Quick Answer: Most protein supplements are considered safe during pregnancy, but the supplement industry is not tightly regulated in Canada. Choose products with third-party testing and a Health Canada NPN number. Recent research suggests pregnant women need 1.2 to 1.52 g/kg of protein daily, higher than current guidelines. Most Canadian women already meet this through food alone, primarily from dairy.
In This Guide
Reading Time: 9 minutes
Pregnancy changes your relationship with food in ways nobody fully prepares you for. One day you cannot stomach the chicken you normally love. The next, you are craving peanut butter at midnight. Somewhere in between, you start wondering whether you are getting enough protein for two.
It is a fair question. And the protein supplement aisle at your local Brantford pharmacy makes it look like the answer is a simple scoop and shake. The reality is a bit more nuanced.
Do You Actually Need Protein Supplements?
Let us start with the honest answer: most pregnant women in Canada do not need protein supplements.
A study published in PubMed (2014) found that Canadian pregnant women at both 16 and 36 weeks of gestation were already consuming more dietary protein than the Dietary Reference Intakes recommend. The primary source was dairy products, followed by meat and legumes.
The current recommended dietary allowance for protein during pregnancy is 1.1 grams per kilogram of body weight per day. However, more recent research published in the Journal of Nutrition suggests this may be too low. Using more precise measurement techniques, researchers found that actual protein requirements are closer to 1.2 g/kg per day in early pregnancy and 1.52 g/kg per day in late pregnancy.
| Body Weight | Current Guideline (1.1 g/kg) | Updated Research (early) | Updated Research (late) |
|---|---|---|---|
| 55 kg (121 lbs) | 60 g/day | 66 g/day | 84 g/day |
| 65 kg (143 lbs) | 72 g/day | 78 g/day | 99 g/day |
| 75 kg (165 lbs) | 83 g/day | 90 g/day | 114 g/day |
| 85 kg (187 lbs) | 94 g/day | 102 g/day | 129 g/day |
For context: a chicken breast has roughly 31 grams of protein. A cup of Greek yogurt has about 17 grams. Two eggs have 12 grams. Most women eating a varied diet are hitting these targets without trying.
When supplements may make sense
There are situations where a protein supplement can genuinely help:
- Severe morning sickness that limits food intake, especially in the first trimester
- Food aversions that eliminate major protein sources (very common in pregnancy)
- Vegan or vegetarian diets where meeting higher third-trimester requirements takes more planning
- Multiple pregnancies (twins, triplets) where protein needs increase further
- Hyperemesis gravidarum where keeping any food down is a challenge
Brad, Owner, 40+ years of experience: "We are a mattress store, not a nutrition clinic. But pregnancy is one of the most common reasons people come in looking for better sleep, and nutrition comes up in those conversations. What I always say is: talk to your doctor about supplements. Talk to us about your mattress. Both matter for how you feel."
8 min read
Types of Protein Powder and Pregnancy Safety
If you and your healthcare provider decide a protein supplement is appropriate, here is how the main types compare for pregnancy safety.
| Type | Source | Pregnancy Considerations | Protein per Scoop (approx.) |
|---|---|---|---|
| Whey isolate | Dairy (cow's milk) | Generally safe. Avoid if lactose intolerant or dairy-sensitive. | 25-30 g |
| Whey concentrate | Dairy | Contains more lactose than isolate. May worsen pregnancy nausea. | 20-25 g |
| Casein | Dairy | Slower digesting. May be better tolerated for evening use. | 20-25 g |
| Pea protein | Yellow peas | Dairy-free, hypoallergenic. Good vegan option. | 20-25 g |
| Rice protein | Brown rice | Check for heavy metal testing (rice absorbs arsenic from soil). | 15-20 g |
| Collagen | Animal connective tissue | Not a complete protein. Limited pregnancy-specific research. | 10-20 g |
What to Watch Out For on the Label
This is the critical safety section. In Canada, protein supplements are regulated as Natural Health Products, meaning they should carry an NPN (Natural Product Number) on the label. However, enforcement varies, and some products slip through without adequate testing.
