Milk and Fruit Smoothies: What Ayurveda Says About Viruddha Ahara

Key takeaway: Ayurveda advises against mixing milk with sour fruit or with banana. Some foods are wholesome on their own but do not suit each other. Such pairs are called viruddha ahara, or incompatible food. They are considered to work against the body and to be harder to digest.

Banana, berries or mango. Some curd or Greek yogurt. A splash of milk, a spoon of flax or chia, a little honey. Every ingredient in a smoothie is healthy on its own. So the smoothie feels like the healthiest thing you have all day.

You probably judge a food on its own. Is it healthy? Is it nutritious?

Ayurveda asks a question most of us never ask. Do these foods go together?

What Makes a Food Healthy in Ayurveda?

In Ayurveda, a food is healthy for you when it suits you in quantity, quality, digestibility, season and compatibility.

It also has to suit the person eating it: their agni (digestive fire), prakriti (natural constitution), vikriti (current imbalance), age, activity and state of health.

Sushruta Samhita defines a svastha, or healthy person, as someone who has:

• Balanced doshas, the three functional forces of the body: Vata, Pitta and Kapha.

• Balanced jatharagni, the digestive fire.

• Balanced dhatus, the body tissues.

• Balanced malakriya, the proper formation and clearing of waste.

• A content mind, senses and self.

Of these, jatharagni matters most when it comes to food. Charaka Samhita says that life, strength, health, enthusiasm and ojas, the essence of vitality, all depend on it.

When jatharagni is strong, food is digested well. It nourishes the body's tissues, and what the body does not need leaves as waste.

When jatharagni is weak, part of the food is not digested. Ashtanga Hridaya calls this ama, a heavy, sticky residue. In Ayurveda, ama is seen as the root of many imbalances.

This changes the smoothie question

A smoothie is meant to be a quick, wholesome start to the day. Each ingredient is chosen because it is good for you. But if the combination is hard for your body, it works against the very reason you're drinking it.

What Is Viruddha Ahara?

Viruddha ahara means incompatible food: foods, combinations or eating practices that work against the body, even when each food is wholesome on its own.

Charaka Samhita describes viruddha ahara as food that works against the body's tissues (dhatus). It stirs up the doshas but does not let the body clear them, so the disturbance stays inside. In Ayurvedic practice, viruddha ahara is also linked to weaker digestion and ama.

Two wholesome foods can become unsuitable together because of samyoga, the combination. When two foods are combined, the combination takes on qualities that neither food has on its own. So a pair is judged as a pair. The properties of each food explain many pairs, but not every one.

Charaka Samhita lists eighteen kinds of incompatibility. Some of them apply to a smoothie:

• The foods it is combined with.

• The potency of those foods, meaning whether each one heats or cools your body.

• The season it is taken in. A chilled smoothie in winter is one example.

• The quantity.

• Your own digestive strength.

Which of these apply depends on the ingredients you use and when you have your smoothie. Most milk-and-fruit smoothies fall under incompatibility by combination and by potency. Season, quantity and your digestive strength decide how much any of this affects you.

What Does Ayurveda Say About Each Ingredient in Your Smoothie?

Milk and fruit: why does Ayurveda keep them apart?

Milk and many fruits do not suit each other in taste, qualities or potency. Ayurveda describes every food through five properties. Three of them explain most smoothie pairs:

• Rasa, the taste.

• Guna, qualities such as heavy or light.

• Virya, the potency, meaning whether the food heats or cools your body.

Charaka Samhita says sour food should not be taken with milk. It names sour mango, citron, jamun, ber and wood apple as examples, and extends the rule to every sour food. Berries, pineapple, kiwi and orange are sour, so the rule applies to them too.

Fruit and Dairy Pairings Ayurveda Advises Against 

Each pair in the table is named in the classical texts as viruddha ahara. Such a pair is considered harder to digest than either food alone, and it disturbs the body's doshas and tissues.

Opposite potency does not make every pair unsuitable. A pinch of dry ginger in warm milk, or sugar with curd, is advised in Ayurveda.

Curd and yogurt: are they okay in a smoothie?

A daily fruit-and-curd smoothie is not advised in Ayurveda. Curd has a place in the diet, but it comes with rules for when and how to take it.

Curd is amla (sour), ushna (heating) and guru (heavy). It increases Kapha and Pitta. Curd is also Abhishyandi, which means it increases the body's secretions and tends to block its channels.

Because of these qualities, Ayurveda gives five rules for curd:

• Not at night. According to Ayurveda, curd increases Kapha, and Kapha is naturally higher in the early part of the night. Digestion also tends to slow down at night. So, eating curd late in the day may lead to heaviness, gas or bloating, especially in people who have weak digestion. Have it during the day.

• Not heated. Curd has Ushna Virya (heating potency). Heating it further may intensify this quality.  This may aggravate Pitta and Kapha Doshas, and some people may notice skin flare-ups, a sour or burning feeling, and digestive discomfort.

• Not plain. Take it with honey, or with ghee and sugar (sharkara), or with green gram soup or amla. These are the pairings named for curd. Ghee, sugar and amla offset its heat. Honey and green gram offset its effect on Kapha.

• Not every day. Curd is heavy and increases Kapha, so it is not meant as a daily food.  Daily curd consumption can disturb the balance of 

• Kapha and Pitta Doshas.

