Direct Answer: That might be surprising because most assume regular soda (ex: Coca-Cola) is the worst, but statistically it’s NOT!) – Largest Peanut Butter & Chocolate Milkshake From a Chain (i.e. – Sonic, Baskin-Robbins OR Cold Stone Creamery locations)!
One of these drinks has over 2000 calories, over 130 grams of fat and over 100 grams of sugar per serving. To put that in perspective, the metabolic endpoint of drinking one of these bad boys is metabolically similar to eating three McDonald’s Quarter Pounders with Cheese within the same sitting. But “unhealthy” is going to depend a lot on individual needs. Diabetics potentially need to most fear a Sweet Tea; children, Red Dye #40 fruit punch and other such products.
For The Weight Loss Seeker: The ”Liquid Cement” Pitfall
“If dieting, your enemy is NOT soda—it’s the fancy version of coffee.”
The Counter-Intuitive Truth:
You may believe skipping the burgers helps you lose weight, yet that “Venti” mocha cookie crumble drink often contains more calories than a meal, although in your mind it’s a “drink” or a “snack.”
The Biological Mechanism:
The issue here is that there’s a reason why your body processes liquid calories differently than it does solid food. Merely chewing some solid food leads your gut to release hormones that tell your brain, “Stop, we are full.” Liquids don’t efficiently cause this satiety response. You can drink 800 sugary-creamy calories and feel hungry one hour later.
The Data:
- The Drink: A large Mocha Cookie Frozen Coffee, whole milk, with whip.
- The Damage: ~500–600 calories, 80g sugar.
- The Comparison: This is the amount of sugar in about 4.5 glazed donuts.

Actionable Steps:
- The “Chew” Rule: If a beverage has more than 50 calories, ask yourself if you would eat the equivalent number of calories on a plate.
- Swap the Base: If you have to have it, swapping whole milk for almond milk and removing the whipped cream nearly cuts its calorie count in half.
The ”Fruit” Deception For The Health-Conscious Parent
For parents concerned about behavior and future development, the #1 worst drink is Shelf-Stable Fruit Punch (i.e. Capri Sun, Hawaiian Punch, SunnyD).
The Counter-Intuitive Truth:
These are purchased by parents because the bag says “Vitamin C” or “Real Fruit Juice.” But the sugar content in such is frequently even greater than soda and the Vitamin C is chemically “enhanced,” not naturally occurring.
The Hidden Danger: Artificial Colors:
There is more than just sugar, here-food dye (Red 40 and Yellow5) is listed. It is these petroleum based chemicals that give up the bright neon colors and lead-in component for children.

The Data:
- The Drink: Red tub, as in the regular Fruit Punch.
- The Harm: High Fructose Corn Syrup (HFCS) + Red Dye 40.
- The Consequence: Studies have found an association between synthetic food dyes and worsening symptoms of ADHD and behavior in kids.
Actionable Steps:
- Read the Label: Forget the Front of the Box. Turn it over. If it says “High Fructose Corn Syrup” within the first three ingredients, put it back.
- The Dilution Method: If your child is a juice lover, purchase 100% tart cherry or grape juice and dilute it with 50% seltzer. They have the fizz and flavor, without the chemical load.
In Disease Long-Term Care: The Liver Overload
Sweet Tea (Southern style or commercially bottled) For those of you with pre-diabetes, fatty liver, and/or heart issues—the worst beverage for your health is Sweet Tea.
The Counter-Intuitive Truth:
Tea is often seen as “healthy” and “natural.” But the sweet tea you buy at a store or restaurant has a level of sugar saturation that makes it a metabolic poison. Unlike glucose, which your entire body can use for energy, the fructose (which makes up half of sugar) is metabolized in the liver.
The Biological Mechanism:
When you douse your body with liquid sugar, the likes of which you find in sweet tea, your liver can’t metabolize it quickly enough. It turns the excess fructose directly into liver fat (triglycerides). This is one of the most significant causes of Non-Alcoholic Fatty Liver Disease (NAFLD).