Red Flags on Protein Powder Labels:
- Proprietary herbal blends: These can hide ingredients like ginseng, green tea extract, or adaptogenic herbs that may not be safe during pregnancy
- Excessive added vitamins: Particularly vitamin A (retinol), which in high doses can cause birth defects. Check your prenatal vitamin before stacking additional vitamin A
- Caffeine or guarana: Health Canada recommends pregnant women limit caffeine to 200 mg per day. Some protein powders contain undisclosed caffeine
- No NPN number: If a Canadian product lacks an NPN, it has not been reviewed by Health Canada for safety, efficacy, or quality
- Long ingredient lists: Simpler is safer. Look for products with 5 to 10 recognizable ingredients
Third-party testing organizations like NSF International or Informed Choice certify that products contain what they claim and are free from banned substances and contaminants. If you are going to use a protein powder during pregnancy, these certifications provide an extra layer of assurance.
Protein and Pregnancy Sleep
Here is where our expertise connects with yours. Protein intake and sleep quality during pregnancy are linked in ways that are worth understanding.
The tryptophan connection
Protein-rich foods contain tryptophan, an essential amino acid that your body uses to produce serotonin. Serotonin, in turn, converts to melatonin, the hormone that regulates your sleep-wake cycle. Dairy sources of protein are particularly high in tryptophan, which is one reason a glass of warm milk before bed has folk-wisdom credibility.
Blood sugar stability
Many pregnant women report waking at 3 or 4 a.m. and being unable to fall back asleep. Sometimes this is a blood sugar dip. A small protein-containing snack before bed (a handful of almonds, a small portion of cottage cheese, a glass of milk) can help maintain stable blood sugar levels through the night.
The reflux problem
Here is the trade-off. Up to 80% of women experience gastroesophageal reflux disease (GERD) during the third trimester. A large protein shake close to bedtime can make reflux worse, disrupting sleep more than it helps. If you use a protein supplement, take it earlier in the day, not right before bed.
Practical Timing: In our experience helping pregnant women find comfortable sleep at Mattress Miracle, the women who sleep best tend to have their last big meal or supplement at least 2 to 3 hours before bed. A small, easily digestible snack is fine closer to sleep, but anything heavy invites reflux, especially in the third trimester when the growing uterus pushes stomach contents upward.
Sleeping Comfortably in Pregnancy
Up to 80% of women report insomnia symptoms by the end of the third trimester. Back pain affects roughly two out of three pregnant women. These are physical realities that no supplement solves.
What does help is the surface you sleep on and how you position yourself.
Mattress support during pregnancy
As your body changes, your mattress needs shift too. The additional weight, especially concentrated in the abdomen, changes your spinal alignment. A mattress that felt comfortable at 120 pounds may create pressure points and back pain at 150 pounds.
A study in the Journal of Chiropractic Medicine (Jacobson et al., 2008) found that medium-firm mattresses reduce back pain and improve sleep quality. This finding is particularly relevant during pregnancy when back pain is at its peak.
At our Brantford showroom, the Restonic ComfortCare queen ($1,619, 1,222 individually wrapped coils) provides the kind of responsive support that adapts to changing body weight. Individually wrapped coils respond independently to pressure, meaning the area supporting your hips compresses more while your waist gets adequate support.
Sleep position matters
The Society of Obstetricians and Gynaecologists of Canada recommends left-side sleeping during the third trimester to optimize blood flow to the placenta. A pillow between the knees and another supporting the abdomen can reduce hip and lower back pressure.
Dorothy's Advice for Pregnant Sleepers: "When pregnant customers come in, I always mention that your mattress does not stop working for you just because your body is changing. But if your current mattress is already sagging or more than 8 to 10 years old, pregnancy will make every weakness obvious. A proper mattress protector is also non-negotiable during pregnancy, between night sweats and the occasional late-night snack in bed."
