Make sure the supplement is third-party tested
Third-party testing by external organisations is a mark of quality for a supplement.
Make sure the B vitamins are in their active form.
For vitamin B9, opt for the 5-methyltetrahydrofolate or (6S) acid form. Not to be confused withfolic acid during pregnancy, a non-bioavailable form.
Also opt for methylcobalamin over other forms for vitamin B12.
For vitamin B6, look for the pyridoxal-5-phosphate form.
Opt for vitamin D in D3 form
Vitamin D3 is more effective than vitamin D2 at raising and maintaining vitamin D levels in the body [9].
Choose the right form of vitamin K
Vitamin K2 is much better absorbed by the body than vitamin K1, and it has a longer half-life. We also opt for the vitamin K2 MK7 form, which is the most bioactive [10].
Watch out for iron
Iron requirements increase during pregnancy [11]. It is important to have an adequate iron intake to support the expansion of blood volume, thyroid and immune function, to help combat fatigue, and to allow for proper brain development in the baby [12].
However, many women do not need to supplement as they consume enough iron through their diet, and for those who do need to supplement, the amount of iron required varies considerably from person to person. Moreover, high doses of iron supplement can generate oxidative stress, which in turn disrupts the gut microbiome [11].
It is therefore important to have your iron status tested and to discuss this with a healthcare professional before starting any supplementation. Ideally, consult a healthcare professional specialising in nutrition, who will encourage you to run a comprehensive panel (ferritin, serum iron, transferrin, transferrin saturation, total iron-binding capacity, soluble transferrin receptor) and will be able to interpret the results in the context of your personal situation.
Also make sure to avoid pro-oxidant medicinal iron and opt instead for iron in bisglycinate form, which is the best absorbed and tolerated by the body [13].
Iron Mama, our iron supplement for pregnant women, covers 100% of the recommended daily intake of iron in just 1 capsule. Say goodbye to the discomfort associated with iron capsules — with our Ferrochel™ iron bisglycinate, our capsules combine optimal absorption with digestive comfort.
And don't forget: the best approach is to supplement according to your own needs.
Calcium supplementation is not always necessary
Most women generally consume sufficient calcium through their diet, and during pregnancy the efficiency of intestinal calcium absorption doubles, which means supplementation is generally not necessary [14]. To find out more, read our article on calcium and pregnancy.
Make sure the oil providing the DHA is of high quality
Supplements that contain their omega-3 in the same capsule as other micronutrient powders should be avoided! These are particularly fragile fats, highly susceptible to oxidation — especially when in contact with other vitamins and minerals — meaning they can lose all their beneficial properties...
The Totox index is a good indicator of the quality and oxidation level of an oil. This value should be below 26, and the peroxide value should be below 5. Beware of fish oils that advertise an extremely low Totox index — these figures generally refer to the Totox measured on the crude oil before purification, or to the Totox measured just before the product is barrelled, both of which significantly understate its true value and are therefore not reliable.
If the oil is fish-derived, make sure it holds quality, purity, and pollutant-free certifications.
Be cautious with vegetable capsules containing omega-3. Vegetable capsules can be very interesting, but there is not yet enough reliable evidence to show that they form a sufficient protective barrier to guarantee the stability and absence of oxidation for omega-3, whoseomega-3 DHA.
Our omega-3 oil is completely separate from the other active ingredients so that it retains all its properties and does not become oxidised. It is sourced from a very high-quality fish oil, guaranteed Qualitysilver® and certified Friend of the Sea®, extra pure and free from pollutants. Its stability is also guaranteed with an exceptionally low Totox index of 13 post-production, and a peroxide value of 0.7.
Bonus: our amber glass jar protects them from light and therefore from oxidation.
Make sure the supplement contains choline
Choline is an essential nutrient that is very rarely found in prenatal supplements, despite the vital role it plays in baby's development. It helps, among other things, to reduce the risk of neural tube defects, much like vitamin B9. Our supplement choline pregnancy meets the needs of mothers and their babies.
To find out more about choline, read our article on choline and pregnancy.
Avoid unnecessary and potentially harmful compounds
You will often find them listed as colourant, thickener, emulsifier, anti-caking agent, etc.
Among the worst: silicon dioxide E551 (anti-caking agent) and titanium dioxide E171 (used as a colourant).
These are nanoparticles — extremely fine particles that can become lodged in the body. Several in vitro studies point to a possible toxic effect (oxidative stress) of silica nanoparticles on certain intestinal cells.
In June 2019, a team of French researchers published a study seeking to evaluate the impact on mice of repeated, long-term exposure to amorphous silica nanoparticles [17]. The exposure took place over 18 months via drinking water, at a dose comparable to the estimated exposure from the consumption of food additives in a typical diet. Abnormalities were detected in the kidney tissue of the exposed mice, along with inflammatory hepatic responses.
If you spot them, run a mile!
Check the nutrient doses
For a supplement to be effective, the form of the nutrients is not enough on its own. The quantities matter just as much.
Make sure your supplement covers your needs and contains at least:
- 400 µg of folate
- 80 mg of choline
- 200 mg of DHA
- 150 µg of iodine
Be wary of food supplements that champion naturalness at every turn. In their natural form, most vitamins and minerals contain far fewer active ingredients than in their synthetic form. Natural forms are sometimes not sufficient to meet your needs.
The same goes for gummies — a supplement format that allows for very little active ingredient in its formulation and is often packed with sugar... So do pay attention to the quantity of nutrients your supplements contain!