Are You Eating Too Much Fat to Lose Weight on Keto

The ketogenic diet shifts your body’s primary fuel source from carbohydrates to fats. This metabolic state, known as ketosis, requires careful balancing of macronutrients. While fat is the cornerstone of keto, consuming too much can stall weight loss despite being in ketosis.

How Fat Intake Affects Ketosis and Weight Loss

Ketosis occurs when carbohydrate intake is low enough to deplete glycogen stores, typically below 50g per day. Fat then becomes the primary energy source. However, being in ketosis doesn’t automatically lead to weight loss – you still need a calorie deficit. A 2013 meta-analysis found that very-low-carbohydrate ketogenic diets led to greater weight loss than low-fat diets, but emphasised the importance of overall calorie control (Bueno et al, 2013).

Calculating Your Ideal Fat Intake

Your fat needs depend on:

Current weight and body composition
Activity level
Weight loss goals

As a general rule, aim for 1-1.5g of fat per kilogram of your ideal body weight. For someone targeting 70kg, that’s 70-105g of fat daily. keto macro calculators can help personalise these numbers.

What This Means in Practice

UK supermarkets make keto-friendly fats accessible year-round. Tesco sells 500g blocks of mature cheddar for £3.50, providing both fat and protein. In winter, hearty meals like beef stew with extra virgin olive oil (£6 for 750ml at Sainsbury’s) keep you satisfied. Summer brings fresh avocados (often 2 for £1.50 at Aldi) and fatty fish like mackerel.

Common Mistakes with Fat Consumption

Many beginners treat the keto diet as license to eat unlimited fat. While you need adequate fat for energy and satiety, excess calories from any macronutrient can lead to weight gain. Research shows that the appetite-suppressing effects of ketosis help naturally regulate intake (Sumithran et al, 2013).

Frequently Asked Questions

Can I lose weight without counting calories on keto?

While some people naturally eat less on keto due to reduced appetite, most still need to be mindful of portions for consistent weight loss. Tracking initially helps establish appropriate intake levels.

What are the best fat sources for weight loss?

Prioritise whole food sources like nuts, seeds, oily fish, and quality oils. These provide nutrients along with fats, unlike processed keto snacks which can be easy to overconsume.

How do I know if I’m eating too much fat?

If your weight loss stalls for several weeks despite being in ketosis, reassess your fat intake. monitoring ketone levels can help determine if you’re truly in ketosis while adjusting macros.

The Bottom Line

Fat is essential on a ketogenic diet, but more isn’t always better for weight loss. Finding your personal balance between adequate fat for energy and a moderate calorie deficit is key. If you’d rather not do the macro maths yourself, the Keto Dieting app does it for you on Google Play and the App Store.

References

Bueno NB, de Melo IS, de Oliveira SL, da Rocha Ataide T (2013). Very-low-carbohydrate ketogenic diet v. low-fat diet for long-term weight loss: a meta-analysis of randomised controlled trials. British Journal of Nutrition. https://doi.org/10.1017/S0007114513000548
Sumithran P, Prendergast LA, Delbridge E, et al (2013). Ketosis and appetite-mediating nutrients and hormones after weight loss. European Journal of Clinical Nutrition. https://doi.org/10.1038/ejcn.2013.90