The Data:
- The Drink: Sweet Tea – Big (32oz).
- The Damage: ~90g of sugar.
- The Comparison: This is equivalent to about 22 teaspoons of sugar.
Actionable Steps:
- Know “Agave”: Don’t be duped by “Agave Sweetened” beverages. Agave is 90% fructose (even more than high fructose corn syrup, at around 55%), which is even worse for your liver.
- Transition Protocol: If you drink sweet tea every day, do not go cold turkey. For two weeks, wean yourself off sugar by mixing “half sweet/half unsweet” to prepare your palate.
For The Clean Eater: The Chemical Cocktail Goopy, but good.
If you don’t want to consume artificial ingredients: The #1 unhealthiest drink is Sugar-Free Energy Drink (Monster Zero, Bang, Celsius)
The Counter-Intuitive Truth:
Gym goers down these because they’re “0 Calories” and contain “0 Sugar.” Clean eating, though, is all about ingredient quality, not just macros. These drinks are chemical soups, after all.
The Mechanism:
These drinks are based on an artificial sweetener such as Sucralose or Ace-K. While they don’t spike your blood sugar immediately, they can change the bacteria in your gut (your microbiome). An altered microbiome can cause inflammation and immune dysfunction.
The Data:
- The Drink: 16oz “Zero Ultra” Energy Drink.
- The Damage: Heavy doses of Sucralose, Sodium Benzoate (preservative) and artificial flavors.
- The Risk: Regular consumption degrades food preferences to develop an over-reliance on hyper palatable sweetness, leaving natural foods like fruit tasting bland in comparison.
Actionable Steps:
- The Caffeine Substitute: If you need fuel, go to the cold brew coffee or Matcha green tea. The L-theanine in Matcha creates an alert calmness, a perfect way to start the morning without caffeine-induced jitters.
- Look for “ose”: If the ingredient list ends with an “ose” (like sucralose) or if it has anything to do with “potassium,” raise an eyebrow.
For The Shock-Seeker: The Absolute Calorie King
If all you care about is the statistical monster — in other words the drink that hurts you fastest in a single cup, it’s the Premium Milkshake.
The Logic:
These beverages mix three macronutrients that you don’t often find together in nature in large amounts:Sugar + Fat + Salt. This blend hijacks the reward system of the brain and leads to a huge flood of dopamine as substances addiction.
The Data Snapshot:
- Specific Offender: Sonic’s Oreo Large Peanut Butter Master Shake.
- Calories: ~1,700 – 2,000.
- Sugar: ~100g+.
- Fat: ~100g+.

The Reality:
To work off that one drink, the average American male would have to run continuously at a moderate pace for about three hours.
Frequently Asked Questions
What’s the most unhealthy drink in America?
It’s the Large Peanut Butter & Chocolate Milkshake (from chains like Sonic or Baskin-Robbins). “In just one meal” has over 2,000 calories with more than 130 grams of fat and over 100 grams of sugar equating to three McDonald’s Quarter Pounders, making it metabolically equivalent.
The retina in my dominant eye is tearing away from the other; could letting it heal on its own really lead to total blindness?
Seems like such an innocent drink, but these beverages tend to have as much sugar as 4.5 glazed donuts. Liquid calories also do not activate the gut hormones that tell you when you are satisfied like chewing does, so drinking sugar water can result in eating more total calories than eating the same amount of solid food.
What’s the hidden risk in children’s shelf-stable fruit punch?
In addition to high fructose corn syrup, the beverages frequently have artificial petroleum-based food dyes such as Red 40 and Yellow 5. These artificial colors have been associated with increased symptoms of ADHD and behavior problems in children, according to research.
What happens when a person drinks sweet tea in the liver?
Sweet tea is chock full of sugar, particularly a form called fructose, which the liver alone can weave into useable energy. Instead, it metabolizes the excessive fructose directly into liver fat (triglycerides) which is a major determinant of Non-Alcoholic Fatty Liver Disease (NAFLD).
Is sugar-free energy drink really healthy while doing “clean eating”?
No, because “clean eating” homes in on the quality of its ingredients, not just how many calories you’re consuming. These drinks are sometimes described as chemical cocktails, with artificial sweeteners such as sucralose and preservatives such as sodium benzoate that can alter the gut microbiome and promote inflammation.
References
Liquid vs. Solid Calories Study:
- Institution: Purdue University, School of Foods and Nutrition.
- Objects: DiMeglio, D.P., & Mattes, R.D.
- Time: 2000.
- Outcome: Researchers found that liquid carbohydrates don’t make us feel as full as solid food, so we end up consuming more calories overall.
- Citation: DiMeglio D. P., Mattes R. D. Liquid versus solid carbohydrate: effects on food intake and body weight. International Journal of Obesity, 24(6), 794–800.
Trial of Food Dyes and Behavior:
- Source: The Lancet / University of Southampton.
- Objects: McCann, D., et al.
- Time: 2007.
- Result: A random, double-blinded trial demonstrating that artificial colors (such as Red 40 and Yellow 5) led to a greater incidence of hyperactivity than a placebo in both children who were three years old and those who were either eight or nine.
- Citation: McCann, D., et al. (2007). Effects of food colours and preservatives on hyperactive and inattentive behaviour in 8/9 year old children. The Lancet, 370(9598), 1560-1567.
Fructose and Fattly Liver Research:
- Entity: The Journal of Hepatology.
- Objects: Ouyang, X., et al.
- Time: 2008.
- Findings: Fructose consumption was independently associated with higher liver fat content and the risk of nonalcoholic fatty liver disease (NAFLD).
- Citation: Ouyang, X., et al. (2008). Fructose as a risk factor for non-alcoholic fatty liver disease. Journal of Hepatology, 48(6), 993-999.
Artificial Sweeteners and Gut Microbiome Study:
- Body: Weizmann Institute of Science.
- Objects: Suez, J., et al.
- Time: 2014.
- Result: Non-caloric artificial sweeteners (such as sucralose and saccharin) were found to cause glucose intolerance by disrupting the gut flora.
- Citation: Suez, J., et al. (2014). Artificial sweeteners cause glucose intolerance by changing the gut microbiota. Nature, 514, 181-186.