Food-First Protein Sources for Pregnancy
Before reaching for a supplement, consider these whole food options that provide protein alongside other nutrients your body needs during pregnancy.
| Food | Protein (approx.) | Bonus Nutrients |
|---|---|---|
| Greek yogurt (1 cup) | 17 g | Calcium, probiotics, tryptophan |
| Chicken breast (100g) | 31 g | Iron, B vitamins, niacin |
| Lentils (1 cup cooked) | 18 g | Folate, iron, fibre |
| Eggs (2 large) | 12 g | Choline, vitamin D, omega-3 (if enriched) |
| Salmon (100g) | 25 g | Omega-3 DHA, vitamin D |
| Cottage cheese (1 cup) | 28 g | Calcium, tryptophan (good evening snack) |
| Almonds (1/4 cup) | 7 g | Magnesium, vitamin E, healthy fats |
Medical disclaimer: This article is for informational purposes only. Nutritional needs during pregnancy vary based on individual health, pre-existing conditions, and trimester. Always discuss dietary changes and supplements with your healthcare provider, obstetrician, or registered dietitian.
Sources
- Health Canada. Prenatal Nutrition Guidelines. canada.ca.
- Elango, R. and Ball, R.O. (2016). Protein and Amino Acid Requirements during Pregnancy. Advances in Nutrition, 7(4), 839S-844S.
- Journal of Nutrition. Protein Requirements of Healthy Pregnant Women during Early and Late Gestation Are Higher than Current Recommendations.
- Society of Obstetricians and Gynaecologists of Canada (SOGC). Prenatal Care Guidelines.
- Jacobson, B.H. et al. (2008). Effect of prescribed sleep surfaces on back pain and sleep quality. Journal of Chiropractic Medicine, 7(3), 113-118.
- PMC (2016). Insomnia during pregnancy: Diagnosis and Rational Interventions.
Shop This Topic at Mattress Miracle
Popular picks at Mattress Miracle:
- Restonic ComfortCare Dalton & Albany mattress
- Whitney double-sided mattress
- Somnia 3.0 posture support pillow
Or explore the full mattress range in our Brantford showroom.
Find Your Perfect Mattress at Mattress Miracle
We are a family-owned mattress store in Brantford, helping our community sleep better since 1997. Come try mattresses in person and get honest, no-pressure advice.
441 1/2 West Street, Brantford, Ontario
Call 519-770-0001Frequently Asked Questions
Is whey protein safe during pregnancy?
Whey protein itself is safe during pregnancy for women without dairy sensitivities. However, the concern is not whey itself but what else is in the product. Protein powders in Canada are not as tightly regulated as pharmaceuticals, meaning they may contain undisclosed heavy metals, artificial sweeteners, or herbal additives that are unsafe during pregnancy. Choose third-party tested products with a Health Canada NPN number and consult your healthcare provider before starting any supplement.
How much protein do pregnant women need daily?
The current Dietary Reference Intake recommends 1.1 grams of protein per kilogram of body weight per day during pregnancy. However, recent Canadian research published in the Journal of Nutrition suggests actual requirements may be higher: 1.2 g/kg per day in early pregnancy and 1.52 g/kg per day in late pregnancy. For a 70 kg woman, that means roughly 77 to 106 grams of protein daily. Most Canadian women already meet or exceed these targets through food alone, primarily from dairy sources.
Can protein intake affect sleep during pregnancy?
Indirectly, yes. Protein-rich foods contain tryptophan, an amino acid that your body converts to serotonin and then melatonin, both important for sleep regulation. Adequate protein also helps stabilize blood sugar overnight, preventing the 3 a.m. wake-ups that many pregnant women experience. However, large protein shakes close to bedtime can worsen gastroesophageal reflux, which already affects up to 80% of women in the third trimester.
What protein powder ingredients should pregnant women avoid?
Avoid protein powders containing herbal blends or proprietary formulas (which may hide unsafe herbs), high levels of caffeine or guarana, artificial sweeteners in large quantities (stevia and erythritol in moderate amounts appear safe), excessive added vitamins (particularly vitamin A, which can be harmful in high doses during pregnancy), and any product without third-party heavy metal testing. Look for simple ingredient lists with recognizable components.
Is it better to get protein from food or supplements during pregnancy?
Food is generally preferred because whole food sources provide protein alongside other essential nutrients like iron, zinc, B vitamins, and fibre. Canadian data shows most pregnant women already exceed protein recommendations through regular diet, particularly dairy sources. Supplements may be helpful for women with severe morning sickness, food aversions, vegan or vegetarian diets, or those carrying multiples. Always consult your healthcare provider or a registered dietitian.
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