Glycerine is affected by weather conditions especially heat and humidity so the results you get in summer may be different to those achieved during winter.
It is better to use glycerine when it is normal to mildly humid and when the temperature is quite warm not hot.
This is because when the weather is very dry there isn't enough water in the general environment for the glycerin in your hair to attract; it might compensate for this by actually taking much needed moisture out of your hair and therefore drying it out! If it is very humid, glycerine might attract so much water to your hair causing it to frizz!
- Glycerine can be made from animal or vegetable fat. If you don't like using animal fats on your hair then you should always look out for "vegetable glycerine".
- If you use too much glycerine it will make your hair very sticky and if you have thin hair too much product will weigh down your hair and impact the curl pattern you achieve.
Those are the key disadvantages of glycerine for hair application. Overall, keep in mind that spring and autumn are good months for glycerine, the heights of summer and winter are not.
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