• Not in spring, summer or autumn. Kapha rises in spring and Pitta in autumn, and summer adds heat. Curd increases both Kapha and Pitta.

A fruit-and-curd smoothie usually has plain curd, and many people have one every day. Both go against these rules.

Amla is the fruit named for pairing with curd. Banana is the fruit to keep away from curd. Curd and banana are both heavy, and both increase Kapha, so a curd-and-banana smoothie is best avoided.

Honey: is it okay in a smoothie?

Yes, as long as the smoothie is cold. Honey should never be heated or added to hot food or drinks. Heated honey is itself viruddha ahara, incompatible by preparation.

What about chia, flax and other seeds in a smoothie?

Seeds are better taken with food than in a milk-and-fruit smoothie. Ayurveda judges seeds like any other food: by their own properties and by what they are combined with. A spoon of chia, flax, sesame, pumpkin or sunflower is now in almost every smoothie.

Most seeds are heavy and oily, so they need strong digestion. A milk-and-banana smoothie is already heavy. Adding seeds to it makes the drink heavier still.

• Flax (atasi) is sweet and slightly bitter, heavy, oily and heating. These qualities make flax useful for calming Vata. The same qualities mean it can aggravate Pitta and Kapha. In a smoothie, flax adds heat and heaviness to the drink.

• Sesame (tila) is heavy, oily and heating. These qualities calm Vata but can increase Kapha and Pitta. Milk and banana also increase Kapha, so a milk-and-banana smoothie with sesame increases Kapha further.

• Chia, pumpkin and sunflower seeds are not native to India, so the classical texts do not describe them. There is no classical basis to judge how they combine with other foods. Chia also swells into a gel in liquid, which makes the drink thicker and heavier. If you use these seeds, treat them as modern foods and notice how your digestion responds.

How to take seeds the Ayurvedic way:

• Keep the quantity small. Seeds are concentrated and heavy to digest.

• Prepare them. Ayurveda says that preparation changes a food's qualities, and Indian kitchens have long dry-roasted flax and sesame before eating them.

• Have seeds with food, not in a milk-and-fruit blend.

• Go by your body. If you tend to feel hot, go easy on heating seeds like flax and sesame.

Can You Have a Milk-and-Fruit Smoothie Once in a While?

A small milk-and-fruit smoothie, taken when digestion is strong, is a lesser concern in Ayurveda. Charaka Samhita says incompatible food has less effect on a person who takes it in a small quantity, has strong digestion, is young, or is strong from regular exercise. A lesser effect is still an effect. Ayurveda says the effect of an incompatible pair may show at once, or build up slowly and show later.

A large glass, taken when digestion is weak, is a greater concern.

When milk with sour fruit or banana does not suit a person, it may weaken jatharagni, leave behind ama, and keep the doshas and tissues out of balance.

How Can You Tell If Your Food Suits You? 

Ayurveda describes six signs that food has been properly digested (jirna ahara lakshana):

• Clear belching, without the taste of the meal (udgara shuddhi).

• Energy and enthusiasm (utsaha).

• Timely and satisfactory passing of stool and urine (vegotsarga).

• A light feeling in the body (laghuta).

• Hunger (kshut).

• Thirst (pipasa).

When these signs are missing after a meal, Ayurveda reads it as food not yet fully digested. Look for these signs in the hours after your smoothie.

How Can You Rebuild Your Smoothie Habit?

Fruit, milk and curd are all good foods. They work better apart.

• Fruit: Eat fresh, seasonal fruit on its own, preferably between meals.

• Milk: Have it on its own, warmed, with a pinch of cardamom, turmeric or dry ginger. Warming and a pinch of spice make milk lighter to digest.

• Blended drink: Still want a smoothie? Blend your fruit with water. It keeps the drink light and lets the fruit's own flavour come through. A little honey is fine, since the drink is not heated.

• Curd: Have it during the day, with honey, ghee and sugar (sharkara), or green gram soup, and not every day.

• Savoury option: Try takra (spiced buttermilk) with roasted cumin and a pinch of rock salt.

Frequently Asked Questions

1. Can we drink milk with fruit according to Ayurveda?

Ayurveda advises against taking milk with sour fruit or banana. In a small quantity, and with strong digestion, the effect is milder.

2. Is a banana milkshake okay in Ayurveda?

Ayurveda advises against banana milkshake. Milk and banana are both sweet, heavy and cooling, and together they are considered heavy to digest. Sushruta Samhita lists banana with milk under samyoga viruddha, incompatible combinations.

3. Can we eat banana with curd?

Ayurveda advises against banana with curd. Curd and banana are both heavy, and both increase Kapha. Taken together, they add to each other. Excess Kapha slows jatharagni, the digestive fire, and food that is not fully digested leaves behind ama.

4. What is an Ayurvedic alternative to a fruit smoothie?

Have fruit on its own and warm spiced milk separately. For a savoury option, try takra (spiced buttermilk) with roasted cumin.

5. Is mango milkshake okay in Ayurveda?

Charaka Samhita names sour mango among the fruits to keep away from milk. Ripe, sweet mango is treated differently, and Bhavaprakasha describes ripe mango with milk favourably.

Medically Reviewed by: Dr. Bhargav Ranabhai Ladumor, MD (Ayurveda), Sri Sri Tattva, Gujarat | Registration No.: GB I 21956

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This article is for general wellness education and is not medical advice. Please consult a qualified Ayurvedic practitioner for personal guidance.