What is the Maximum Amount of Carbohydrates That is Still Able to Induce Ketosis and Suppress Appetite?

Summary

Two dietary approaches, very low energy diets (VLEDs) and ketogenic low carbohydrate diets (KLCDs), have the ability to suppress appetite. The suppression of appetite typically observed during these diets is believed (but not clinically proven) to be due to ketosis, a condition where circulating concentrations of ketone bodies are increased due to a higher production of ketones in the liver. Little is known about the potential mechanisms through which ketosis may lead to appetite suppression in VLEDs and KLCDs. A 'ketogenic diet' typically contains less than 50 grams carbohydrate per day, yet ketosis has been seen in subjects who consume diets with a carbohydrates ranging between 59-192 grams per day. Although an association between ketosis and appetite suppression has been established, the minimum level of ketosis and maximum carbohydrate intake that is still associated with appetite suppression remains unknown and should be explored. The ability to increase carbohydrate intake while maintaining a suppressed appetite will allow dieters to consume more carbohydrate-rich food that is beneficial for health without feeling more hungry.

The study, 'can Appetite Suppression be achieved using KEtogenic Diets with more carbohydrates?' (ASKED) aimed to:

* to identify the maximum carbohydrate intake that is still associated with appetite suppression in a low energy diet and to determine the impact of a higher carbohydrate intake on appetite suppression, ketosis, body composition, and resting metabolic rate. A
* to evaluate the impact of weight loss while in and out of ketosis on markers of appetite (appetite related hormones and appetite sensations measured using visual analogue scales).

Conditions

• Obesity

Interventions

OTHER

Low energy diet 70 gram carbohydrates

isocaloric 4128 kilojoules/day (1000 kilocalories/day) for men and women, low energy diet containing 70 gram carbohydrates

OTHER

Low energy diet 100 gram carbohydrates

isocaloric 4128 kilojoules/day (1000 kilocalories/day) for men and women

OTHER

Low energy diet 130 gram carbohydrates

isocaloric 4128 kilojoules/day (1000 kilocalories/day) for men and women, low energy diet containing 130 gram carbohydrates

Sponsors & Collaborators

• Norwegian University of Science and Technology

  lead OTHER

Principal Investigators

• Magne Børset, phd prof · Norwegian University of Science and Technology

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

65 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2017-05-01

Primary Completion

2019-12-31

Completion

2019-12-31

Countries

• Norway

Study Locations