Low Glycemic Meals For Excess Weight Loss – What Are They?
A low glycemic meal is one built mostly from foods with a low glycemic index, meaning they raise blood sugar less than the same amount of carbohydrate taken as pure glucose. The idea is simple enough. Whether it helps with excess weight loss is a separate question, and the best evidence available gives a modest answer. This article covers both parts, with dates as the worked example, since they are mostly sugar yet several varieties have been measured in the low band.
It is general information, not medical advice. The NHS says anyone with a medical condition, a special diet for their health, or an eating disorder now or in the past should talk to a GP or a healthcare professional before changing their lifestyle.
What the glycemic index measures
The glycemic index, or GI, compares one food against pure glucose. In a GI test, volunteers eat an amount of the food that carries 50g of available carbohydrate, their blood sugar is checked over the next two hours, and the area under that curve is set against the curve for 50g of glucose. Glucose scores 100.
Researchers at United Arab Emirates University, writing in Nutrition Journal in 2011 (PubMed 21619670), give these bands: a GI of 55 or less is considered low, 56 to 69 is medium, and 70 or more is high. So a “low glycemic meal” in practice means a plate where most of the carbohydrate comes from foods in that first band.
Why the portion matters as much as the number
GI has a blind spot. In both studies below it was tested at a fixed 50g of available carbohydrate, whatever portion of the food that takes. A team at Qassim University in Saudi Arabia, in a 2016 paper in the Annals of Saudi Medicine (PubMed 27920411), put it plainly: the glycemic load, or GL, “considers realistic portion sizes”, and any food “could have a low, medium, or high GL depending on the size of the portion eaten.” Their bands for GL are 10 or less for low, 10 to 20 for medium and 20 or more for high.
That is the number to watch when planning meals. A food with a modest GI eaten by the bowlful can carry a bigger load than a high-GI food eaten as a garnish.
Where dates land
The Qassim team tested 17 date varieties at the tamar stage on 19 healthy adults. The average GI was 55.2, with a range from 42.8 to 74.6, and the authors found no significant difference in GI between varieties. For the load, they took three average-sized dates as one serving. Three numbers from their table are useful for anyone shopping in Malaysia:
- Ajwa (the one sample from Madinah): GI 55.9, GL 8.5, the lowest load in the study
- Medjool: GI 55.3, GL 17.2
- Sukkary: GI 43.4, GL 11.7
The other 16 samples, Medjool included, were grown in Al-Qassim, and the authors note that their tamar-stage results may not carry over to all types of dates. The UAE study found a similar picture for five commonly used varieties, with GIs from 46.3 to 55.1 in healthy volunteers, Khalas being the highest of the five.
So most dates come out low to medium on GI. The catch is the load. Three Medjool already reach the medium band, with a GL of 17.2 in the Qassim table. USDA FoodData Central (FDC 168191, SR Legacy, 2019) lists Medjool at 277 kcal, 75g of carbohydrate and 66.5g of total sugars per 100g, which works out to about 83 kcal and 20g of sugars in 30g.
What the NHS puts on a weight-loss plate
The NHS starchy-food page doesn’t use GI at all. Its weight-loss advice for starchy food is about fibre. It says to choose wholegrain varieties and eat potatoes with their skin on for more fibre, and it points out that fibre can help you feel full, which makes wholegrain starchy foods “a particularly good choice if you’re trying to lose weight”. Its own swaps are brown rice, wholemeal or granary bread, porridge and oven-baked potato wedges instead of chips.
A lunch of brown rice, a lean protein and a heap of vegetables follows that advice. Pulses help too: the NHS Eatwell Guide calls beans, peas and lentils good alternatives to meat because they are low in fat and a good source of fibre and protein.
Dates belong in the meal, not between meals. The NHS says a 30g portion of dried fruit such as dates counts as 1 of your 5 A Day, but should be eaten at mealtimes, not as a snack between meals, to reduce the impact on teeth. Weigh 30g once, chop it over plain porridge, and the portion stops being a guess.
What the weight-loss trials actually found
Here is the honest part. In 2023 Cochrane updated its review of low GI and low GL diets for people with overweight or obesity (PubMed 37345841). The review team, six of eight based in Malaysia at Taylor’s University, Monash University Malaysia, the National University of Malaysia and Universiti Malaysia Sabah, included 10 trials with 1,210 participants. Compared with higher-GI diets, low-GI diets “probably result in little to no difference in change in body weight”, and the authors concluded there is not enough information to draw firm conclusions either way.
That does not make low-GI meals pointless. It means the GI label is not doing the work by itself. The NHS is blunt about what does: most adults need to lose weight by eating fewer calories, and on average women need around 2,000 calories a day and men around 2,500. A low-GI plate that is also a smaller plate is the version that fits that advice.
Buying dates for this kind of meal plan
If the numbers above have you comparing varieties, Green Diamond (Pembekal Kurma Green diamond) is a Malaysian date wholesaler whose homepage lists Ajwa, Medjool, Mariami and Safawi at wholesale prices, so harga kurma ajwa is easy to check there. It delivers across Malaysia, which makes it one Pembekal Kurma to look at before an order.
Date Fruits handles everything from retail buying to wholesale supply and delivers across the country, as our about us page explains. The contact page has a form for questions, and our other articles are on the blog.