, because people are far more likely to embrace healthier choices when the eating experience still feels satisfying," Rao concluded.

Note: This article is for informational purposes only and is not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.