Few carbohydrates
Low-carb & keto
Electrolytes, magnesium and MCT oil – what many people add on low-carb and keto diets.
$0.64a day
at the lowest prices, quality 75+
$3.95with typical prices
$19
a month
$233
a year, at the lowest prices
What it’s for
When you cut carbs, your body holds less water and loses more salt – electrolytes replace it. Magnesium is needed for muscles and nerves. MCT oil is a fat the liver quickly turns into ketones, a source of energy on keto.
Not medical advice.
What’s in it
Electrolytes
500 mg sodium 500 mg is less than the 1,500 mg of sodium a day that’s considered adequate for adults, from food and drinks together (National Academies).Not a recommendation. Not medical advice.
- Lowest
- $0.22
- Typical
- $2.50
Magnesium
200 mg magnesium 200 mg is less than the 310–420 mg recommended a day for adults, from food and supplements together (NIH).Not a recommendation. Not medical advice.
- Lowest
- 1.6¢
- Typical
- $0.43
MCT oil & powder
15 g MCTs There’s no official daily amount for MCTs.Not a recommendation. Not medical advice.
- Lowest
- $0.40
- Typical
- $1.02
Each color is one part of the combo – per day.
| Part | Lowest | Typical |
|---|---|---|
| Electrolytes | $0.22 | $2.50 |
| Magnesium | 1.6¢ | $0.43 |
| MCT oil & powder | $0.40 | $1.02 |
Not medical advice
We compare prices and label data. The amounts are the ones we compare by – usually the common amount on labels – not recommendations. Talk to a doctor or pharmacist before taking supplements, especially if you are under 18, pregnant or on medication.
Prices: our own check of 7,383 products in US online stores (Nov 1, 2026). How we check
